Remove RSTRegClass case from loadRegFromStackSlot
and storeRegToStackSlot. Evan and I concluded this should never be needed and it appears to be true. (It if is needed, adjustment would be needed for long double to work.) llvm-svn: 42049
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@ -608,7 +608,7 @@ void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
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// If we have one _and_ we don't want to pop the operand, duplicate the value
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// on the stack instead of moving it. This ensure that popping the value is
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// always ok.
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// Ditto FISTTP16m, FISTTP32m, FISTTP64m.
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// Ditto FISTTP16m, FISTTP32m, FISTTP64m, ST_FpP80m.
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//
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if (!KillsSrc &&
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(MI->getOpcode() == X86::IST_Fp64m32 ||
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@ -170,9 +170,7 @@ void X86RegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
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Opc = X86::MOV16_mr;
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} else if (RC == &X86::RFP80RegClass) {
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Opc = X86::ST_FpP80m; // pops
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} else if (RC == &X86::RFP64RegClass || RC == &X86::RSTRegClass) {
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/// FIXME spilling long double values as 64 bit does not work.
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/// We need RST80, unfortunately.
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} else if (RC == &X86::RFP64RegClass) {
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Opc = X86::ST_Fp64m;
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} else if (RC == &X86::RFP32RegClass) {
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Opc = X86::ST_Fp32m;
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@ -211,7 +209,7 @@ void X86RegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
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Opc = X86::MOV16_rm;
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} else if (RC == &X86::RFP80RegClass) {
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Opc = X86::LD_Fp80m;
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} else if (RC == &X86::RFP64RegClass || RC == &X86::RSTRegClass) {
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} else if (RC == &X86::RFP64RegClass) {
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Opc = X86::LD_Fp64m;
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} else if (RC == &X86::RFP32RegClass) {
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Opc = X86::LD_Fp32m;
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