6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-08-05 13:26:55 +00:00
Code Issues Projects Releases Wiki Activity

ConstantFoldInstOperands doesn't like compares, hand it off to instsimplify instead.

Browse Source 
Fixes PR10040.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132254 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-05-28 10:16:58 +00:00
parent d7c1086201
commit 2c5cc68874
2 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
lib/Transforms/InstCombine/InstCombineSelect.cpp
View File

@@ -298,6 +298,16 @@ static Value *SimplifyWithOpReplaced(Value *V, Value *Op, Value *RepOp,
return SimplifyBinOp(B->getOpcode(), B->getOperand(0), RepOp, TD);
}
// Same for CmpInsts.
if (CmpInst *C = dyn_cast<CmpInst>(I)) {
if (C->getOperand(0) == Op)
return SimplifyCmpInst(C->getPredicate(), RepOp, C->getOperand(1), TD);
if (C->getOperand(1) == Op)
return SimplifyCmpInst(C->getPredicate(), C->getOperand(0), RepOp, TD);
}
// TODO: We could hand off more cases to instsimplify here.
// If all operands are constant after substituting Op for RepOp then we can
// constant fold the instruction.
if (Constant *CRepOp = dyn_cast<Constant>(RepOp)) {