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don't violate C TBAA rules, use FloatToBits instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45076 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -153,33 +153,25 @@ def hi16 : PatLeaf<(imm), [{
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// Transform a float, returning the high 16 bits shifted down, as if
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// the float was really an unsigned integer:
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def HI16_f32 : SDNodeXForm<fpimm, [{
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const APFloat &apf = N->getValueAPF();
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float fval = apf.convertToFloat();
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unsigned val = *((unsigned *) &fval);
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return getI32Imm(val >> 16);
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float fval = N->getValueAPF().convertToFloat();
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return getI32Imm(FloatToBits(fval) >> 16);
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}]>;
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// Transformation function on floats: get the low 16 bits as if the float was
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// an unsigned integer.
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def LO16_f32 : SDNodeXForm<fpimm, [{
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const APFloat &apf = N->getValueAPF();
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float fval = apf.convertToFloat();
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unsigned val = *((unsigned *) &fval);
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return getI32Imm(val & 0xffff);
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float fval = N->getValueAPF().convertToFloat();
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return getI32Imm(FloatToBits(fval) & 0xffff);
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}]>;
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def FPimm_sext16 : SDNodeXForm<fpimm, [{
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const APFloat &apf = N->getValueAPF();
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float fval = apf.convertToFloat();
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unsigned val = *((unsigned *) &fval);
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return getI32Imm((int) ((val << 16) >> 16));
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float fval = N->getValueAPF().convertToFloat();
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return getI32Imm((int) ((FloatToBits(fval) << 16) >> 16));
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}]>;
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def FPimm_u18 : SDNodeXForm<fpimm, [{
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const APFloat &apf = N->getValueAPF();
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float fval = apf.convertToFloat();
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unsigned val = *((unsigned *) &fval);
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return getI32Imm(val & ((1 << 19) - 1));
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float fval = N->getValueAPF().convertToFloat();
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return getI32Imm(FloatToBits(fval) & ((1 << 19) - 1));
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}]>;
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def fpimmSExt16 : PatLeaf<(fpimm), [{
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@ -190,9 +182,7 @@ def fpimmSExt16 : PatLeaf<(fpimm), [{
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// Does the SFP constant only have upp 16 bits set?
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def hi16_f32 : PatLeaf<(fpimm), [{
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if (N->getValueType(0) == MVT::f32) {
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const APFloat &apf = N->getValueAPF();
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float fval = apf.convertToFloat();
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uint32_t val = *((unsigned *) &fval);
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uint32_t val = FloatToBits(N->getValueAPF().convertToFloat());
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return ((val & 0xffff0000) == val);
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}
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@ -202,9 +192,7 @@ def hi16_f32 : PatLeaf<(fpimm), [{
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// Does the SFP constant fit into 18 bits?
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def fpimm18 : PatLeaf<(fpimm), [{
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if (N->getValueType(0) == MVT::f32) {
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const APFloat &apf = N->getValueAPF();
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float fval = apf.convertToFloat();
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uint32_t Value = *((uint32_t *) &fval);
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uint32_t Value = FloatToBits(N->getValueAPF().convertToFloat());
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return ((Value & ((1 << 19) - 1)) == Value);
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}
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