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213 Commits

Author SHA1 Message Date
Dan Gohman
35e8a6209d Use unary + instead of a separate local variable for working 
around std::min vs static const friction.

llvm-svn: 110112
 2010-08-03 16:15:50 +00:00
Dan Gohman
d566d2c7b5 Move MaximumAlignment to be a member of the Value class. 
llvm-svn: 109891
 2010-07-30 21:07:05 +00:00
Dan Gohman
a7e5a24093 Define a maximum supported alignment value for load, store, and 
alloca instructions (constrained by their internal encoding),
and add error checking for it. Fix an instcombine bug which
generated huge alignment values (null is infinitely aligned).
This fixes undefined behavior noticed by John Regehr.

llvm-svn: 109643
 2010-07-28 20:12:04 +00:00
Dan Gohman
9cd20bf792 When user code intentionally dereferences null, the alignment of the 
dereference is theoretically infinite. Put a cap on the computed
alignment to avoid overflow, noticed by John Regehr.

llvm-svn: 109596
 2010-07-28 17:14:23 +00:00
Gabor Greif
3e44ea1917 undo 80 column trespassing I caused 
llvm-svn: 109092
 2010-07-22 10:37:47 +00:00
Gabor Greif
6d673953e3 eliminate CallInst::ArgOffset 
llvm-svn: 108522
 2010-07-16 09:38:02 +00:00
Gabor Greif
3abd881bea use getArgOperand (corrected by CallInst::ArgOffset) instead of getOperand 
llvm-svn: 107275
 2010-06-30 12:38:26 +00:00
Gabor Greif
5b1370ee80 use ArgOperand API 
llvm-svn: 107017
 2010-06-28 16:50:57 +00:00
Gabor Greif
5f3e656a1b use ArgOperand API (some hunks I could split) 
llvm-svn: 106824
 2010-06-25 07:57:14 +00:00
Gabor Greif
a6d75e2cf7 use (even more, still) ArgOperand API 
llvm-svn: 106750
 2010-06-24 15:51:11 +00:00
Gabor Greif
0a136c9b53 use (even more) ArgOperand API 
llvm-svn: 106744
 2010-06-24 13:54:33 +00:00
Gabor Greif
590d95ed18 use ArgOperand API 
llvm-svn: 106743
 2010-06-24 13:42:49 +00:00
Gabor Greif
589a0b950a use ArgOperand API 
llvm-svn: 106740
 2010-06-24 12:58:35 +00:00
Duncan Sands
f162eace49 Teach instCombine to remove malloc+free if malloc's only uses are comparisons 
to null.  Patch by Matti Niemenmaa.

llvm-svn: 104871
 2010-05-27 19:09:06 +00:00
Chris Lattner
4bd85e47bf further clarify alignment of globals, fix instcombine 
to not increase the alignment of globals with an assigned
alignment and section.

llvm-svn: 102476
 2010-04-28 00:31:12 +00:00
Gabor Greif
27b3d55194 use abstract accessors to CallInst 
llvm-svn: 101899
 2010-04-20 13:13:04 +00:00
Eric Christopher
7258dcd77f Revert 101465, it broke internal OpenGL testing. 
Probably the best way to know that all getOperand() calls have been handled
is to replace that API instead of updating.

llvm-svn: 101579
 2010-04-16 23:37:20 +00:00
Gabor Greif
f375520f7b reapply r101434 
with a fix for self-hosting

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101465
 2010-04-16 15:33:14 +00:00
Gabor Greif
403e9694f9 back out r101423 and r101397, they break llvm-gcc self-host on darwin10 
llvm-svn: 101434
 2010-04-16 01:16:20 +00:00
Gabor Greif
33ae80bff7 reapply r101364, which has been backed out in r101368 
with a fix

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101397
 2010-04-15 20:51:13 +00:00
Gabor Greif
9fd00c7d25 back out r101364, as it trips the linux nightlybot on some clang C++ tests 
llvm-svn: 101368
 2010-04-15 12:46:56 +00:00
Gabor Greif
aafd209632 rotate CallInst operands, i.e. move callee to the back 
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101364
 2010-04-15 10:49:53 +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
Gabor Greif
febf6ab718 Add a setCalledFunction member to InvokeInst (like in CallInst) 
and use this (as well as getCalledValue) to access the callee,
instead of {g|s}etOperand(0).

llvm-svn: 99084
 2010-03-20 21:00:25 +00:00
Benjamin Kramer
7b88a49f3e Factor checked library call optimization into a common helper class and use it 
to unify the almost identical code in CodeGenPrepare and InstCombineCalls.

llvm-svn: 98338
 2010-03-12 09:27:41 +00:00
Benjamin Kramer
2fc395659c stpcpy is so similar to strcpy, it doesn't deserve a complete copy of the __strcpy_chk -> strcpy code. 
llvm-svn: 98284
 2010-03-11 20:45:13 +00:00
Eric Christopher
607de1de53 Lower stpcpy_chk when possible. 
llvm-svn: 98274
 2010-03-11 19:24:34 +00:00
Eric Christopher
43dc11c525 Add strncpy libcall creator. Use it when it should be used. 
llvm-svn: 98219
 2010-03-11 01:25:07 +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
1810d77cb4 Let the fallthrough handle whether or not we've changed anything 
before we try to optimize.

llvm-svn: 97876
 2010-03-06 10:59:25 +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
Evan Cheng
43d6ff7701 Add missing break for Intrinsic::objectsize case. It was falling through to the following Intrinsic::bswap code. I have no idea why it wasn't breaking stuff. 
llvm-svn: 97774
 2010-03-05 01:22:47 +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
Duncan Sands
19d0b47b1f There are two ways of checking for a given type, for example isa<PointerType>(T) 
and T->isPointerTy().  Convert most instances of the first form to the second form.
Requested by Chris.

llvm-svn: 96344
 2010-02-16 11:11:14 +00:00
Duncan Sands
9dff9bec31 Uniformize the names of type predicates: rather than having isFloatTy and 
isInteger, we now have isFloatTy and isIntegerTy.  Requested by Chris!

llvm-svn: 96223
 2010-02-15 16:12:20 +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
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