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Second half of a fix for PR218 & test/Regression/Assembler/2004-02-01-NegativeZero.llx.
Basically we store floating point values as their integral components, instead of relying on the semantics of floating point < to differentiate between values. This is likely to make the map search be faster anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11064 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -698,15 +698,54 @@ ConstantInt *ConstantInt::get(const Type *Ty, unsigned char V) {
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//---- ConstantFP::get() implementation...
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//
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static ValueMap<double, Type, ConstantFP> FPConstants;
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namespace llvm {
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template<>
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struct ConstantCreator<ConstantFP, Type, uint64_t> {
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static ConstantFP *create(const Type *Ty, uint64_t V) {
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assert(Ty == Type::DoubleTy);
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union {
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double F;
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uint64_t I;
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} T;
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T.I = V;
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return new ConstantFP(Ty, T.F);
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}
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};
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template<>
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struct ConstantCreator<ConstantFP, Type, uint32_t> {
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static ConstantFP *create(const Type *Ty, uint32_t V) {
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assert(Ty == Type::FloatTy);
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union {
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float F;
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uint32_t I;
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} T;
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T.I = V;
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return new ConstantFP(Ty, T.F);
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}
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};
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}
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static ValueMap<uint64_t, Type, ConstantFP> DoubleConstants;
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static ValueMap<uint32_t, Type, ConstantFP> FloatConstants;
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ConstantFP *ConstantFP::get(const Type *Ty, double V) {
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if (Ty == Type::FloatTy) {
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// Force the value through memory to normalize it.
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volatile float Tmp = V;
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V = Tmp;
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union {
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float F;
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uint32_t I;
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} T;
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T.F = (float)V;
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return FloatConstants.getOrCreate(Ty, T.I);
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} else {
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assert(Ty == Type::DoubleTy);
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union {
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double F;
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uint64_t I;
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} T;
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T.F = V;
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return DoubleConstants.getOrCreate(Ty, T.I);
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}
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return FPConstants.getOrCreate(Ty, V);
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}
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//---- ConstantArray::get() implementation...
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