Chris Lattner [Sun, 29 Feb 2004 00:27:00 +0000 (00:27 +0000)]
Add an instruction selector capable of selecting 'ret void'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11973
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Alkis Evlogimenos [Sat, 28 Feb 2004 23:46:44 +0000 (23:46 +0000)]
SHLD and SHRD take 32-bit operands but an 8-bit immediate. Rename them
to denote this fact.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11972
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Alkis Evlogimenos [Sat, 28 Feb 2004 23:42:35 +0000 (23:42 +0000)]
Floating point loads/stores act on memory operands. Rename them to
denote this fact.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11971
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Alkis Evlogimenos [Sat, 28 Feb 2004 23:09:03 +0000 (23:09 +0000)]
Rename instruction templates to be easier to the human eye to
parse. The name is now I (operand size)*. For example:
Im32 -> instruction with 32-bit memory operands.
Im16i8 -> instruction with 16-bit memory operands and 8 bit immediate
operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11970
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Alkis Evlogimenos [Sat, 28 Feb 2004 22:06:59 +0000 (22:06 +0000)]
Uncomment instructions that take both an immediate and a memory
operand but their sizes differ.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11969
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Brian Gaeke [Sat, 28 Feb 2004 22:06:03 +0000 (22:06 +0000)]
Fix my sloppiness
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11968
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Alkis Evlogimenos [Sat, 28 Feb 2004 22:02:05 +0000 (22:02 +0000)]
Each instruction now has both an ImmType and a MemType. This describes
the size of the immediate and the memory operand on instructions that
use them. This resolves problems with instructions that take both a
memory and an immediate operand but their sizes differ (i.e. ADDmi32b).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11967
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Brian Gaeke [Sat, 28 Feb 2004 21:55:18 +0000 (21:55 +0000)]
Fix typo in comment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11966
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Chris Lattner [Sat, 28 Feb 2004 21:30:39 +0000 (21:30 +0000)]
Add a testcase for switch instruction induction
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11965
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Chris Lattner [Sat, 28 Feb 2004 21:28:10 +0000 (21:28 +0000)]
Implement switch->br and br->switch folding by ripping out the switch->switch
and br->br code and generalizing it. This allows us to compile code like this:
int test(Instruction *I) {
if (isa<CastInst>(I))
return foo(7);
else if (isa<BranchInst>(I))
return foo(123);
else if (isa<UnwindInst>(I))
return foo(1241);
else if (isa<SetCondInst>(I))
return foo(1);
else if (isa<VAArgInst>(I))
return foo(42);
return foo(-1);
}
into:
int %_Z4testPN4llvm11InstructionE("struct.llvm::Instruction"* %I) {
entry:
%tmp.1.i.i.i.i.i.i.i = getelementptr "struct.llvm::Instruction"* %I, long 0, ubyte 4 ; <uint*> [#uses=1]
%tmp.2.i.i.i.i.i.i.i = load uint* %tmp.1.i.i.i.i.i.i.i ; <uint> [#uses=2]
%tmp.2.i.i.i.i.i.i = seteq uint %tmp.2.i.i.i.i.i.i.i, 27 ; <bool> [#uses=0]
switch uint %tmp.2.i.i.i.i.i.i.i, label %endif.0 [
uint 27, label %then.0
uint 2, label %then.1
uint 5, label %then.2
uint 14, label %then.3
uint 15, label %then.3
uint 16, label %then.3
uint 17, label %then.3
uint 18, label %then.3
uint 19, label %then.3
uint 32, label %then.4
]
...
As well as handling the cases in 176.gcc and many other programs more effectively.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11964
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Chris Lattner [Sat, 28 Feb 2004 20:21:45 +0000 (20:21 +0000)]
Change this so that LLC actually tries to run the code generator, though it will
immediately abort due to lack of an instruction selector. :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11963
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Chris Lattner [Sat, 28 Feb 2004 19:55:16 +0000 (19:55 +0000)]
Add a hook to run with the V8 target, though it doesn't currently work. Also
mark the PPC backend as experimental
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11962
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Chris Lattner [Sat, 28 Feb 2004 19:54:16 +0000 (19:54 +0000)]
Add hook for V8 target
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11961
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Chris Lattner [Sat, 28 Feb 2004 19:54:00 +0000 (19:54 +0000)]
SparcV8 now builds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11960
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Chris Lattner [Sat, 28 Feb 2004 19:53:18 +0000 (19:53 +0000)]
fine grainify namespacification
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11959
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Chris Lattner [Sat, 28 Feb 2004 19:52:49 +0000 (19:52 +0000)]
Finegrainify namespacification
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11958
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Chris Lattner [Sat, 28 Feb 2004 19:45:39 +0000 (19:45 +0000)]
Tab completion is our friend.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11957
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Chris Lattner [Sat, 28 Feb 2004 19:43:40 +0000 (19:43 +0000)]
Clean up rules
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11956
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Chris Lattner [Sat, 28 Feb 2004 19:37:18 +0000 (19:37 +0000)]
Bring this directory into "it actually compiles" land
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11955
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Chris Lattner [Sat, 28 Feb 2004 19:31:32 +0000 (19:31 +0000)]
Fix multiple inclusion problem
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11954
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Chris Lattner [Sat, 28 Feb 2004 18:51:45 +0000 (18:51 +0000)]
if there is already a prototype for malloc/free, use it, even if it's incorrect.
Do not just inject a new prototype.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11951
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Chris Lattner [Sat, 28 Feb 2004 17:41:48 +0000 (17:41 +0000)]
Do not remove an active template argument even if the superclass had one of the
same name
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11950
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Chris Lattner [Sat, 28 Feb 2004 17:33:21 +0000 (17:33 +0000)]
fix a bug in the testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11949
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Chris Lattner [Sat, 28 Feb 2004 17:31:28 +0000 (17:31 +0000)]
Ignore X = X assignments that was causing Alkis's rewrite of X86.td to crash
tblgen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11948
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Chris Lattner [Sat, 28 Feb 2004 16:43:44 +0000 (16:43 +0000)]
new testcase for a tblgen bug that alkis ran into
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11947
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Chris Lattner [Sat, 28 Feb 2004 16:31:53 +0000 (16:31 +0000)]
Assert instead of going into an infinite loop!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11946
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Brian Gaeke [Sat, 28 Feb 2004 06:26:20 +0000 (06:26 +0000)]
ELF constants and data structures.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11945
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Alkis Evlogimenos [Sat, 28 Feb 2004 06:01:43 +0000 (06:01 +0000)]
Do not generate instructions with mismatched memory/immediate sized
operands. The X86 backend doesn't handle them properly right now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11944
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Chris Lattner [Sat, 28 Feb 2004 05:28:42 +0000 (05:28 +0000)]
new testcase for intrinsic folding
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11943
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Chris Lattner [Sat, 28 Feb 2004 05:26:06 +0000 (05:26 +0000)]
The instruction combining pass removes dead instructions, there is no need
to run the die pass after it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11942
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Chris Lattner [Sat, 28 Feb 2004 05:22:00 +0000 (05:22 +0000)]
Rename AddUsesToWorkList -> AddUsersToWorkList, as that is what it does.
Create a new AddUsesToWorkList method
optimize memmove/set/cpy of zero bytes to a noop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11941
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Chris Lattner [Sat, 28 Feb 2004 04:57:37 +0000 (04:57 +0000)]
Turn 'free null' into nothing
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11940
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Misha Brukman [Sat, 28 Feb 2004 03:37:58 +0000 (03:37 +0000)]
Right, it's really Extractor, not Extraction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11939
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Misha Brukman [Sat, 28 Feb 2004 03:33:30 +0000 (03:33 +0000)]
New Function-level transformation utils.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11938
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Misha Brukman [Sat, 28 Feb 2004 03:33:17 +0000 (03:33 +0000)]
Add the prototype for the LoopExtractor Pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11937
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Misha Brukman [Sat, 28 Feb 2004 03:33:01 +0000 (03:33 +0000)]
A pass that uses the generic CodeExtractor to rip out *every* loop in every
function, as long as the loop isn't the only one in that function. This should
help debugging passes easier with BugPoint.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11936
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Misha Brukman [Sat, 28 Feb 2004 03:26:20 +0000 (03:26 +0000)]
A generic code extractor: given a list of BasicBlocks, it will rip them out into
a new function, taking care of inputs and outputs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11935
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Misha Brukman [Sat, 28 Feb 2004 03:20:41 +0000 (03:20 +0000)]
Two testcases for loops: one with outputs, one without.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11934
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Alkis Evlogimenos [Sat, 28 Feb 2004 03:20:31 +0000 (03:20 +0000)]
Further comment updates.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11933
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Alkis Evlogimenos [Sat, 28 Feb 2004 03:12:31 +0000 (03:12 +0000)]
Update comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11932
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Alkis Evlogimenos [Sat, 28 Feb 2004 02:56:26 +0000 (02:56 +0000)]
My previous commit broke the jit. The shift instructions always take
an 8-bit immediate. So mark the shifts that take immediates as taking
an 8-bit argument. The rest with the implicit use of CL are marked
appropriately.
A bug still exists:
def SHLDmri32 : I2A8 <"shld", 0xA4, MRMDestMem>, TB; // [mem32] <<= [mem32],R32 imm8
The immediate in the above instruction is 8-bit but the memory
reference is 32-bit. The printer prints this as an 8-bit reference
which confuses the assembler. Same with SHRDmri32.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11931
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Brian Gaeke [Fri, 27 Feb 2004 21:15:40 +0000 (21:15 +0000)]
Turn off the SparcV9MachineCodeDestructionPass for now, because it's buggy
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11930
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Brian Gaeke [Fri, 27 Feb 2004 21:01:14 +0000 (21:01 +0000)]
Correct DestroyMachineFunction's getPassName
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11929
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Chris Lattner [Fri, 27 Feb 2004 20:05:15 +0000 (20:05 +0000)]
Only clone global nodes between graphs if both graphs have the global.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11928
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Chris Lattner [Fri, 27 Feb 2004 20:04:48 +0000 (20:04 +0000)]
ADD MORE FUNCTIONS!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11927
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Alkis Evlogimenos [Fri, 27 Feb 2004 19:46:30 +0000 (19:46 +0000)]
Fix argument size for SHL, SHR, SAR, SHLD and SHRD families of
instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11923
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Alkis Evlogimenos [Fri, 27 Feb 2004 18:57:00 +0000 (18:57 +0000)]
Fix encoding of ADD and SUB family of instructions. Also rearrange
them so that they are consistent with AND, XOR, etc...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11922
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Alkis Evlogimenos [Fri, 27 Feb 2004 18:55:12 +0000 (18:55 +0000)]
Rename MRMS[0-7]{r,m} to MRM[0-7]{r,m}.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11921
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Chris Lattner [Fri, 27 Feb 2004 18:09:25 +0000 (18:09 +0000)]
setcond instructions don't have aliasing implications.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11919
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John Criswell [Fri, 27 Feb 2004 18:02:06 +0000 (18:02 +0000)]
Added d and hbd MultiSource applications.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11915
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Chris Lattner [Fri, 27 Feb 2004 17:28:25 +0000 (17:28 +0000)]
Fix Regression/Assembler/2004-02-27-SelfUseAssertError.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11913
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Chris Lattner [Fri, 27 Feb 2004 17:26:08 +0000 (17:26 +0000)]
Fix a verifier bug that was preventing us from ripping povray+libpng to pieces.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11912
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Chris Lattner [Fri, 27 Feb 2004 17:00:29 +0000 (17:00 +0000)]
Build zlib and libpng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11911
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Chris Lattner [Fri, 27 Feb 2004 16:17:20 +0000 (16:17 +0000)]
Updates from Reid
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11908
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Alkis Evlogimenos [Fri, 27 Feb 2004 16:13:37 +0000 (16:13 +0000)]
Add memory operand folding support for the SETcc family of
instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11907
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Alkis Evlogimenos [Fri, 27 Feb 2004 15:05:28 +0000 (15:05 +0000)]
Make MachineOperand's immediate value an int and save 4 bytes out of
each MachineOperand. We don't really need an int64_t immediate :-).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11906
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Alkis Evlogimenos [Fri, 27 Feb 2004 15:03:18 +0000 (15:03 +0000)]
Add memory operand folding support for SHLD and SHRD instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11905
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Alkis Evlogimenos [Fri, 27 Feb 2004 09:28:43 +0000 (09:28 +0000)]
Add memory operand folding support for SHL, SHR and SAR, SHLD instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11903
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Alkis Evlogimenos [Fri, 27 Feb 2004 06:57:05 +0000 (06:57 +0000)]
Rename SHL, SHR, SAR, SHLD and SHLR instructions to make them
consistent with the rest and also pepare for the addition of their
memory operand variants.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11902
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Chris Lattner [Fri, 27 Feb 2004 06:28:34 +0000 (06:28 +0000)]
Initial checkin of document, contributed by Reid Spencer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11901
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Chris Lattner [Fri, 27 Feb 2004 06:27:46 +0000 (06:27 +0000)]
Implement test/Regression/Transforms/InstCombine/canonicalize_branch.ll
This is a really minor thing, but might help out the 'switch statement induction'
code in simplifycfg.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11900
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Chris Lattner [Fri, 27 Feb 2004 06:27:07 +0000 (06:27 +0000)]
The instcombiner should canonicalize comparisons.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11899
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Alkis Evlogimenos [Fri, 27 Feb 2004 06:11:15 +0000 (06:11 +0000)]
Rename member function to be consistent with the rest.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11898
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Alkis Evlogimenos [Fri, 27 Feb 2004 05:26:23 +0000 (05:26 +0000)]
Add improvements to the code generator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11896
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Alkis Evlogimenos [Fri, 27 Feb 2004 04:51:35 +0000 (04:51 +0000)]
Make spiller push stores right after the definition of a register so
that they are as far away from the loads as possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11895
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Alkis Evlogimenos [Fri, 27 Feb 2004 01:52:34 +0000 (01:52 +0000)]
Fix crash caused by passing register 0 to
MRegisterInfo::isPhysicalRegister().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11894
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Alkis Evlogimenos [Thu, 26 Feb 2004 23:22:23 +0000 (23:22 +0000)]
Clear maps right after basic block is processed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11892
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Misha Brukman [Thu, 26 Feb 2004 23:20:29 +0000 (23:20 +0000)]
Doxygenify comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11891
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Misha Brukman [Thu, 26 Feb 2004 23:20:08 +0000 (23:20 +0000)]
Doxygenify and tersify comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11890
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John Criswell [Thu, 26 Feb 2004 23:13:34 +0000 (23:13 +0000)]
Added PR258 and 259.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11889
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John Criswell [Thu, 26 Feb 2004 23:02:25 +0000 (23:02 +0000)]
Added support for C++ compilation.
Made removing the object files a separate sh command so that it can easily
be commented out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11888
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John Criswell [Thu, 26 Feb 2004 23:01:21 +0000 (23:01 +0000)]
C++ version of llvm-native-gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11887
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John Criswell [Thu, 26 Feb 2004 22:56:13 +0000 (22:56 +0000)]
Fixed test case to actually check for the static declaration.
Oops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11886
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John Criswell [Thu, 26 Feb 2004 22:55:11 +0000 (22:55 +0000)]
Regression tests for PR258 and PR259.
2004-02-26-FPNotPrintableConstants.llx ensures that constants used in an
LLVM program are declared static if they are assigned to global variables.
2004-02-26-LinkOnceFunctions.llx ensures that linkonce functions get the
weak attribute.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11885
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John Criswell [Thu, 26 Feb 2004 22:20:58 +0000 (22:20 +0000)]
Fixes for PR258 and PR259.
Functions with linkonce linkage are declared with weak linkage.
Global floating point constants used to represent unprintable values
(such as NaN and infinity) are declared static so that they don't interfere
with other CBE generated translation units.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11884
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Chris Lattner [Thu, 26 Feb 2004 22:07:22 +0000 (22:07 +0000)]
Be a good little compiler and handle direct calls efficiently, even if there
are beastly ConstantPointerRefs in the way...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11883
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Alkis Evlogimenos [Thu, 26 Feb 2004 22:00:20 +0000 (22:00 +0000)]
Uncomment assertions that register# != 0 on calls to
MRegisterInfo::is{Physical,Virtual}Register. Apply appropriate fixes
to relevant files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11882
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John Criswell [Thu, 26 Feb 2004 20:22:59 +0000 (20:22 +0000)]
Modified the default pathname for Povray.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11881
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Chris Lattner [Thu, 26 Feb 2004 20:02:23 +0000 (20:02 +0000)]
Since LLVM uses structure type equivalence, it isn't useful to keep around
multiple type names for the same structural type. Make DTE eliminate all
but one of the type names
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11879
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Chris Lattner [Thu, 26 Feb 2004 08:08:38 +0000 (08:08 +0000)]
Annotations are evil. This makes Value not derive from Annotable, which makes
all dynamically allocated LLVM values 4 bytes smaller, eliminate some vtables, and
make Value's destructor faster.
This makes Function derive from Annotation now because it is the only core LLVM
class that still has an annotation stuck onto it: MachineFunction.
MachineFunction is obviously horrible and gross (like most other annotations), but
will be the subject of refactorings later in the future. Besides many fewer
Function objects are dynamically allocated that instructions blocks, constants,
types, etc... :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11878
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Chris Lattner [Thu, 26 Feb 2004 08:02:57 +0000 (08:02 +0000)]
add note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11876
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Chris Lattner [Thu, 26 Feb 2004 08:02:17 +0000 (08:02 +0000)]
Use a map instead of annotations
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11875
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Chris Lattner [Thu, 26 Feb 2004 08:01:57 +0000 (08:01 +0000)]
Make TargetData no longer use annotations!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11874
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Chris Lattner [Thu, 26 Feb 2004 08:01:30 +0000 (08:01 +0000)]
Eliminate copy-and-paste comments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11873
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Chris Lattner [Thu, 26 Feb 2004 07:59:22 +0000 (07:59 +0000)]
remove obsolete comment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11872
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Chris Lattner [Thu, 26 Feb 2004 07:24:18 +0000 (07:24 +0000)]
Make sure that at least one virtual method is defined in a .cpp file to avoid
having the compiler emit RTTI and vtables to EVERY translation unit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11871
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Chris Lattner [Thu, 26 Feb 2004 07:13:46 +0000 (07:13 +0000)]
turn things like:
if (X == 0 || X == 2)
...where the comparisons and branches are in different blocks... into a switch
instruction. This comes up a lot in various programs, and works well with
the switch/switch merging code I checked earlier. For example, this testcase:
int switchtest(int C) {
return C == 0 ? f(123) :
C == 1 ? f(3123) :
C == 4 ? f(312) :
C == 5 ? f(1234): f(444);
}
is converted into this:
switch int %C, label %cond_false.3 [
int 0, label %cond_true.0
int 1, label %cond_true.1
int 4, label %cond_true.2
int 5, label %cond_true.3
]
instead of a whole bunch of conditional branches.
Admittedly the code is ugly, and incomplete. To be complete, we need to add
br -> switch merging and switch -> br merging. For example, this testcase:
struct foo { int Q, R, Z; };
#define A (X->Q+X->R * 123)
int test(struct foo *X) {
return A == 123 ? X1() :
A == 12321 ? X2():
(A == 111 || A == 222) ? X3() :
A == 875 ? X4() : X5();
}
Gets compiled to this:
switch int %tmp.7, label %cond_false.2 [
int 123, label %cond_true.0
int 12321, label %cond_true.1
int 111, label %cond_true.2
int 222, label %cond_true.2
]
...
cond_false.2: ; preds = %entry
%tmp.52 = seteq int %tmp.7, 875 ; <bool> [#uses=1]
br bool %tmp.52, label %cond_true.3, label %cond_false.3
where the branch could be folded into the switch.
This kind of thing occurs *ALL OF THE TIME*, especially in programs like
176.gcc, which is a horrible mess of code. It contains stuff like *shudder*:
#define SWITCH_TAKES_ARG(CHAR) \
( (CHAR) == 'D' \
|| (CHAR) == 'U' \
|| (CHAR) == 'o' \
|| (CHAR) == 'e' \
|| (CHAR) == 'u' \
|| (CHAR) == 'I' \
|| (CHAR) == 'm' \
|| (CHAR) == 'L' \
|| (CHAR) == 'A' \
|| (CHAR) == 'h' \
|| (CHAR) == 'z')
and
#define CONST_OK_FOR_LETTER_P(VALUE, C) \
((C) == 'I' ? SMALL_INTVAL (VALUE) \
: (C) == 'J' ? SMALL_INTVAL (-(VALUE)) \
: (C) == 'K' ? (unsigned)(VALUE) < 32 \
: (C) == 'L' ? ((VALUE) & 0xffff) == 0 \
: (C) == 'M' ? integer_ok_for_set (VALUE) \
: (C) == 'N' ? (VALUE) < 0 \
: (C) == 'O' ? (VALUE) == 0 \
: (C) == 'P' ? (VALUE) >= 0 \
: 0)
and
#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
{ \
if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 1))) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
copy_to_mode_reg (SImode, XEXP (X, 1))); \
if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 0))) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 1), \
copy_to_mode_reg (SImode, XEXP (X, 0))); \
if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == MULT) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 1), \
force_operand (XEXP (X, 0), 0)); \
if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == MULT) \
(X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
force_operand (XEXP (X, 1), 0)); \
if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == PLUS) \
(X) = gen_rtx (PLUS, Pmode, force_operand (XEXP (X, 0), NULL_RTX),\
XEXP (X, 1)); \
if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == PLUS) \
(X) = gen_rtx (PLUS, Pmode, XEXP (X, 0), \
force_operand (XEXP (X, 1), NULL_RTX)); \
if (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == CONST \
|| GET_CODE (X) == LABEL_REF) \
(X) = legitimize_address (flag_pic, X, 0, 0); \
if (memory_address_p (MODE, X)) \
goto WIN; }
and others. These macros get used multiple times of course. These are such
lovely candidates for macros, aren't they? :)
This code also nicely handles LLVM constructs that look like this:
if (isa<CastInst>(I))
...
else if (isa<BranchInst>(I))
...
else if (isa<SetCondInst>(I))
...
else if (isa<UnwindInst>(I))
...
else if (isa<VAArgInst>(I))
...
where the isa can obviously be a dyn_cast as well. Switch instructions are a
good thing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11870
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Chris Lattner [Thu, 26 Feb 2004 05:21:21 +0000 (05:21 +0000)]
No need to clear the map here, it will always be empty
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11868
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Chris Lattner [Thu, 26 Feb 2004 05:00:15 +0000 (05:00 +0000)]
Fix a bug in the densemap that was killing the local allocator, and probably
other clients. The problem is that the nullVal member was left to the default
constructor to initialize, which for int's does nothing (ie, leaves it unspecified).
To get a zero value, we must use T(). It's C++ wonderful? :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11867
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Alkis Evlogimenos [Thu, 26 Feb 2004 04:14:10 +0000 (04:14 +0000)]
Remove .micro references as those files no longer exist and add some more recent Makefile additions to the list
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11866
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Chris Lattner [Thu, 26 Feb 2004 04:07:12 +0000 (04:07 +0000)]
Fix typeo. grow() cannot shrink storage. clear() should really nuke storage
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11865
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Chris Lattner [Thu, 26 Feb 2004 03:45:03 +0000 (03:45 +0000)]
Fix typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11864
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Chris Lattner [Thu, 26 Feb 2004 03:43:43 +0000 (03:43 +0000)]
The node doesn't have to be _no_ node flags, it just has to be complete and
not have any globals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11863
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Chris Lattner [Thu, 26 Feb 2004 03:43:08 +0000 (03:43 +0000)]
Add _more_ functions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11862
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Chris Lattner [Thu, 26 Feb 2004 03:34:30 +0000 (03:34 +0000)]
We have this snazzy link-time optimizer. How about we start using it? This
removes some cruft from 255.vortex, cleaning up after DAE and IPCP, which
do horrible, beautiful, things to vortex.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11861
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Chris Lattner [Thu, 26 Feb 2004 01:20:02 +0000 (01:20 +0000)]
Fix some warnings, some of which were spurious, and some of which were real
bugs. Thanks Brian!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11859
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Misha Brukman [Thu, 26 Feb 2004 00:37:12 +0000 (00:37 +0000)]
Instructions to call and return from functions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11858
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Brian Gaeke [Thu, 26 Feb 2004 00:08:25 +0000 (00:08 +0000)]
One B00g fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11857
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Alkis Evlogimenos [Wed, 25 Feb 2004 23:56:36 +0000 (23:56 +0000)]
Temporarily comment out asserts as they break things. I will uncomment
them when all the problem areas are fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11855
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Alkis Evlogimenos [Wed, 25 Feb 2004 23:47:17 +0000 (23:47 +0000)]
Fix typo. I wonder how this actually worked.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11854
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