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fix PR8867: a crash handling fp128. Thanks to Nick for the testcase.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122613 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-12-29 01:33:36 +00:00
parent b4601bd2ff
commit e562dba845
2 changed files with 10 additions and 1 deletions
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2
lib/VMCore/ConstantFold.cpp
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@ -637,7 +637,7 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
case Instruction::SIToFP:
if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
APInt api = CI->getValue();
APFloat apf(APInt::getNullValue(DestTy->getPrimitiveSizeInBits()));
APFloat apf(APInt::getNullValue(DestTy->getPrimitiveSizeInBits()), true);
(void)apf.convertFromAPInt(api,
opc==Instruction::SIToFP,
APFloat::rmNearestTiesToEven);

9
unittests/VMCore/ConstantsTest.cpp
View File

@ -109,5 +109,14 @@ TEST(ConstantsTest, IntSigns) {
EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
}
TEST(ConstantsTest, FP128Test) {
const Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
const IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
Constant *Zero128 = Constant::getNullValue(Int128Ty);
Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
EXPECT_TRUE(isa<ConstantFP>(X));
}
} // end anonymous namespace
} // end namespace llvm