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35 Commits

Author SHA1 Message Date
Chris Lattner 5756c16cdf make the asmparser reject function and type redefinitions. 'Merging' hasn't been 
needed since llvm-gcc 3.4 days.

llvm-svn: 133248
 2011-06-17 07:06:44 +00:00
Benjamin Kramer 134cde912a Revert 122959, it needs more thought. Add it back to README.txt with additional notes. 
llvm-svn: 123030
 2011-01-07 20:42:20 +00:00
Benjamin Kramer ae67cc13a9 InstCombine: Turn _chk functions into the "unsafe" variant if length and max langth are equal. 
This happens when we take the (non-constant) length from a malloc.

llvm-svn: 122961
 2011-01-06 14:22:52 +00:00
Benjamin Kramer 799b011276 InstCombine: If we call llvm.objectsize on a malloc call we can replace it with the size passed to malloc. 
llvm-svn: 122959
 2011-01-06 13:11:05 +00:00
Benjamin Kramer a76cc117e0 InstCombine: Teach llvm.objectsize folding to look through GEPs. 
llvm-svn: 122958
 2011-01-06 13:07:49 +00:00
Nick Lewycky fbe8d2803d Fix declarations in a few more tests. 
llvm-svn: 101676
 2010-04-17 21:29:25 +00:00
Eric Christopher 1f272f7fd8 Verify function prototypes before trying to optimize functions. We also 
need TargetData, just return false if we don't have it.

Update testcases accordingly.

Fixes PR6807.

llvm-svn: 101011
 2010-04-12 04:48:00 +00:00
Mon P Wang c576ee9040 Reapply address space patch after fixing an issue in MemCopyOptimizer. 
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)

llvm-svn: 100304
 2010-04-04 03:10:48 +00:00
Mon P Wang 999c1b927b Revert r100191 since it breaks objc in clang 
llvm-svn: 100199
 2010-04-02 18:43:02 +00:00
Mon P Wang a972ab8564 Reapply address space patch after fixing an issue in MemCopyOptimizer. 
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)

llvm-svn: 100191
 2010-04-02 18:04:15 +00:00
Bob Wilson 6f7fd28824 Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots. 
llvm-svn: 99948
 2010-03-30 22:27:04 +00:00
Mon P Wang 7460571381 Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset, 
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
A update of langref will occur in a subsequent checkin.

llvm-svn: 99928
 2010-03-30 20:55:56 +00:00
Evan Cheng 3f7842232e Fix an incorrect logic causing instcombine to miss some _chk -> non-chk transformations. 
llvm-svn: 99263
 2010-03-23 06:06:09 +00:00
Evan Cheng 4f2fd2d2be Re-commit 97860 with fix. getMallocAllocatedType may return null. 
llvm-svn: 98000
 2010-03-08 22:54:36 +00:00
Eric Christopher a7fb58f5f5 Migrate _chk call lowering from SimplifyLibCalls to InstCombine. Stub 
out the remainder of the calls that we should lower in some way and
move the tests to the new correct directory. Fix up tests that are now
optimized more than they were before by -instcombine.

llvm-svn: 97875
 2010-03-06 10:50:38 +00:00
Eric Christopher d8b43d0e59 Temporarily revert: 
Log:
Transform @llvm.objectsize to integer if the argument is a result of malloc of known size.

Modified:
   llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
   llvm/trunk/test/Transforms/InstCombine/objsize.ll

It appears to be causing swb and nightly test failures.

llvm-svn: 97866
 2010-03-06 03:11:35 +00:00
Evan Cheng afdc7d3aab Transform @llvm.objectsize to integer if the argument is a result of malloc of known size. 
llvm-svn: 97860
 2010-03-06 01:01:42 +00:00
Evan Cheng fffdad58ac Instcombine should turn llvm.objectsize of a alloca with static size to an integer. 
llvm-svn: 97827
 2010-03-05 20:47:23 +00:00
Dan Gohman 882c95605f LLVM instruction syntax doesn't have trailing semicolons. 
llvm-svn: 97456
 2010-03-01 17:53:15 +00:00
Evan Cheng 3688b8fa68 Instcombine constant folding can normalize gep with negative index to index with large offset. When instcombine objsize checking transformation sees these geps where the offset seemingly point out of bound, it should just return "i don't know" rather than asserting. 
llvm-svn: 96825
 2010-02-22 23:34:00 +00:00
Eric Christopher 843a4cc43c Fix a problem where we had bitcasted operands that gave us 
odd offsets since the bitcasted pointer size and the offset pointer
size are going to be different types for the GEP vs base object.

llvm-svn: 96134
 2010-02-13 23:38:01 +00:00
Eric Christopher cccdc13662 Make sure that ConstantExpr offsets also aren't off of extern 
symbols.

Thanks to Duncan Sands for the testcase!

llvm-svn: 95877
 2010-02-11 17:44:04 +00:00
Eric Christopher 531ea566a6 Add ConstantExpr handling to Intrinsic::objectsize lowering. 
Update testcase accordingly now that we can optimize another
section.

llvm-svn: 95846
 2010-02-11 01:48:54 +00:00
Eric Christopher 7b7028fd24 Move Intrinsic::objectsize lowering back to InstCombineCalls and 
enable constant 0 offset lowering.

llvm-svn: 95691
 2010-02-09 21:24:27 +00:00
Eric Christopher ad1aa86276 Pull these back out, they're a little too aggressive and time 
consuming for a simple optimization.

llvm-svn: 95671
 2010-02-09 17:29:18 +00:00
Eric Christopher 9f85e7eb16 Add a new pass to do llvm.objsize lowering using SCEV. 
Initial skeleton and SCEVUnknown lowering implemented,
the rest should come relatively quickly.  Move testcase
to new directory.

Move pass to right before SimplifyLibCalls - which is
moved down a bit so we can take advantage of a few opts.

llvm-svn: 95628
 2010-02-09 00:35:38 +00:00
Eric Christopher 04371b4f12 Remove this code for now. I have a better idea and will rewrite with 
that in mind.

llvm-svn: 95402
 2010-02-05 19:04:06 +00:00
Eric Christopher 107a1fbf61 Temporarily revert this since it appears to have caused a build 
failure.

llvm-svn: 95294
 2010-02-04 06:41:27 +00:00
Eric Christopher 42fa84a880 Rework constant expr and array handling for objectsize instcombining. 
Fix bugs where we would compute out of bounds as in bounds, and where
we couldn't know that the linker could override the size of an array.

Add a few new testcases, change existing testcase to use a private
global array instead of extern.

llvm-svn: 95283
 2010-02-04 02:55:34 +00:00
Eric Christopher f12e18db21 If we're dealing with a zero-length array, don't lower to any 
particular size, we just don't know what the length is yet.

llvm-svn: 95266
 2010-02-03 23:56:07 +00:00
Eric Christopher d86233c118 Recommit this, looks like it wasn't the cause. 
llvm-svn: 95165
 2010-02-03 00:21:58 +00:00
Eric Christopher e67d01a9a8 Hopefully temporarily revert this. 
llvm-svn: 95154
 2010-02-02 23:01:31 +00:00
Eric Christopher 4264e7e46f Re-add strcmp and known size object size checking optimization. 
Passed bootstrap and nightly test run here.

llvm-svn: 95145
 2010-02-02 22:10:43 +00:00
Eric Christopher 5a0e174863 Revert my last couple of patches. They appear to have broken bison. 
llvm-svn: 94841
 2010-01-29 21:16:24 +00:00
Eric Christopher 997f7ca8c5 Add constant support to object size handling and remove default 
lowering. We'll either figure it out, or not and be lowered by
SelectionDAGBuild.

Add test.

llvm-svn: 94775
 2010-01-29 01:09:57 +00:00