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Constants.cpp: Only read 32 bits for float.

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Otherwise we'll discard the wrong half of a uint64_t on big-endian systems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230016 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2015-02-20 15:11:55 +00:00
parent bb19cd98c6
commit 5c251169cd
1 changed files with 6 additions and 3 deletions
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9
lib/IR/Constants.cpp
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@ -2715,17 +2715,20 @@ uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
/// type, return the specified element as an APFloat. /// type, return the specified element as an APFloat.
APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const { APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
const char *EltPtr = getElementPointer(Elt); const char *EltPtr = getElementPointer(Elt);
auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
switch (getElementType()->getTypeID()) { switch (getElementType()->getTypeID()) {
default: default:
llvm_unreachable("Accessor can only be used when element is float/double!"); llvm_unreachable("Accessor can only be used when element is float/double!");
case Type::FloatTyID: case Type::FloatTyID: {
auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
return APFloat(APFloat::IEEEsingle, APInt(32, EltVal)); return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
case Type::DoubleTyID: }
case Type::DoubleTyID: {
auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
return APFloat(APFloat::IEEEdouble, APInt(64, EltVal)); return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
} }
} }
}
/// getElementAsFloat - If this is an sequential container of floats, return /// getElementAsFloat - If this is an sequential container of floats, return
/// the specified element as a float. /// the specified element as a float.