[llvm-branch-commits] [llvm-branch] r130978 - in /llvm/branches/Apple/Morbo: ./ lib/Transforms/InstCombine/InstCombineCalls.cpp test/Transforms/InstCombine/strcpy_chk-64.ll
Eric Christopher
echristo at apple.com
Thu May 5 23:11:58 PDT 2011
Author: echristo
Date: Fri May 6 01:11:58 2011
New Revision: 130978
URL: http://llvm.org/viewvc/llvm-project?rev=130978&view=rev
Log:
Merge r127636 from mainline.
Part of rdar://9123638
Added:
llvm/branches/Apple/Morbo/test/Transforms/InstCombine/strcpy_chk-64.ll
- copied unchanged from r127636, llvm/trunk/test/Transforms/InstCombine/strcpy_chk-64.ll
Modified:
llvm/branches/Apple/Morbo/ (props changed)
llvm/branches/Apple/Morbo/lib/Transforms/InstCombine/InstCombineCalls.cpp
Propchange: llvm/branches/Apple/Morbo/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Fri May 6 01:11:58 2011
@@ -1,3 +1,3 @@
/llvm/branches/Apple/Hermes:96832,96835,96858,96870,96876,96879,104427,104930,104971
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/llvm-gcc-4.2/trunk:104182
Modified: llvm/branches/Apple/Morbo/lib/Transforms/InstCombine/InstCombineCalls.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Morbo/lib/Transforms/InstCombine/InstCombineCalls.cpp?rev=130978&r1=130977&r2=130978&view=diff
==============================================================================
--- llvm/branches/Apple/Morbo/lib/Transforms/InstCombine/InstCombineCalls.cpp (original)
+++ llvm/branches/Apple/Morbo/lib/Transforms/InstCombine/InstCombineCalls.cpp Fri May 6 01:11:58 2011
@@ -769,12 +769,17 @@
NewInstruction = IC->ReplaceInstUsesWith(*CI, With);
}
bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp, bool isString) const {
- if (ConstantInt *SizeCI = dyn_cast<ConstantInt>(CI->getOperand(SizeCIOp))) {
+ if (ConstantInt *SizeCI =
+ dyn_cast<ConstantInt>(CI->getOperand(SizeCIOp))) {
if (SizeCI->isAllOnesValue())
return true;
- if (isString)
- return SizeCI->getZExtValue() >=
- GetStringLength(CI->getOperand(SizeArgOp));
+ if (isString) {
+ uint64_t Len = GetStringLength(CI->getArgOperand(SizeArgOp));
+ // If the length is 0 we don't know how long it is and so we can't
+ // remove the check.
+ if (Len == 0) return false;
+ return SizeCI->getZExtValue() >= Len;
+ }
if (ConstantInt *Arg = dyn_cast<ConstantInt>(CI->getOperand(SizeArgOp)))
return SizeCI->getZExtValue() >= Arg->getZExtValue();
}
@@ -1276,4 +1281,3 @@
CS.setCalledFunction(NewCallee);
return CS.getInstruction();
}
-
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