Chris Lattner [Sun, 10 Oct 2004 17:06:09 +0000 (17:06 +0000)]
New testcase that crashes -globalopt. I found this through inspection, not
actually in the wild :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16877
91177308-0d34-0410-b5e6-
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Chris Lattner [Sun, 10 Oct 2004 16:47:33 +0000 (16:47 +0000)]
Implement GlobalOpt/deadglobal-2.llx, deletion of globals that are only
stored to, but are stored at variable indexes. This occurs at least in
176.gcc, but probably others, and we should handle it for completeness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16876
91177308-0d34-0410-b5e6-
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Chris Lattner [Sun, 10 Oct 2004 16:46:48 +0000 (16:46 +0000)]
New testcase we were not handling before.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16875
91177308-0d34-0410-b5e6-
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Chris Lattner [Sun, 10 Oct 2004 16:43:46 +0000 (16:43 +0000)]
Avoid calling use_size() which could (in theory) be expensive if the global
has a large number of users. Instead, just keep track of whether we're
making changes as we do so.
This patch has no functionlity changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16874
91177308-0d34-0410-b5e6-
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Chris Lattner [Sun, 10 Oct 2004 16:26:13 +0000 (16:26 +0000)]
bling bling!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16873
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 21:50:05 +0000 (21:50 +0000)]
A testcase that globalopt now handles
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16872
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 21:48:45 +0000 (21:48 +0000)]
Eliminate global pointers that are only stored a single value and null if
we know that all uses of the global will trap if the pointer contained is
null. In this case, we forward substitute the stored value to any uses.
This has the effect of devirtualizing trivial globals in trivial cases. For
example, 164.gzip contains this:
gzip.h:extern int (*read_buf) OF((char *buf, unsigned size));
bits.c: read_buf = file_read;
deflate.c: lookahead = read_buf((char*)window,
deflate.c: n = read_buf((char*)window+strstart+lookahead, more);
Since read_buf has to point to file_read at every use, we just replace
the calls through read_buf with a direct call to file_read.
This occurs in several benchmarks, including 176.gcc and 164.gzip. Direct
calls are good and stuff.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16871
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Chris Lattner [Sat, 9 Oct 2004 21:13:51 +0000 (21:13 +0000)]
Instead of silently breaking, print notification of why this doesn't work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16870
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 19:37:02 +0000 (19:37 +0000)]
Fix grammaro
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16869
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 19:30:36 +0000 (19:30 +0000)]
Use DEBUG instead of DebugFlag directly, as DebugFlag does not respect
-debug-only!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16868
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Chris Lattner [Sat, 9 Oct 2004 19:19:57 +0000 (19:19 +0000)]
It looks like we're not releasing 1.4 with llvm.org as the official domain
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16867
91177308-0d34-0410-b5e6-
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Brian Gaeke [Sat, 9 Oct 2004 05:58:27 +0000 (05:58 +0000)]
update according to tonight's info
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16866
91177308-0d34-0410-b5e6-
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Brian Gaeke [Sat, 9 Oct 2004 05:57:01 +0000 (05:57 +0000)]
Implement getModuleMatchQuality and getJITMatchQuality so that v8 will be the
default 32/BE target on sparc hosts, and ppc will continue to be the default
on other hosts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16865
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 03:32:52 +0000 (03:32 +0000)]
Fix infinite loop due to iteration
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16864
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 02:50:40 +0000 (02:50 +0000)]
Implement sub.ll:test17, -X/C -> X/-C
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16863
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 02:50:01 +0000 (02:50 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16862
91177308-0d34-0410-b5e6-
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Chris Lattner [Sat, 9 Oct 2004 02:18:58 +0000 (02:18 +0000)]
Add a check to avoid an assertion on malformed input
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16861
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Chris Lattner [Fri, 8 Oct 2004 22:41:46 +0000 (22:41 +0000)]
The person who was planning to add SSE support isn't anymore, so disable
the -sse* options (to avoid misleading people).
Also, the stack alignment of the target doesn't depend on whether SSE is
eventually implemented, so remove a comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16860
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Chris Lattner [Fri, 8 Oct 2004 22:24:31 +0000 (22:24 +0000)]
Fix a major regression from the bugfix for 2004-10-08-SelectSetCCFold.llx,
which prevented setcc's from being folded into branches. It appears that
conditional branchinst's CC operand is actually operand(2), not operand(0)
as we might expect. :(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16859
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Chris Lattner [Fri, 8 Oct 2004 22:05:31 +0000 (22:05 +0000)]
If we found a dead global, we should at least delete it...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16858
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Chris Lattner [Fri, 8 Oct 2004 20:59:28 +0000 (20:59 +0000)]
* Pull out the meat of runOnModule into another function for clarity.
* Do not lead dangling dead constants prevent optimization
* Iterate global optimization while we're making progress.
These changes allow us to be more aggressive, handling cases like
GlobalOpt/iterate.llx without a problem (turning it into 'ret int 0').
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16857
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Chris Lattner [Fri, 8 Oct 2004 20:57:46 +0000 (20:57 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16856
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Chris Lattner [Fri, 8 Oct 2004 20:25:55 +0000 (20:25 +0000)]
We might as well delete the known-dead global sooner rather than later since
we know it is dead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16855
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Misha Brukman [Fri, 8 Oct 2004 19:43:31 +0000 (19:43 +0000)]
Hyphenate target-(in)dependent for more tasty grammar goodness (tm)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16854
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Chris Lattner [Fri, 8 Oct 2004 19:15:44 +0000 (19:15 +0000)]
Temporarily disable a buggy transformation until it can be fixed. This fixes
254.gap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16853
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Misha Brukman [Fri, 8 Oct 2004 18:30:22 +0000 (18:30 +0000)]
Adjust paths due to moving InstrSched to lib/Target/SparcV9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16852
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Misha Brukman [Fri, 8 Oct 2004 18:14:56 +0000 (18:14 +0000)]
Use the SparcV9-marked instr scheduling library
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16851
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Misha Brukman [Fri, 8 Oct 2004 18:12:53 +0000 (18:12 +0000)]
InstrSched has been moved to lib/Target/SparcV9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16850
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Misha Brukman [Fri, 8 Oct 2004 18:12:14 +0000 (18:12 +0000)]
InstrSched is SparcV9-specific and so has been moved to lib/Target/SparcV9/
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16849
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Misha Brukman [Fri, 8 Oct 2004 18:11:14 +0000 (18:11 +0000)]
Single-space instead of double-spacing in the Makefile
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16848
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Misha Brukman [Fri, 8 Oct 2004 18:10:48 +0000 (18:10 +0000)]
Build InstrSched as well, and all three subdirs can be built independently
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16847
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Misha Brukman [Fri, 8 Oct 2004 18:10:01 +0000 (18:10 +0000)]
* Adjust for the move to lib/Target/SparcV9/InstrSched
* Rename library to mark it SparcV9-specific
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16846
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Misha Brukman [Fri, 8 Oct 2004 18:05:25 +0000 (18:05 +0000)]
Single-space instead of double-spacing in the Makefile
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16845
91177308-0d34-0410-b5e6-
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Reid Spencer [Fri, 8 Oct 2004 18:01:31 +0000 (18:01 +0000)]
Remove unused variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16844
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Reid Spencer [Fri, 8 Oct 2004 17:59:29 +0000 (17:59 +0000)]
Make it so that positional parameters can have spaces in them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16843
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Chris Lattner [Fri, 8 Oct 2004 17:32:09 +0000 (17:32 +0000)]
Implement SRA for global variables. This allows the other global variable
optimizations to trigger much more often. This allows the elimination of
several dozen more global variables in Programs/External. Note that we only
do this for non-constant globals: constant globals will already be optimized
out if the accesses to them permit it.
This implements Transforms/GlobalOpt/globalsra.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16842
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Chris Lattner [Fri, 8 Oct 2004 17:29:47 +0000 (17:29 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16841
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Chris Lattner [Fri, 8 Oct 2004 16:34:13 +0000 (16:34 +0000)]
Fix bug: 2004-10-08-SelectSetCCFold.llx. Normally this is hidden by the
instcombine xform, which is why we didn't notice it before.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16840
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Chris Lattner [Fri, 8 Oct 2004 16:33:40 +0000 (16:33 +0000)]
New testcase. The setcc is only used by a select, but not as a condition:
it cannot be folded in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16839
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Misha Brukman [Fri, 8 Oct 2004 14:59:05 +0000 (14:59 +0000)]
Properly `quote' names, and don't forget to add the ending quote!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16838
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Reid Spencer [Fri, 8 Oct 2004 05:33:35 +0000 (05:33 +0000)]
Add the --with-automake option to AutoRegen.sh and provide the automake
version of the configure script. This is an early commit of the automake
support so that automake support can be tested on multiple platforms. Many
additional Makefile.am need to be added to LLVM before this is of any use.
Please wait until automake support is announced on llvmdev list before
using the --with-automake option.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16837
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Chris Lattner [Fri, 8 Oct 2004 05:07:56 +0000 (05:07 +0000)]
Instcombine (X & FF00) + xx00 -> (X+xx00) & FF00, implementing and.ll:test27
This comes up when doing adds to bitfield elements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16836
91177308-0d34-0410-b5e6-
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Chris Lattner [Fri, 8 Oct 2004 05:03:25 +0000 (05:03 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16835
91177308-0d34-0410-b5e6-
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Chris Lattner [Fri, 8 Oct 2004 03:46:20 +0000 (03:46 +0000)]
Little patch to turn (shl (add X, 123), 4) -> (add (shl X, 4), 123 << 4)
This triggers in cases of bitfield additions, opening opportunities for
future improvements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16834
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Chris Lattner [Fri, 8 Oct 2004 03:41:59 +0000 (03:41 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16833
91177308-0d34-0410-b5e6-
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Nate Begeman [Fri, 8 Oct 2004 02:49:24 +0000 (02:49 +0000)]
Implement logical and with an immediate that consists of a contiguous block
of one or more 1 bits (may wrap from least significant bit to most
significant bit) as the rlwinm rather than andi., andis., or some longer
instructons sequence.
int andn4(int z) { return z & -4; }
int clearhi(int z) { return z & 0x0000FFFF; }
int clearlo(int z) { return z & 0xFFFF0000; }
int clearmid(int z) { return z & 0x00FFFF00; }
int clearwrap(int z) { return z & 0xFF0000FF; }
_andn4:
rlwinm r3, r3, 0, 0, 29
blr
_clearhi:
rlwinm r3, r3, 0, 16, 31
blr
_clearlo:
rlwinm r3, r3, 0, 0, 15
blr
_clearmid:
rlwinm r3, r3, 0, 8, 23
blr
_clearwrap:
rlwinm r3, r3, 0, 24, 7
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16832
91177308-0d34-0410-b5e6-
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Misha Brukman [Fri, 8 Oct 2004 01:11:15 +0000 (01:11 +0000)]
Fix usage description typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16831
91177308-0d34-0410-b5e6-
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Misha Brukman [Fri, 8 Oct 2004 01:10:52 +0000 (01:10 +0000)]
Make comment header span the entire line
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16830
91177308-0d34-0410-b5e6-
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Misha Brukman [Fri, 8 Oct 2004 00:55:43 +0000 (00:55 +0000)]
Describe how to configure tests to work with f2c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16829
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Misha Brukman [Fri, 8 Oct 2004 00:41:27 +0000 (00:41 +0000)]
* Reformat to fit 80 cols
* Add missing <li> tags
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16828
91177308-0d34-0410-b5e6-
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Nate Begeman [Thu, 7 Oct 2004 22:30:03 +0000 (22:30 +0000)]
Several fixes and enhancements to the PPC32 backend.
1. Fix an illegal argument to getClassB when deciding whether or not to
sign extend a byte load.
2. Initial addition of isLoad and isStore flags to the instruction .td file
for eventual use in a scheduler.
3. Rewrite of how constants are handled in emitSimpleBinaryOperation so
that we can emit the PowerPC shifted immediate instructions far more
often. This allows us to emit the following code:
int foo(int x) { return x | 0x00F0000; }
_foo:
.LBB_foo_0: ; entry
; IMPLICIT_DEF
oris r3, r3, 15
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16826
91177308-0d34-0410-b5e6-
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Nate Begeman [Thu, 7 Oct 2004 22:26:12 +0000 (22:26 +0000)]
Add ori reg, reg, 0 as a move instruction. This can be generated from
loading a 32bit constant into a register whose low halfword is all zeroes.
We now omit the ori after the lis for the following C code:
int bar(int y) { return y * 0x00F0000; }
_bar:
.LBB_bar_0: ; entry
; IMPLICIT_DEF
lis r2, 15
mullw r3, r3, r2
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16825
91177308-0d34-0410-b5e6-
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Nate Begeman [Thu, 7 Oct 2004 22:24:32 +0000 (22:24 +0000)]
Remove unnecessary header include
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16824
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 21:30:30 +0000 (21:30 +0000)]
Improve comments, no functionality changes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16814
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 20:01:31 +0000 (20:01 +0000)]
Fix a nasty dangling pointer problem, due to a free'd pointer being left in
a map. This caused problems if a later object happened to be allocated at
the free'd object's address.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16813
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 19:21:43 +0000 (19:21 +0000)]
Get friendly with Type
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16812
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 19:20:48 +0000 (19:20 +0000)]
Unfortunately the fix for the previous bug introduced the previous
exponential behavior (bork!). This patch processes stuff with an
explicit SCC finder, allowing the algorithm to be more clear,
efficient, and also (as a bonus) correct! This gets us back to taking
0.6s to disassemble my horrible .bc file that previously took something
> 30 mins.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16811
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 19:19:12 +0000 (19:19 +0000)]
Change signature of this method again
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16810
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 19:16:43 +0000 (19:16 +0000)]
These files now live in Transforms/GlobalOpt
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16809
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 19:16:26 +0000 (19:16 +0000)]
Move these files from Transforms/GlobalConstifier
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16808
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 16:19:40 +0000 (16:19 +0000)]
Fix a bug in my previous change. Unfortunately this reverts most of the
speedup, but has the advantage of not breaking a bunch of programs!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16806
91177308-0d34-0410-b5e6-
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Reid Spencer [Thu, 7 Oct 2004 16:03:21 +0000 (16:03 +0000)]
Make these scripts work on SunOS too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16805
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 06:01:25 +0000 (06:01 +0000)]
Fix a bug in the safety analysis routine
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16804
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 06:00:24 +0000 (06:00 +0000)]
Comment cleanups
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16803
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 04:16:33 +0000 (04:16 +0000)]
* Rename pass to globalopt, since we do more than just constify
* Instead of handling dead functions specially, just nuke them.
* Be more aggressive about cleaning up after constification, in
particular, handle getelementptr instructions and constantexprs.
* Be a little bit more structured about how we process globals.
*** Delete globals that are only stored to, and never read. These are
clearly not useful, so they should go. This implements deadglobal.llx
This last one triggers quite a few times. In particular, 2208 in the
external tests, 1865 of which are in 252.eon. This shrinks eon from
1995094 to
1732341 bytes of bytecode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16802
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 04:12:02 +0000 (04:12 +0000)]
Rename pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16801
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 04:10:36 +0000 (04:10 +0000)]
This pass is not needed, as there is only ever one global: the stack
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16800
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 04:07:08 +0000 (04:07 +0000)]
Add new testcase, rename pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16799
91177308-0d34-0410-b5e6-
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Chris Lattner [Thu, 7 Oct 2004 00:03:11 +0000 (00:03 +0000)]
Don't add libz or libbz2 to the USEDLIBS lists, those are for LLVM libraries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16798
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Chris Lattner [Wed, 6 Oct 2004 23:08:03 +0000 (23:08 +0000)]
Don't call memset if malloc returns a null pointer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16797
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Chris Lattner [Wed, 6 Oct 2004 20:57:02 +0000 (20:57 +0000)]
Implement GlobalConstifier/trivialstore.llx, and also do some
simplifications of the resultant program to avoid making later passes
do it all.
This allows us to constify globals that just have the same constant that
they are initialized stored into them.
Suprisingly this comes up ALL of the freaking time, dozens of times in
SPEC, 30 times in vortex alone.
For example, on 256.bzip2, it allows us to constify these two globals:
%smallMode = internal global ubyte 0 ; <ubyte*> [#uses=8]
%verbosity = internal global int 0 ; <int*> [#uses=49]
Which (with later optimizations) results in the bytecode file shrinking
from 82286 to 69686 bytes! Lets hear it for IPO :)
For the record, it's nuking lots of "if (verbosity > 2) { do lots of stuff }"
code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16793
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Chris Lattner [Wed, 6 Oct 2004 20:42:51 +0000 (20:42 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16791
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Chris Lattner [Wed, 6 Oct 2004 19:29:13 +0000 (19:29 +0000)]
Dont' let null nodes sneak past cast instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16779
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Misha Brukman [Wed, 6 Oct 2004 17:19:58 +0000 (17:19 +0000)]
Undoxyfy internal method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16774
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Misha Brukman [Wed, 6 Oct 2004 16:56:16 +0000 (16:56 +0000)]
Doxygen-ify comments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16773
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Chris Lattner [Wed, 6 Oct 2004 16:36:46 +0000 (16:36 +0000)]
Change Type::isAbstract to have better comments, a more correct name
(PromoteAbstractToConcrete), and to use a set to avoid recomputation.
In particular, this set eliminates the potentially exponential cases
from this little recursive algorithm.
On a particularly nasty testcase, llvm-dis on the .bc file went from 34
minutes (which is when I killed it, it still hadn't finished) to 0.57s.
Remember kids, exponential algorithms are bad.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16772
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Chris Lattner [Wed, 6 Oct 2004 16:34:23 +0000 (16:34 +0000)]
Rename method, change comment, add argument
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16771
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Chris Lattner [Wed, 6 Oct 2004 16:28:24 +0000 (16:28 +0000)]
Correct some typeos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16770
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Chris Lattner [Wed, 6 Oct 2004 15:08:25 +0000 (15:08 +0000)]
Instcombine: -(X sdiv C) -> (X sdiv -C), tested by sub.ll:test16
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16769
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Chris Lattner [Wed, 6 Oct 2004 15:07:56 +0000 (15:07 +0000)]
New testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16768
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Chris Lattner [Wed, 6 Oct 2004 14:31:50 +0000 (14:31 +0000)]
Remove debugging code, fix encoding problem. This fixes the problems
the JIT had last night.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16766
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Nate Begeman [Wed, 6 Oct 2004 11:03:30 +0000 (11:03 +0000)]
Turning on fsel code gen now that we can do so would be good.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16765
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Nate Begeman [Wed, 6 Oct 2004 09:53:04 +0000 (09:53 +0000)]
Implement floating point select for lt, gt, le, ge using the powerpc fsel
instruction.
Now, rather than emitting the following loop out of bisect:
.LBB_main_19: ; no_exit.0.i
rlwinm r3, r2, 3, 0, 28
lfdx f1, r3, r27
addis r3, r30, ha16(.CPI_main_1-"L00000$pb")
lfd f2, lo16(.CPI_main_1-"L00000$pb")(r3)
fsub f2, f2, f1
addis r3, r30, ha16(.CPI_main_1-"L00000$pb")
lfd f4, lo16(.CPI_main_1-"L00000$pb")(r3)
fcmpu cr0, f1, f4
bge .LBB_main_64 ; no_exit.0.i
.LBB_main_63: ; no_exit.0.i
b .LBB_main_65 ; no_exit.0.i
.LBB_main_64: ; no_exit.0.i
fmr f2, f1
.LBB_main_65: ; no_exit.0.i
addi r3, r2, 1
rlwinm r3, r3, 3, 0, 28
lfdx f1, r3, r27
addis r3, r30, ha16(.CPI_main_1-"L00000$pb")
lfd f4, lo16(.CPI_main_1-"L00000$pb")(r3)
fsub f4, f4, f1
addis r3, r30, ha16(.CPI_main_1-"L00000$pb")
lfd f5, lo16(.CPI_main_1-"L00000$pb")(r3)
fcmpu cr0, f1, f5
bge .LBB_main_67 ; no_exit.0.i
.LBB_main_66: ; no_exit.0.i
b .LBB_main_68 ; no_exit.0.i
.LBB_main_67: ; no_exit.0.i
fmr f4, f1
.LBB_main_68: ; no_exit.0.i
fadd f1, f2, f4
addis r3, r30, ha16(.CPI_main_2-"L00000$pb")
lfd f2, lo16(.CPI_main_2-"L00000$pb")(r3)
fmul f1, f1, f2
rlwinm r3, r2, 3, 0, 28
lfdx f2, r3, r28
fadd f4, f2, f1
fcmpu cr0, f4, f0
bgt .LBB_main_70 ; no_exit.0.i
.LBB_main_69: ; no_exit.0.i
b .LBB_main_71 ; no_exit.0.i
.LBB_main_70: ; no_exit.0.i
fmr f0, f4
.LBB_main_71: ; no_exit.0.i
fsub f1, f2, f1
addi r2, r2, -1
fcmpu cr0, f1, f3
blt .LBB_main_73 ; no_exit.0.i
.LBB_main_72: ; no_exit.0.i
b .LBB_main_74 ; no_exit.0.i
.LBB_main_73: ; no_exit.0.i
fmr f3, f1
.LBB_main_74: ; no_exit.0.i
cmpwi cr0, r2, -1
fmr f16, f0
fmr f17, f3
bgt .LBB_main_19 ; no_exit.0.i
We emit this instead:
.LBB_main_19: ; no_exit.0.i
rlwinm r3, r2, 3, 0, 28
lfdx f1, r3, r27
addis r3, r30, ha16(.CPI_main_1-"L00000$pb")
lfd f2, lo16(.CPI_main_1-"L00000$pb")(r3)
fsub f2, f2, f1
fsel f1, f1, f1, f2
addi r3, r2, 1
rlwinm r3, r3, 3, 0, 28
lfdx f2, r3, r27
addis r3, r30, ha16(.CPI_main_1-"L00000$pb")
lfd f4, lo16(.CPI_main_1-"L00000$pb")(r3)
fsub f4, f4, f2
fsel f2, f2, f2, f4
fadd f1, f1, f2
addis r3, r30, ha16(.CPI_main_2-"L00000$pb")
lfd f2, lo16(.CPI_main_2-"L00000$pb")(r3)
fmul f1, f1, f2
rlwinm r3, r2, 3, 0, 28
lfdx f2, r3, r28
fadd f4, f2, f1
fsub f5, f0, f4
fsel f0, f5, f0, f4
fsub f1, f2, f1
addi r2, r2, -1
fsub f2, f1, f3
fsel f3, f2, f3, f1
cmpwi cr0, r2, -1
fmr f16, f0
fmr f17, f3
bgt .LBB_main_19 ; no_exit.0.i
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16764
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Chris Lattner [Wed, 6 Oct 2004 05:01:07 +0000 (05:01 +0000)]
Codegen signed mod by 2 or -2 more efficiently. Instead of generating:
t:
mov %EDX, DWORD PTR [%ESP + 4]
mov %ECX, 2
mov %EAX, %EDX
sar %EDX, 31
idiv %ECX
mov %EAX, %EDX
ret
Generate:
t:
mov %ECX, DWORD PTR [%ESP + 4]
*** mov %EAX, %ECX
cdq
and %ECX, 1
xor %ECX, %EDX
sub %ECX, %EDX
*** mov %EAX, %ECX
ret
Note that the two marked moves are redundant, and should be eliminated by the
register allocator, but aren't.
Compare this to GCC, which generates:
t:
mov %eax, DWORD PTR [%esp+4]
mov %edx, %eax
shr %edx, 31
lea %ecx, [%edx+%eax]
and %ecx, -2
sub %eax, %ecx
ret
or ICC 8.0, which generates:
t:
movl 4(%esp), %ecx #3.5
movl $-
2147483647, %eax #3.25
imull %ecx #3.25
movl %ecx, %eax #3.25
sarl $31, %eax #3.25
addl %ecx, %edx #3.25
subl %edx, %eax #3.25
addl %eax, %eax #3.25
negl %eax #3.25
subl %eax, %ecx #3.25
movl %ecx, %eax #3.25
ret #3.25
We would be in great shape if not for the moves.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16763
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Chris Lattner [Wed, 6 Oct 2004 04:21:52 +0000 (04:21 +0000)]
Really fix FreeBSD, which apparently doesn't tolerate the extern.
Thanks to Jeff Cohen for pointing out my goof.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16762
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Chris Lattner [Wed, 6 Oct 2004 04:19:43 +0000 (04:19 +0000)]
Fix a scary bug with signed division by a power of two. We used to generate:
s: ;; X / 4
mov %EAX, DWORD PTR [%ESP + 4]
mov %ECX, %EAX
sar %ECX, 1
shr %ECX, 30
mov %EDX, %EAX
add %EDX, %ECX
sar %EAX, 2
ret
When we really meant:
s:
mov %EAX, DWORD PTR [%ESP + 4]
mov %ECX, %EAX
sar %ECX, 1
shr %ECX, 30
add %EAX, %ECX
sar %EAX, 2
ret
Hey, this also reduces register pressure too :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16761
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Chris Lattner [Wed, 6 Oct 2004 04:02:39 +0000 (04:02 +0000)]
Codegen signed divides by 2 and -2 more efficiently. In particular
instead of:
s: ;; X / 2
movl 4(%esp), %eax
movl %eax, %ecx
shrl $31, %ecx
movl %eax, %edx
addl %ecx, %edx
sarl $1, %eax
ret
t: ;; X / -2
movl 4(%esp), %eax
movl %eax, %ecx
shrl $31, %ecx
movl %eax, %edx
addl %ecx, %edx
sarl $1, %eax
negl %eax
ret
Emit:
s:
movl 4(%esp), %eax
cmpl $-
2147483648, %eax
sbbl $-1, %eax
sarl $1, %eax
ret
t:
movl 4(%esp), %eax
cmpl $-
2147483648, %eax
sbbl $-1, %eax
sarl $1, %eax
negl %eax
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16760
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Chris Lattner [Wed, 6 Oct 2004 04:01:02 +0000 (04:01 +0000)]
Add some new instructions. Fix the asm string for sbb32rr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16759
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Chris Lattner [Wed, 6 Oct 2004 03:27:37 +0000 (03:27 +0000)]
Reduce code growth implied by the tail duplication pass by not duplicating
an instruction if it can be hoisted to a common dominator of the block.
This implements: test/Regression/Transforms/TailDup/MergeTest.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16758
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Chris Lattner [Wed, 6 Oct 2004 03:26:38 +0000 (03:26 +0000)]
When tail duplicating these functions, the add instruction should not be
duplicated, even though the block it is in is duplicated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16757
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Chris Lattner [Wed, 6 Oct 2004 03:15:44 +0000 (03:15 +0000)]
FreeBSD uses GCC. Patch contributed by Jeff Cohen!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16756
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Chris Lattner [Wed, 6 Oct 2004 03:13:47 +0000 (03:13 +0000)]
Fix the path to the fixinc'd headers. Patch contributed by Jeff Cohen!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16755
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Brian Gaeke [Tue, 5 Oct 2004 18:46:59 +0000 (18:46 +0000)]
Must include sys/stat.h before declaring a 'struct stat'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16728
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Brian Gaeke [Tue, 5 Oct 2004 18:05:53 +0000 (18:05 +0000)]
Build BFtoLLVM example front-end by default
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16719
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Brian Gaeke [Tue, 5 Oct 2004 18:05:25 +0000 (18:05 +0000)]
Add BFtoLLVM example front end
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16714
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Chris Lattner [Tue, 5 Oct 2004 02:28:11 +0000 (02:28 +0000)]
Make sure the const bit gets inherited correctly when linking declarations
of disagreeing constness. This fixes
test/Regression/Linker/ConstantGlobals[123].ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16692
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Chris Lattner [Tue, 5 Oct 2004 02:16:01 +0000 (02:16 +0000)]
Another testcase for constness linkage
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16691
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Chris Lattner [Tue, 5 Oct 2004 02:12:20 +0000 (02:12 +0000)]
Testcase to ensure that the 'constant' flag follows the definition when there
is a question.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16690
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Reid Spencer [Tue, 5 Oct 2004 00:56:46 +0000 (00:56 +0000)]
Adjust sys/stat.h inclusion so its only for SunOS.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16686
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Tanya Lattner [Tue, 5 Oct 2004 00:51:26 +0000 (00:51 +0000)]
Added a couple of includes to get this to compile on Sparc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16685
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