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Allow the inverse transform x86_fp80 -> i80 (also

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fires during the Ada build).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63731 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2009-02-04 11:17:06 +00:00
parent a06aef6ec5
commit 09750273a4
2 changed files with 9 additions and 9 deletions
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13
lib/VMCore/ConstantFold.cpp
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@ -161,17 +161,12 @@ static Constant *FoldBitCast(Constant *V, const Type *DestTy) {
// Otherwise, can't fold this (vector?)
return 0;
}
// Handle ConstantFP input.
if (const ConstantFP *FP = dyn_cast<ConstantFP>(V)) {
if (const ConstantFP *FP = dyn_cast<ConstantFP>(V))
// FP -> Integral.
if (DestTy == Type::Int32Ty) {
return ConstantInt::get(FP->getValueAPF().bitcastToAPInt());
} else {
assert(DestTy == Type::Int64Ty && "only support f32/f64 for now!");
return ConstantInt::get(FP->getValueAPF().bitcastToAPInt());
}
}
return ConstantInt::get(FP->getValueAPF().bitcastToAPInt());
return 0;
}

5
test/Transforms/InstCombine/2009-02-04-FPBitcast.ll
View File

@ -5,3 +5,8 @@ define x86_fp80 @cast() {
%tmp = bitcast i80 0 to x86_fp80 ; <x86_fp80> [#uses=1]
ret x86_fp80 %tmp
}
define i80 @invcast() {
%tmp = bitcast x86_fp80 0xK00000000000000000000 to i80 ; <i80> [#uses=1]
ret i80 %tmp
}