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R600/SI: Add pattern for bitcasting fp immediates to integers

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The backend now assumes that all immediates are integers.  This allows
us to simplify immediate handling code, becasue we no longer need to
handle fp and integer immediates differently.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225844 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard
2015-01-13 22:59:41 +00:00
parent a28a251950
commit d90e5063ca
8 changed files with 39 additions and 56 deletions
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9
lib/Target/R600/SIShrinkInstructions.cpp
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@@ -130,7 +130,7 @@ static void foldImmediates(MachineInstr &MI, const SIInstrInfo *TII,
// Only one literal constant is allowed per instruction, so if src0 is a
// literal constant then we can't do any folding.
if ((Src0->isImm() || Src0->isFPImm()) && TII->isLiteralConstant(*Src0))
if (Src0->isImm() && TII->isLiteralConstant(*Src0))
return;
@@ -151,12 +151,6 @@ static void foldImmediates(MachineInstr &MI, const SIInstrInfo *TII,
if (MovSrc.isImm() && isUInt<32>(MovSrc.getImm())) {
Src0->ChangeToImmediate(MovSrc.getImm());
ConstantFolded = true;
} else if (MovSrc.isFPImm()) {
const ConstantFP *CFP = MovSrc.getFPImm();
if (&CFP->getValueAPF().getSemantics() == &APFloat::IEEEsingle) {
Src0->ChangeToFPImmediate(CFP);
ConstantFolded = true;
}
}
if (ConstantFolded) {
if (MRI.use_empty(Reg))
@@ -193,7 +187,6 @@ bool SIShrinkInstructions::runOnMachineFunction(MachineFunction &MF) {
if (MI.getOpcode() == AMDGPU::S_MOV_B32) {
const MachineOperand &Src = MI.getOperand(1);
// TODO: Handle FPImm?
if (Src.isImm()) {
if (isInt<16>(Src.getImm()) && !TII->isInlineConstant(Src))
MI.setDesc(TII->get(AMDGPU::S_MOVK_I32));