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InstCombine: APFloat can't perform arithmetic on PPC double doubles, don't even try.

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Thanks Eli!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128676 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-03-31 21:35:49 +00:00
parent 0c630b5f38
commit 7ebdc37d2b
2 changed files with 13 additions and 2 deletions
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lib/Transforms/InstCombine/InstCombineCompares.cpp
+4 -2
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@@ -2769,6 +2769,10 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
if (!RHSF)
break;
// We can't convert a PPC double double.
if (RHSF->getType()->isPPC_FP128Ty())
break;
const fltSemantics *Sem;
// FIXME: This shouldn't be here.
if (LHSExt->getSrcTy()->isFloatTy())
@@ -2779,8 +2783,6 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
Sem = &APFloat::IEEEquad;
else if (LHSExt->getSrcTy()->isX86_FP80Ty())
Sem = &APFloat::x87DoubleExtended;
else if (LHSExt->getSrcTy()->isPPC_FP128Ty())
Sem = &APFloat::PPCDoubleDouble;
else
break;