Matheus Almeida [Wed, 26 Mar 2014 13:40:29 +0000 (13:40 +0000)]
[mips] Add support for '.option pic2'.
The directive '.option pic2' enables PIC from assembly source.
At the moment none of the macros/directives check the PIC bit
but that's going to be fixed relatively soon. For example, the
expansion of macros like 'la' depend on the relocation model.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204803
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Renato Golin [Wed, 26 Mar 2014 12:52:28 +0000 (12:52 +0000)]
Add @llvm.clear_cache builtin
Implementing the LLVM part of the call to __builtin___clear_cache
which translates into an intrinsic @llvm.clear_cache and is lowered
by each target, either to a call to __clear_cache or nothing at all
incase the caches are unified.
Updating LangRef and adding some tests for the implemented architectures.
Other archs will have to implement the method in case this builtin
has to be compiled for it, since the default behaviour is to bail
unimplemented.
A Clang patch is required for the builtin to be lowered into the
llvm intrinsic. This will be done next.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204802
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Hal Finkel [Wed, 26 Mar 2014 12:49:28 +0000 (12:49 +0000)]
[PowerPC] Lower VSELECT using xxsel when VSX is available
With VSX there is a real vector select instruction, and so we should use it.
Note that VSELECT will still scalarize for v2f64 because the corresponding
SetCC result type (v2i64) is not currently a legal type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204801
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Daniel Sanders [Wed, 26 Mar 2014 11:46:34 +0000 (11:46 +0000)]
[mips] Add tests for t0-t3 for N32/N64
These are aliases of t4-t7 and are provided for compatibility with both the
original ABI documentation (using t4-t7) and GNU As (using t0-t3)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204797
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Daniel Sanders [Wed, 26 Mar 2014 11:39:07 +0000 (11:39 +0000)]
[mips] The register names depend on the ABI being N32/N64 rather than the arch being mips64
Summary: Added test cases for O32 and N32 on MIPS64.
Reviewers: matheusalmeida
Reviewed By: matheusalmeida
Differential Revision: http://llvm-reviews.chandlerc.com/D3175
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204796
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Timur Iskhodzhanov [Wed, 26 Mar 2014 11:24:36 +0000 (11:24 +0000)]
Follow-up to r204790: don't try to emit line tables if there are no functions with DI in the TU
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204795
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Daniel Sanders [Wed, 26 Mar 2014 11:05:24 +0000 (11:05 +0000)]
[mips] $s8 is an alias for $fp in all ABI's, not just N32/N64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204793
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Daniel Sanders [Wed, 26 Mar 2014 10:54:30 +0000 (10:54 +0000)]
[mips] Move the CHECK lines in mips*-register-names.s to make it more obvious which CHECK matches with which insn
This reveals a small mistake in mips-register-names.s ($sp is tested twice and
$s8 is not tested) which will be fixed in a follow-up commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204792
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Timur Iskhodzhanov [Wed, 26 Mar 2014 09:51:45 +0000 (09:51 +0000)]
Add tests for r204790
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204791
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Timur Iskhodzhanov [Wed, 26 Mar 2014 09:50:36 +0000 (09:50 +0000)]
Fix PR19239 - Add support for generating debug info for functions without lexical scopes and/or debug info at all
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204790
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Timur Iskhodzhanov [Wed, 26 Mar 2014 08:45:02 +0000 (08:45 +0000)]
Use -LABEL checks in the COFF debug info tests
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204788
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Rafael Espindola [Wed, 26 Mar 2014 06:14:40 +0000 (06:14 +0000)]
Revert "Prevent alias from pointing to weak aliases."
This reverts commit r204781.
I will follow up to with msan folks to see what is what they
were trying to do with aliases to weak aliases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204784
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Hal Finkel [Wed, 26 Mar 2014 04:55:40 +0000 (04:55 +0000)]
[PowerPC] Generate logical vector VSX instructions
These instructions are essentially the same as their Altivec counterparts, but
have access to the larger VSX register file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204782
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Rafael Espindola [Wed, 26 Mar 2014 04:48:47 +0000 (04:48 +0000)]
Prevent alias from pointing to weak aliases.
Aliases are just another name for a position in a file. As such, the
regular symbol resolutions are not applied. For example, given
define void @my_func() {
ret void
}
@my_alias = alias weak void ()* @my_func
@my_alias2 = alias void ()* @my_alias
We produce without this patch:
.weak my_alias
my_alias = my_func
.globl my_alias2
my_alias2 = my_alias
That is, in the resulting ELF file my_alias, my_func and my_alias are
just 3 names pointing to offset 0 of .text. That is *not* the
semantics of IR linking. For example, linking in a
@my_alias = alias void ()* @other_func
would require the strong my_alias to override the weak one and
my_alias2 would end up pointing to other_func.
There is no way to represent that with aliases being just another
name, so the best solution seems to be to just disallow it, converting
a miscompile into an error.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204781
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David Blaikie [Wed, 26 Mar 2014 03:05:10 +0000 (03:05 +0000)]
DebugInfo: Add fission-related sections to COFF
Allows this test to pass on COFF platforms so we don't need to restrict
this test to a single target anymore.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204780
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Rafael Espindola [Wed, 26 Mar 2014 00:16:43 +0000 (00:16 +0000)]
Correctly detect if a symbol uses a reserved section index or not.
The logic was incorrect for variables, causing them to end up in the wrong
section if the section had an index >= 0xff00.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204771
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Quentin Colombet [Wed, 26 Mar 2014 00:10:22 +0000 (00:10 +0000)]
[X86] Add broadcast instructions to the table used by ExeDepsFix pass.
Adds the different broadcast instructions to the ReplaceableInstrsAVX2 table.
That way the ExeDepsFix pass can take better decisions when AVX2 broadcasts are
across domain (int <-> float).
In particular, prior to this patch we were generating:
vpbroadcastd LCPI1_0(%rip), %ymm2
vpand %ymm2, %ymm0, %ymm0
vmaxps %ymm1, %ymm0, %ymm0 ## <- domain change penalty
Now, we generate the following nice sequence where everything is in the float
domain:
vbroadcastss LCPI1_0(%rip), %ymm2
vandps %ymm2, %ymm0, %ymm0
vmaxps %ymm1, %ymm0, %ymm0
<rdar://problem/
16354675>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204770
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Rafael Espindola [Tue, 25 Mar 2014 23:44:25 +0000 (23:44 +0000)]
Create .symtab_shndxr only when needed.
We need .symtab_shndxr if and only if a symbol references a section with an
index >= 0xff00.
The old code was trying to figure out if the section was needed ahead of time,
making it a fairly dependent on the code actually writing the table. It was
also somewhat conservative and would create the section in cases where it was
not needed.
If I remember correctly, the old structure was there so that the sections were
created in the same order gas creates them. That was valuable when MC's support
for ELF was new and we tested with elf-dump.py.
This patch refactors the symbol table creation to another class and makes it
obvious that .symtab_shndxr is really only created when we are about to output
a reference to a section index >= 0xff00.
While here, also improve the tests to use macros. One file is one section
short of needing .symtab_shndxr, the second one has just the right number.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204769
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Hal Finkel [Tue, 25 Mar 2014 23:29:21 +0000 (23:29 +0000)]
[PowerPC] Select between VSX A-type and M-type FMA instructions just before RA
The VSX instruction set has two types of FMA instructions: A-type (where the
addend is taken from the output register) and M-type (where one of the product
operands is taken from the output register). This adds a small pass that runs
just after MI scheduling (and, thus, just before register allocation) that
mutates A-type instructions (that are created during isel) into M-type
instructions when:
1. This will eliminate an otherwise-necessary copy of the addend
2. One of the product operands is killed by the instruction
The "right" moment to make this decision is in between scheduling and register
allocation, because only there do we know whether or not one of the product
operands is killed by any particular instruction. Unfortunately, this also
makes the implementation somewhat complicated, because the MIs are not in SSA
form and we need to preserve the LiveIntervals analysis.
As a simple example, if we have:
%vreg5<def> = COPY %vreg9; VSLRC:%vreg5,%vreg9
%vreg5<def,tied1> = XSMADDADP %vreg5<tied0>, %vreg17, %vreg16,
%RM<imp-use>; VSLRC:%vreg5,%vreg17,%vreg16
...
%vreg9<def,tied1> = XSMADDADP %vreg9<tied0>, %vreg17, %vreg19,
%RM<imp-use>; VSLRC:%vreg9,%vreg17,%vreg19
...
We can eliminate the copy by changing from the A-type to the
M-type instruction. This means:
%vreg5<def,tied1> = XSMADDADP %vreg5<tied0>, %vreg17, %vreg16,
%RM<imp-use>; VSLRC:%vreg5,%vreg17,%vreg16
is replaced by:
%vreg16<def,tied1> = XSMADDMDP %vreg16<tied0>, %vreg18, %vreg9,
%RM<imp-use>; VSLRC:%vreg16,%vreg18,%vreg9
and we remove: %vreg5<def> = COPY %vreg9; VSLRC:%vreg5,%vreg9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204768
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NAKAMURA Takumi [Tue, 25 Mar 2014 23:16:44 +0000 (23:16 +0000)]
llvm/test/DebugInfo/empty.ll: Suppress crash for targeting pecoff while investigating.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204766
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Rafael Espindola [Tue, 25 Mar 2014 22:43:53 +0000 (22:43 +0000)]
Use Endian.h to simplify this code a bit.
While at it, factor some logic into FragmentWriter. This will allow more code
to be factored out of the fairly large ELFObjectWriter.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204765
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Meador Inge [Tue, 25 Mar 2014 21:45:41 +0000 (21:45 +0000)]
[configure/make] Propagate names of build host tools when making BuildTools
When cross-compiling LLVM itself the configure/make scripts get confused when
creating the needed build host tools. For example, building and configuring
like:
CC_FOR_BUILD='i686-pc-linux-gnu-gcc' CXX_FOR_BUILD='i686-pc-linux-gnu-g++'
CXX='i686-mingw32-g++' CC='i686-mingw32-gcc' LD='i686-mingw32-ld' /scratch
/meadori/llvm-trunk/src/trunk/configure --host=i686-mingw32
CC_FOR_BUILD='i686-pc-linux-gnu-gcc' CXX_FOR_BUILD='i686-pc-linux-gnu-g++'
CXX='i686-mingw32-g++' CC='i686-mingw32-gcc' LD='i686-mingw32-ld' make
causes the following build break:
checking whether the C compiler works... configure: error: cannot run C
compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
The 'config.log' shows that i686-mingw32-gcc is being used to create
executables for the build host.
This patch fixes the problem by propogating the names of the build host
tools via BUILD_* when configuring/making BuildTools.
Original patch by Ekaterina Sanina.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204760
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Juergen Ributzka [Tue, 25 Mar 2014 21:21:10 +0000 (21:21 +0000)]
[Constant Hoisting] Make the constant candidate map local to the collectConstantCandidates method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204758
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Hal Finkel [Tue, 25 Mar 2014 19:26:43 +0000 (19:26 +0000)]
[PowerPC] Correct commutable indices for VSX FMA instructions
Although the first two operands are the ones that can be swapped, the tied
input operand is listed before them, so we need to adjust for that.
I have a test case for this, but it goes along with an upcoming commit (so it
will come soon).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204748
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Hal Finkel [Tue, 25 Mar 2014 18:55:11 +0000 (18:55 +0000)]
[PowerPC] Add a TableGen relation for A-type and M-type VSX FMA instructions
TableGen will create a lookup table for the A-type FMA instructions providing
their corresponding M-form opcodes. This will be used by upcoming commits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204746
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Matt Arsenault [Tue, 25 Mar 2014 18:18:27 +0000 (18:18 +0000)]
R600: Move computeMaskedBitsForTargetNode out of AMDILISelLowering.cpp
Remove handling of select_cc, since it makes no sense to be there. This
now does nothing, but I'll be adding some handling of other target nodes
soon.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204743
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Duncan P. N. Exon Smith [Tue, 25 Mar 2014 18:01:38 +0000 (18:01 +0000)]
blockfreq: Implement Pass::releaseMemory()
Implement Pass::releaseMemory() in BlockFrequencyInfo and
MachineBlockFrequencyInfo. Just delete the private implementation when
not in use. Switch to a std::unique_ptr to make the logic more clear.
<rdar://problem/
14292693>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204741
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Duncan P. N. Exon Smith [Tue, 25 Mar 2014 18:01:32 +0000 (18:01 +0000)]
blockfreq: Use const in MachineBlockFrequencyInfo
<rdar://problem/
14292693>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204740
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Juergen Ributzka [Tue, 25 Mar 2014 18:01:25 +0000 (18:01 +0000)]
[X86TTI] Make constant base pointers for getElementPtr opaque.
If getElementPtr uses a constant as base pointer, then make the constant opaque.
This prevents constant folding it with the offset. The offset can usually be
encoded in the load/store instruction itself and the base address doesn't have
to be rematerialized several times.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204739
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Juergen Ributzka [Tue, 25 Mar 2014 18:01:23 +0000 (18:01 +0000)]
[Stackmaps][X86TTI] Fix think-o in getIntImmCost calculation.
The cost for the first four stackmap operands was always TCC_Free.
This is only true for the first two operands. All other operands
are TCC_Free if they are within 64bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204738
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Juergen Ributzka [Tue, 25 Mar 2014 18:01:20 +0000 (18:01 +0000)]
[DAG] Keep the opaque constant flag when performing unary constant folding operations.
Usually opaque constants shouldn't be folded, unless they are simple unary
operations that don't create new constants. Although this shouldn't drop the
opaque constant flag. This commit fixes this.
Related to <rdar://problem/
14774662>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204737
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Adam Nemet [Tue, 25 Mar 2014 17:47:06 +0000 (17:47 +0000)]
[X86] Generate VPSHUFB for in-place v16i16 shuffles
This used to resort to splitting the 256-bit operation into two 128-bit
shuffles and then recombining the results.
Fixes <rdar://problem/
16167303>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204735
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Adam Nemet [Tue, 25 Mar 2014 17:47:03 +0000 (17:47 +0000)]
[X86] Factor out new helper getPSHUFB
I found three implementations of this. This splits it out into a new function
and uses it from the three places.
My plan is to add a fourth use when lowering a vector_shuffle:v16i16.
Compared the assembly output of test/CodeGen/X86 before and after.
The only change is due to how the first PSHUFB was generated in
LowerVECTOR_SHUFFLEv8i16. If the shuffle mask specified undef (i.e. -1), the
old implementation would write -1 * 2 and -1 * 2 + 1 (254 and 255) in the
control mask. Now we write 0x80. These are of course interchangeable since
bit 7 decides if a constant zero is written in the result byte. The other
instances of this code use 0x80 consistently.
Related to <rdar://problem/
16167303>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204734
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Richard Osborne [Tue, 25 Mar 2014 17:21:41 +0000 (17:21 +0000)]
[InstCombine] Don't fold bitcast into store if it would need addrspacecast
Summary:
Previously the code didn't check if the before and after types for the
store were pointers to different address spaces. This resulted in
instcombine using a bitcast to convert between pointers to different
address spaces, causing an assertion due to the invalid cast.
It is not be appropriate to use addrspacecast this case because it is
not guaranteed to be a no-op cast. Instead bail out and do not do the
transformation.
CC: llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D3117
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204733
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Richard Osborne [Tue, 25 Mar 2014 17:21:35 +0000 (17:21 +0000)]
Reuse earlier variables to make it clear the types involved in the cast.
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204732
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Benjamin Kramer [Tue, 25 Mar 2014 17:20:28 +0000 (17:20 +0000)]
Add missing slash to make the doxygen output less confusing.
PR19187.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204731
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Matt Arsenault [Tue, 25 Mar 2014 16:50:55 +0000 (16:50 +0000)]
R600: Add failing testcase for <3 x i32> stores.
This is supposed to have the same store size and alignment as <4 x i32>,
but currently is split into a 64-bit and 32-bit store.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204729
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Benjamin Kramer [Tue, 25 Mar 2014 16:25:12 +0000 (16:25 +0000)]
ScalarEvolution: Compute exit counts for loops with a power-of-2 step.
If we have a loop of the form
for (unsigned n = 0; n != (k & -32); n += 32) {}
then we know that n is always divisible by 32 and the loop must
terminate. Even if we have a condition where the loop counter will
overflow it'll always hold this invariant.
PR19183. Our loop vectorizer creates this pattern and it's also
occasionally formed by loop counters derived from pointers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204728
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Matt Arsenault [Tue, 25 Mar 2014 16:09:21 +0000 (16:09 +0000)]
Fix creating illegal setcc cond codes.
If GT/UGT or LT/ULT were set to expand, a comparison
with a constant would replace it with the illegal
cond code.
There are several more places later in this function that
will have the same basic problem.
Theoretically R600 should hit this problem for a test,
but for some reason it doesn't.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204727
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Evgeniy Stepanov [Tue, 25 Mar 2014 14:32:05 +0000 (14:32 +0000)]
[msan] Relax the test some more.
This may or may not fix the bots. R204720 did not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204721
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Evgeniy Stepanov [Tue, 25 Mar 2014 14:15:14 +0000 (14:15 +0000)]
[msan] Make some tests less strict.
This may or may not fix the bots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204720
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Rafael Espindola [Tue, 25 Mar 2014 13:19:03 +0000 (13:19 +0000)]
Fix these tests on windows.
It is impossible to create a hard link to a non existing file, so create a
dummy file, create the link an delete the dummy file.
On windows one cannot remove the current directory, so chdir first.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204719
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Evgeniy Stepanov [Tue, 25 Mar 2014 13:08:34 +0000 (13:08 +0000)]
[msan] More precise instrumentation of select IR.
Some bits of select result may be initialized even if select condition
is not.
https://code.google.com/p/memory-sanitizer/issues/detail?id=50
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204716
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Daniel Sanders [Tue, 25 Mar 2014 13:01:06 +0000 (13:01 +0000)]
[mips] '.set at=$0' should be equivalent to '.set noat'
Differential Revision: http://llvm-reviews.chandlerc.com/D3171
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204714
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Cameron McInally [Tue, 25 Mar 2014 12:36:38 +0000 (12:36 +0000)]
Fix AVX2 Gather execution domains.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204713
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Daniel Sanders [Tue, 25 Mar 2014 11:16:03 +0000 (11:16 +0000)]
[mips] Correct testcase for .set at=$reg and emit the new warnings for numeric registers too.
Summary:
Remove the XFAIL added in my previous commit and correct the test such that
it correctly tests the expansion of the assembler temporary.
Also added a test to check that $at is always $1 when written by the
user.
Corrected the new assembler temporary warnings so that they are emitted for
numeric registers too.
Differential Revision: http://llvm-reviews.chandlerc.com/D3169
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204711
91177308-0d34-0410-b5e6-
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Daniel Sanders [Tue, 25 Mar 2014 10:57:07 +0000 (10:57 +0000)]
[mips] Fix assembler temporary expansion and add associated warnings about the use of $at.
Summary:
The assembler temporary is normally $at ($1) but can be reassigned using
'.set at=$reg'. Regardless of which register is nominated as the assembler
temporary, $at remains $1 when written by the user.
Adds warnings under the following conditions:
* The register nominated as the assembler temporary is used by the user.
* '.set noat' is in effect and $at is used by the user.
Both of these only work for named registers. I have a follow up commit that makes it work for numeric registers as well.
XFAIL set-at-directive.s since it incorrectly tests that $at is redefined by
'.set at=$reg'. Testcases will follow in a separate commit.
Patch by David Chisnall
His work was sponsored by: DARPA, AFRL
Differential Revision: http://llvm-reviews.chandlerc.com/D3167
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204710
91177308-0d34-0410-b5e6-
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Yaron Keren [Tue, 25 Mar 2014 09:34:20 +0000 (09:34 +0000)]
Remove cmake module support for Visual C++ 2010 (MSVC10)
but keep the MSVC11 (Visual C++ 2012) support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204706
91177308-0d34-0410-b5e6-
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Erik Verbruggen [Tue, 25 Mar 2014 09:06:18 +0000 (09:06 +0000)]
Simplify loop that worked around bugs in old GCC/Xcode.
GCC 4.0.1 and Xcode 2 are no longer supported for building llvm/clang.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204705
91177308-0d34-0410-b5e6-
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Yaron Keren [Tue, 25 Mar 2014 08:42:49 +0000 (08:42 +0000)]
Disable Visual C++ warning 4722 about aborting a destructor,
it has no value for us.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204704
91177308-0d34-0410-b5e6-
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David Majnemer [Tue, 25 Mar 2014 06:14:26 +0000 (06:14 +0000)]
WinCOFF: Add support for -fdata-sections
This is a pretty straight forward translation for COFF, we just need to
stick the data in a COMDAT section marked as
IMAGE_COMDAT_SELECT_NODUPLICATES.
N.B. We must be careful to avoid sticking entities with private linkage
in COMDAT groups. COFF is pretty hostile to the renaming of entities so
we must be careful to disallow GlobalVariables with unstable names.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204703
91177308-0d34-0410-b5e6-
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David Blaikie [Tue, 25 Mar 2014 05:34:24 +0000 (05:34 +0000)]
DebugInfo: Add GNU_addr_base and GNU_ranges_base only when there are addresses or ranges
Based on code review feedback from Eric in r204672.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204702
91177308-0d34-0410-b5e6-
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Saleem Abdulrasool [Tue, 25 Mar 2014 03:39:39 +0000 (03:39 +0000)]
test: fix CHECK lines
Thanks to gix for pointing out that the CHECK-LABEL lines were incorrect!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204700
91177308-0d34-0410-b5e6-
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Andrew Trick [Tue, 25 Mar 2014 02:18:47 +0000 (02:18 +0000)]
SLP vectorizer: Don't hoist vector extracts of phis.
Extracts coming from phis were being hoisted, while all others were
sunk to their uses. This was inconsistent and didn't seem to serve a
purpose. Changing all extracts to be sunk to uses is a prerequisite
for adding block frequency to the SLP vectorizer's cost model.
I benchmarked the change in isolation (without block frequency). I
only saw noise on x86 and some potentially significant improvements on
ARM. No major regressions is good enough for me.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204699
91177308-0d34-0410-b5e6-
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David Blaikie [Tue, 25 Mar 2014 01:44:02 +0000 (01:44 +0000)]
DebugInfo: Support debug_loc under fission
Implement debug_loc.dwo, as well as llvm-dwarfdump support for dumping
this section.
Outlined in the DWARF5 spec and http://gcc.gnu.org/wiki/DebugFission the
debug_loc.dwo section has more variation than the standard debug_loc,
allowing 3 different forms of entry (plus the end of list entry). GCC
seems to, and Clang certainly, only use one form, so I've just
implemented dumping support for that for now.
It wasn't immediately obvious that there was a good refactoring to share
the implementation of dumping support between debug_loc and
debug_loc.dwo, so they're separate for now - ideas welcome or I may come
back to it at some point.
As per a comment in the code, we could choose different forms that may
reduce the number of debug_addr entries we emit, but that will require
further study.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204697
91177308-0d34-0410-b5e6-
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David Blaikie [Tue, 25 Mar 2014 01:43:56 +0000 (01:43 +0000)]
DebugInfo: Remove unnecessary zero-size check
This seems excessive - switching section isn't expensive (or if it is
we're already being wasteful, since we emitted the debug_loc section
symbol earlier anyway) and otherwise there's no work that happens in
this function when the list is empty.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204696
91177308-0d34-0410-b5e6-
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Justin Bogner [Tue, 25 Mar 2014 01:04:44 +0000 (01:04 +0000)]
Support: Functions for consuming endian specific data from a buffer.
This adds a function to Endian.h that reads from and updates a pointer
into a buffer with endian specific data. This is more convenient for
stream-like reading of data than endian::read.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204693
91177308-0d34-0410-b5e6-
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Manman Ren [Tue, 25 Mar 2014 00:16:25 +0000 (00:16 +0000)]
Register Allocator: check other options before using a CSR for the first time.
When register allocator's stage is RS_Spill, we choose spill over using the CSR
for the first time, if the spill cost is lower than CSRCost.
When register allocator's stage is < RS_Split, we choose pre-splitting over
using the CSR for the first time, if the cost of splitting is lower than
CSRCost.
CSRCost is set with command-line option "regalloc-csr-first-time-cost". The
default value is 0 to generate the same codes as before this commit.
With a value of 15 (1 << 14 is the entry frequency), I measured performance
gain of 3% on 253.perlbmk and 1.7% on 197.parser, with instrumented PGO,
on an arm device.
rdar://
16162005
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204690
91177308-0d34-0410-b5e6-
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Kevin Enderby [Tue, 25 Mar 2014 00:05:50 +0000 (00:05 +0000)]
Fix crashes when assembler directives are used that are not
for Mach-O object files by generating an error instead.
rdar://
16335232
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204687
91177308-0d34-0410-b5e6-
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Manman Ren [Mon, 24 Mar 2014 23:23:42 +0000 (23:23 +0000)]
Register Allocator: refactoring (no functionality change).
Factor out two functions calculateRegionSplitCost and doRegionSplit
from tryRegionSplit. These two functions will be used in coming patches.
rdar://
16162005
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204684
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 22:38:38 +0000 (22:38 +0000)]
DebugInfo: Simplify debug loc list handling by keeping separate lists
Rather than using a flat list with "empty" entries (ala the actual
on-disk format), keep separate lists for each variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204680
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 22:27:06 +0000 (22:27 +0000)]
DwarfDebug: Simplify debug_loc merging
No functional change intended.
Merging up-front rather than delaying this task until later. This just
seems simpler and more efficient (avoiding growing the debug loc list
only to have to skip over those post-merged entries, etc).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204679
91177308-0d34-0410-b5e6-
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Adrian Prantl [Mon, 24 Mar 2014 21:33:01 +0000 (21:33 +0000)]
Get rid of an unnecessary use of the * and & operators.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204673
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 21:31:35 +0000 (21:31 +0000)]
DebugInfo: Add DW_AT_GNU_ranges_base to skeleton CUs
This is used to avoid relocations in the dwo file by allowing
DW_AT_ranges specified in debug_info.dwo to be relative to this base
address. (r204667 implements the base-relative DW_AT_ranges side of
this)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204672
91177308-0d34-0410-b5e6-
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Justin Bogner [Mon, 24 Mar 2014 21:30:55 +0000 (21:30 +0000)]
Support: Document Endian.h functions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204671
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 21:07:27 +0000 (21:07 +0000)]
DebugInfo: Implement relative addressing for DW_AT_ranges under fission
This removes the debug_ranges relocations from debug_info.dwo (but
doesn't implement the DW_AT_GNU_ranges_base which is also necessary for
correct functioning)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204668
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 20:53:02 +0000 (20:53 +0000)]
DebugInfo: Don't emit relocations to abbreviations in debug_info.dwo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204667
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 20:31:01 +0000 (20:31 +0000)]
DwarfDebug: Remove an unused parameter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204665
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 20:29:02 +0000 (20:29 +0000)]
R600: Don't viewCFG() under DEBUG() except on failure.
Having these popping up every time you use -debug is really
irritating.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204664
91177308-0d34-0410-b5e6-
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David Blaikie [Mon, 24 Mar 2014 20:28:10 +0000 (20:28 +0000)]
Remove unused parameter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204663
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 20:08:13 +0000 (20:08 +0000)]
R600/SI: Fix extra mov from legalizing 64-bit SALU ops.
Check the register class of each operand individually
to avoid an extra copy to a vgpr.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204662
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 20:08:09 +0000 (20:08 +0000)]
R600/SI: Sub-optimial fix for 64-bit immediates with SALU ops.
No longer asserts, but now you get moves loading legal immediates
into the split 32-bit operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204661
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 20:08:05 +0000 (20:08 +0000)]
R600/SI: Fix 64-bit bit ops that require the VALU.
Try to match scalar and first like the other instructions.
Expand 64-bit ands to a pair of 32-bit ands since that is not
available on the VALU.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204660
91177308-0d34-0410-b5e6-
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Yaron Keren [Mon, 24 Mar 2014 19:48:13 +0000 (19:48 +0000)]
In Release modes, Visual Studio complains that the Operator destructor in User.cpp
never returns, which is true by design.
Initially assumed that the reason is llvm_unreachable being dependent on NDEBUG.
However, even if llvm_unreachable is replaced by __assume(false), VC still warns in
Release modes but not in Debug modes...
The real reason turned out to be optimization flags.
With /Od in Debug modes the warning is not issued whereas with /O1 it is.
I could not find any documentation to this effect, but it is reproducable:
Try compiling http://msdn.microsoft.com/en-us/library/khwfyc5d(v=vs.90).aspx
with /O1 and then with /Od.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204659
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 19:43:31 +0000 (19:43 +0000)]
R600: Implement isNarrowingProfitable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204658
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 18:26:52 +0000 (18:26 +0000)]
R600/SI: Move splitting 64-bit immediates to separate function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204651
91177308-0d34-0410-b5e6-
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Aaron Ballman [Mon, 24 Mar 2014 18:18:31 +0000 (18:18 +0000)]
Adding some very nascent information about the clang tablegen backends, with a promise to add more information later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204635
91177308-0d34-0410-b5e6-
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Ulrich Weigand [Mon, 24 Mar 2014 18:16:09 +0000 (18:16 +0000)]
[PowerPC] Generate little-endian object files
As a first step towards real little-endian code generation, this patch
changes the PowerPC MC layer to actually generate little-endian object
files. This involves passing the little-endian flag through the various
layers, including down to createELFObjectWriter so we actually get basic
little-endian ELF objects, emitting instructions in little-endian order,
and handling fixups and relocations as appropriate for little-endian.
The bulk of the patch is to update most test cases in test/MC/PowerPC
to verify both big- and little-endian encodings. (The only test cases
*not* updated are those that create actual big-endian ABI code, like
the TLS tests.)
Note that while the object files are now little-endian, the generated
code itself is not yet updated, in particular, it still does not adhere
to the ELFv2 ABI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204634
91177308-0d34-0410-b5e6-
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Quentin Colombet [Mon, 24 Mar 2014 17:54:19 +0000 (17:54 +0000)]
[X86][ISelDAG] Add missing fallback patterns for avx2 broadcast instructions.
Those patterns are used when the load cannot be folded into the related broadcast
during the select phase.
This happens when the load gets additional uses that were not anticipated during
the previous lowering phases (constant vector to constant load, then constant
load reused) or when selection DAG is not able to prove that folding the load
will not create a cycle in the DAG.
<rdar://problem/
16074331>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204631
91177308-0d34-0410-b5e6-
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Matt Arsenault [Mon, 24 Mar 2014 17:50:46 +0000 (17:50 +0000)]
R600/SI: Fix 64-bit private loads.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204630
91177308-0d34-0410-b5e6-
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Hans Wennborg [Mon, 24 Mar 2014 17:33:22 +0000 (17:33 +0000)]
VS integration installer: set SUCCESS=1 if we find VS 2013
Previously we would print an error message on machines where the only VS
version we find is 2013, even though we successfully install the integration
files for it.
Also, we shouldn't have two END labels.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204629
91177308-0d34-0410-b5e6-
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Eli Bendersky [Mon, 24 Mar 2014 16:52:30 +0000 (16:52 +0000)]
Add test to test/CodeGen/NVPTX for "alloca buffer" arguments.
Make sure such IR gets properly lowered to PTX.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204624
91177308-0d34-0410-b5e6-
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Adam Nemet [Mon, 24 Mar 2014 16:52:08 +0000 (16:52 +0000)]
[X86] Fix non-determinism in LowerVectorAllZeroTest
This can be observed with the old testcase of CodeGen/X86/pr12312.ll:
47c47
< vorps %ymm0, %ymm1, %ymm0
---
> vorps %ymm1, %ymm0, %ymm0
97c97
< vorps %ymm1, %ymm0, %ymm0
---
> vorps %ymm0, %ymm1, %ymm0
The vector VecIns is populated with all the values from VecInMap. This is done
while iterating VecInMap. VecInMap uses a hash of pointer values so the
resulting order can vary depending on the memory layout.
The fix is to populate the vector VecIns earlier as VecInMap is populated.
This is done in DAG traversal order.
Fixes <rdar://problem/
16398806>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204623
91177308-0d34-0410-b5e6-
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Daniel Sanders [Mon, 24 Mar 2014 16:48:01 +0000 (16:48 +0000)]
[mips] Add error message when trying to use $at in '.set noat' mode.
Summary:
Patch by David Chisnall
His work was sponsored by: DARPA, AFRL
Differential Revision: http://llvm-reviews.chandlerc.com/D3158
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204621
91177308-0d34-0410-b5e6-
96231b3b80d8
Eli Bendersky [Mon, 24 Mar 2014 16:36:39 +0000 (16:36 +0000)]
Removes the NVPTXSplitBBatBar pass.
This pass is a historic remnant and actually causes less efficient code to be
generated in some cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204620
91177308-0d34-0410-b5e6-
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Tom Stellard [Mon, 24 Mar 2014 16:12:34 +0000 (16:12 +0000)]
R600/SI: Fix warning with gcc 4.8.2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204618
91177308-0d34-0410-b5e6-
96231b3b80d8
Tom Stellard [Mon, 24 Mar 2014 16:07:30 +0000 (16:07 +0000)]
R600/SI: Promote fp64 SELECT to i64
This type promotion is replacing a Tablegen pattern and it is already
covered by existing tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204617
91177308-0d34-0410-b5e6-
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Tom Stellard [Mon, 24 Mar 2014 16:07:28 +0000 (16:07 +0000)]
SelectionDAG: Allow promotion of SELECT nodes from float to int types
And vice-versa, as long as the types are the same width.
There are a few R600 tests that will cover this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204616
91177308-0d34-0410-b5e6-
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Tom Stellard [Mon, 24 Mar 2014 16:07:25 +0000 (16:07 +0000)]
R600: Reorganize tablegen instruction definitions
Each GPU family now has its own file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204615
91177308-0d34-0410-b5e6-
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Will Schmidt [Mon, 24 Mar 2014 16:04:15 +0000 (16:04 +0000)]
[PPC64LE] ELFv2 ABI updates for the .opd section
[PPC64LE] ELFv2 ABI updates for the .opd section
The PPC64 Little Endian (PPC64LE) target supports the ELFv2 ABI, and as
such, does not have a ".opd" section. This is keyed off a _CALL_ELF=2
macro check.
The CALL_ELF check is not clearly documented at this time. The basis
for usage in this patch is from the gcc thread here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01144.html
> Adding comment from Uli:
Looks good to me. I think the old-style JIT doesn't really work
anyway for 64-bit, but at least with this patch LLVM will compile
and link again on a ppc64le host ...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204614
91177308-0d34-0410-b5e6-
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Daniel Sanders [Mon, 24 Mar 2014 15:42:21 +0000 (15:42 +0000)]
[mips] Add regression tests for parenthetic expressions in MIPS assembly.
Summary:
These expressions already worked but weren't tested.
Patch by Robert N. M. Watson and David Chisnall (it was originally two patches)
Their work was sponsored by: DARPA, AFRL
Differential Revision: http://llvm-reviews.chandlerc.com/D3156
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204612
91177308-0d34-0410-b5e6-
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Daniel Sanders [Mon, 24 Mar 2014 15:38:00 +0000 (15:38 +0000)]
[mips] Allow dsubu to take an immediate as an alias for dsubiu.
Summary:
Patch by David Chisnall
His work was sponsored by: DARPA, AFRL
Differential Revision: http://llvm-reviews.chandlerc.com/D3155
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204611
91177308-0d34-0410-b5e6-
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Hal Finkel [Mon, 24 Mar 2014 15:07:28 +0000 (15:07 +0000)]
[PowerPC] Mark many instructions as commutative
I'm under the impression that we used to infer the isCommutable flag from the
instruction-associated pattern. Regardless, we don't seem to do this (at least
by default) any more. I've gone through all of our instruction definitions, and
marked as commutative all of those that should be trivial to commute (by
exchanging the first two operands). There has been special code for the RL*
instructions, and that's not changed.
Before this change, we had the following commutative instructions:
RLDIMI
RLDIMIo
RLWIMI
RLWIMI8
RLWIMI8o
RLWIMIo
XSADDDP
XSMULDP
XVADDDP
XVADDSP
XVMULDP
XVMULSP
After:
ADD4
ADD4o
ADD8
ADD8o
ADDC
ADDC8
ADDC8o
ADDCo
ADDE
ADDE8
ADDE8o
ADDEo
AND
AND8
AND8o
ANDo
CRAND
CREQV
CRNAND
CRNOR
CROR
CRXOR
EQV
EQV8
EQV8o
EQVo
FADD
FADDS
FADDSo
FADDo
FMADD
FMADDS
FMADDSo
FMADDo
FMSUB
FMSUBS
FMSUBSo
FMSUBo
FMUL
FMULS
FMULSo
FMULo
FNMADD
FNMADDS
FNMADDSo
FNMADDo
FNMSUB
FNMSUBS
FNMSUBSo
FNMSUBo
MULHD
MULHDU
MULHDUo
MULHDo
MULHW
MULHWU
MULHWUo
MULHWo
MULLD
MULLDo
MULLW
MULLWo
NAND
NAND8
NAND8o
NANDo
NOR
NOR8
NOR8o
NORo
OR
OR8
OR8o
ORo
RLDIMI
RLDIMIo
RLWIMI
RLWIMI8
RLWIMI8o
RLWIMIo
VADDCUW
VADDFP
VADDSBS
VADDSHS
VADDSWS
VADDUBM
VADDUBS
VADDUHM
VADDUHS
VADDUWM
VADDUWS
VAND
VAVGSB
VAVGSH
VAVGSW
VAVGUB
VAVGUH
VAVGUW
VMADDFP
VMAXFP
VMAXSB
VMAXSH
VMAXSW
VMAXUB
VMAXUH
VMAXUW
VMHADDSHS
VMHRADDSHS
VMINFP
VMINSB
VMINSH
VMINSW
VMINUB
VMINUH
VMINUW
VMLADDUHM
VMULESB
VMULESH
VMULEUB
VMULEUH
VMULOSB
VMULOSH
VMULOUB
VMULOUH
VNMSUBFP
VOR
VXOR
XOR
XOR8
XOR8o
XORo
XSADDDP
XSMADDADP
XSMAXDP
XSMINDP
XSMSUBADP
XSMULDP
XSNMADDADP
XSNMSUBADP
XVADDDP
XVADDSP
XVMADDADP
XVMADDASP
XVMAXDP
XVMAXSP
XVMINDP
XVMINSP
XVMSUBADP
XVMSUBASP
XVMULDP
XVMULSP
XVNMADDADP
XVNMADDASP
XVNMSUBADP
XVNMSUBASP
XXLAND
XXLNOR
XXLOR
XXLXOR
This is a by-inspection change, and I'm not sure how to write a reliable test
case. I would like advice on this, however.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204609
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Daniel Sanders [Mon, 24 Mar 2014 14:05:39 +0000 (14:05 +0000)]
[mips] Implement shorthand add / sub forms for MIPS.
Summary:
- If only two registers are passed to a three-register operation, then the
first argument is both source and destination register.
- If a non-register is passed as the last argument, generate the immediate
version of the instruction.
Also mark DADD commutative and add scheduling information (to the generic
scheduler), and implement DSUB.
Patch by David Chisnall
His work was sponsored by: DARPA, AFRL
CC: theraven
Differential Revision: http://llvm-reviews.chandlerc.com/D3148
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204605
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Justin Holewinski [Mon, 24 Mar 2014 11:17:53 +0000 (11:17 +0000)]
[NVPTX] Add isel patterns for addrspacecast
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204600
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Renato Golin [Mon, 24 Mar 2014 11:02:38 +0000 (11:02 +0000)]
Update release notes with EHABI current behaviour
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204598
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Hal Finkel [Mon, 24 Mar 2014 09:51:41 +0000 (09:51 +0000)]
[PowerPC] Don't schedule VSX copy legalization unless VSX is enabled
There is no need to schedule this extra pass if it will have nothing to do.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204594
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Hal Finkel [Mon, 24 Mar 2014 09:36:36 +0000 (09:36 +0000)]
[PowerPC] Update comment re: VSX copy-instruction selection
I've done some experimentation with this, and it looks like using the
lower-latency (but lower throughput) copy instruction is essentially always the
right thing to do.
My assumption is that, in order to be relatively sure that the higher-latency
copy will increase throughput, we'd want to have it unlikely to be in-flight
with its use. On the P7, the global completion table (GCT) can hold a maximum
of 120 instructions, shared among all active threads (up to 4), giving 30
instructions per thread. So specifically, I'd require at least that many
instructions between the copy and the use before the high-latency variant is
used.
Trying this, however, over the entire test suite resulted in zero cases where
the high-latency form would be preferable. This may be a consequence of the
fact that the scheduler views copies as free, and so they tend to end up close
to their uses. For this experiment I created a function:
unsigned chooseVSXCopy(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
unsigned DestReg, unsigned SrcReg,
unsigned StartDist = 1,
unsigned Depth = 3) const;
with an implementation like:
if (!Depth)
return PPC::XXLOR;
const unsigned MaxDist = 30;
unsigned Dist = StartDist;
for (auto J = I, JE = MBB.end(); J != JE && Dist <= MaxDist; ++J) {
if (J->isTransient() && !J->isCopy())
continue;
if (J->isCall() || J->isReturn() || J->readsRegister(DestReg, TRI))
return PPC::XXLOR;
++Dist;
}
// We've exceeded the required distance for the high-latency form, use it.
if (Dist > MaxDist)
return PPC::XVCPSGNDP;
// If this is only an exit block, use the low-latency form.
if (MBB.succ_empty())
return PPC::XXLOR;
// We've reached the end of the block, check the successor blocks (up to some
// depth), and use the high-latency form if that is okay with all successors.
for (auto J = MBB.succ_begin(), JE = MBB.succ_end(); J != JE; ++J) {
if (chooseVSXCopy(**J, (*J)->begin(), DestReg, SrcReg,
Dist, --Depth) == PPC::XXLOR)
return PPC::XXLOR;
}
// All of our successor blocks seem okay with the high-latency variant, so
// we'll use it.
return PPC::XVCPSGNDP;
and then changed the copy opcode selection from:
Opc = PPC::XXLOR;
to:
Opc = chooseVSXCopy(MBB, std::next(I), DestReg, SrcReg);
In conclusion, I'm removing the FIXME from the comment, because I believe that
there is, at least absent other examples, nothing to fix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204591
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Rafael Espindola [Mon, 24 Mar 2014 05:00:34 +0000 (05:00 +0000)]
Teach llvm-readobj to print human friendly description of reserved sections.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204584
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Karthik Bhat [Mon, 24 Mar 2014 04:36:06 +0000 (04:36 +0000)]
Allow constant folding of ceil function whenever feasible
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204583
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