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Fix PR3468: a crash when constant folding a bitcast of
i80 to x86 long double (this was presumably generated by sroa). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63730 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -153,12 +153,11 @@ static Constant *FoldBitCast(Constant *V, const Type *DestTy) {
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// Integral -> Integral. This is a no-op because the bit widths must
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// be the same. Consequently, we just fold to V.
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return V;
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if (DestTy->isFloatingPoint()) {
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assert((DestTy == Type::DoubleTy || DestTy == Type::FloatTy) &&
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"Unknown FP type!");
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return ConstantFP::get(APFloat(CI->getValue()));
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}
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if (DestTy->isFloatingPoint())
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return ConstantFP::get(APFloat(CI->getValue(),
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DestTy != Type::PPC_FP128Ty));
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// Otherwise, can't fold this (vector?)
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return 0;
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}
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7
test/Transforms/InstCombine/2009-02-04-FPBitcast.ll
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7
test/Transforms/InstCombine/2009-02-04-FPBitcast.ll
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@ -0,0 +1,7 @@
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; RUN: llvm-as < %s | opt -instcombine
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; PR3468
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define x86_fp80 @cast() {
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%tmp = bitcast i80 0 to x86_fp80 ; <x86_fp80> [#uses=1]
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ret x86_fp80 %tmp
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}
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