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34 Commits

Author SHA1 Message Date
Benjamin Kramer eaff66a895 Revert 122959, it needs more thought. Add it back to README.txt with additional notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123030 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-07 20:42:20 +00:00
Benjamin Kramer 8143a84c46 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122961 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-06 14:22:52 +00:00
Benjamin Kramer 240d42d185 InstCombine: If we call llvm.objectsize on a malloc call we can replace it with the size passed to malloc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122959 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-06 13:11:05 +00:00
Benjamin Kramer 783a5c2b69 InstCombine: Teach llvm.objectsize folding to look through GEPs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122958 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-06 13:07:49 +00:00
Nick Lewycky a370a44a76 Fix declarations in a few more tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101676 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-17 21:29:25 +00:00
Eric Christopher 67a71b5306 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101011 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-12 04:48:00 +00:00
Mon P Wang 20adc9dc46 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)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100304 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-04 03:10:48 +00:00
Mon P Wang e754d3fb85 Revert r100191 since it breaks objc in clang 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100199 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-02 18:43:02 +00:00
Mon P Wang e33c848fa4 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)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100191 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-02 18:04:15 +00:00
Bob Wilson 100f090add Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99948 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-30 22:27:04 +00:00
Mon P Wang 808bab0169 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99928 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-30 20:55:56 +00:00
Evan Cheng 9d8f002d8f Fix an incorrect logic causing instcombine to miss some _chk -> non-chk transformations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99263 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-23 06:06:09 +00:00
Evan Cheng 687fed3530 Re-commit 97860 with fix. getMallocAllocatedType may return null. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98000 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-08 22:54:36 +00:00
Eric Christopher 27ceaa13f8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97875 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-06 10:50:38 +00:00
Eric Christopher 75f0d6953a 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97866 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-06 03:11:35 +00:00
Evan Cheng fc8ccfedbb Transform @llvm.objectsize to integer if the argument is a result of malloc of known size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97860 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-06 01:01:42 +00:00
Evan Cheng a862326bc7 Instcombine should turn llvm.objectsize of a alloca with static size to an integer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97827 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-05 20:47:23 +00:00
Dan Gohman 3a9fd8064a LLVM instruction syntax doesn't have trailing semicolons. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97456 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-01 17:53:15 +00:00
Evan Cheng 6e5dfd4bf5 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96825 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-22 23:34:00 +00:00
Eric Christopher 77ffe3b31e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96134 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 23:38:01 +00:00
Eric Christopher dfdddd8ed6 Make sure that ConstantExpr offsets also aren't off of extern 
symbols.

Thanks to Duncan Sands for the testcase!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95877 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-11 17:44:04 +00:00
Eric Christopher 26d0e892e3 Add ConstantExpr handling to Intrinsic::objectsize lowering. 
Update testcase accordingly now that we can optimize another
section.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95846 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-11 01:48:54 +00:00
Eric Christopher 415326b4ed Move Intrinsic::objectsize lowering back to InstCombineCalls and 
enable constant 0 offset lowering.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95691 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-09 21:24:27 +00:00
Eric Christopher d2592ff69b Pull these back out, they're a little too aggressive and time 
consuming for a simple optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95671 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-09 17:29:18 +00:00
Eric Christopher 1926b648e1 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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95628 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-09 00:35:38 +00:00
Eric Christopher 724bea90b0 Remove this code for now. I have a better idea and will rewrite with 
that in mind.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95402 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-05 19:04:06 +00:00
Eric Christopher e7b97471f8 Temporarily revert this since it appears to have caused a build 
failure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95294 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-04 06:41:27 +00:00
Eric Christopher ea4b6dfd8f 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95283 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-04 02:55:34 +00:00
Eric Christopher ec5ef6d8b0 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95266 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-03 23:56:07 +00:00
Eric Christopher 0c6a8f9eda Recommit this, looks like it wasn't the cause. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95165 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-03 00:21:58 +00:00
Eric Christopher 9f34dd305b Hopefully temporarily revert this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95154 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-02 23:01:31 +00:00
Eric Christopher a6a089cd24 Re-add strcmp and known size object size checking optimization. 
Passed bootstrap and nightly test run here.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95145 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-02 22:10:43 +00:00
Eric Christopher 36664bfc7a Revert my last couple of patches. They appear to have broken bison. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94841 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-29 21:16:24 +00:00
Eric Christopher 949124ce0f 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94775 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-29 01:09:57 +00:00