6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-12 01:25:10 +00:00
Code Issues Projects Releases Wiki Activity

InstCombine: Turn _chk functions into the "unsafe" variant if length and max langth are equal.

Browse Source 
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
This commit is contained in:
Benjamin Kramer
2011-01-06 14:22:52 +00:00
parent 7d9f51f4b5
commit 8143a84c46
2 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Transforms/InstCombine/InstCombineCalls.cpp
View File

@@ -722,6 +722,8 @@ protected:
NewInstruction = IC->ReplaceInstUsesWith(*CI, With);
}
bool isFoldable(unsigned SizeCIOp, unsigned SizeArgOp, bool isString) const {
if (CI->getArgOperand(SizeCIOp) == CI->getArgOperand(SizeArgOp))
return true;
if (ConstantInt *SizeCI =
dyn_cast<ConstantInt>(CI->getArgOperand(SizeCIOp))) {
if (SizeCI->isAllOnesValue())