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Use switch on VT instead of Type* comparisons.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57551 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-10-15 04:32:45 +00:00
parent 51ccb3deba
commit 45ac17f521
1 changed files with 18 additions and 19 deletions
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37
lib/Target/X86/X86FastISel.cpp
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@ -519,36 +519,35 @@ bool X86FastISel::X86SelectLoad(Instruction *I) {
static unsigned X86ChooseCmpOpcode(MVT VT) {
switch (VT.getSimpleVT()) {
case MVT::i8: return X86::CMP8rr;
default: return 0;
case MVT::i8: return X86::CMP8rr;
case MVT::i16: return X86::CMP16rr;
case MVT::i32: return X86::CMP32rr;
case MVT::i64: return X86::CMP64rr;
case MVT::f32: return X86::UCOMISSrr;
case MVT::f64: return X86::UCOMISDrr;
default: break;
}
return 0;
}
/// X86ChooseCmpImmediateOpcode - If we have a comparison with RHS as the RHS
/// of the comparison, return an opcode that works for the compare (e.g.
/// CMP32ri) otherwise return 0.
static unsigned X86ChooseCmpImmediateOpcode(ConstantInt *RHSC) {
if (RHSC->getType() == Type::Int8Ty)
return X86::CMP8ri;
if (RHSC->getType() == Type::Int16Ty)
return X86::CMP16ri;
if (RHSC->getType() == Type::Int32Ty)
return X86::CMP32ri;
// 64-bit comparisons are only valid if the immediate fits in a 32-bit sext
// field.
if (RHSC->getType() == Type::Int64Ty &&
(int)RHSC->getSExtValue() == RHSC->getSExtValue())
return X86::CMP64ri32;
static unsigned X86ChooseCmpImmediateOpcode(MVT VT, ConstantInt *RHSC) {
switch (VT.getSimpleVT()) {
// Otherwise, we can't fold the immediate into this comparison.
return 0;
default: return 0;
case MVT::i8: return X86::CMP8ri;
case MVT::i16: return X86::CMP16ri;
case MVT::i32: return X86::CMP32ri;
case MVT::i64:
// 64-bit comparisons are only valid if the immediate fits in a 32-bit sext
// field.
if (RHSC->getType() == Type::Int64Ty &&
(int)RHSC->getSExtValue() == RHSC->getSExtValue())
return X86::CMP64ri32;
return 0;
}
}
bool X86FastISel::X86FastEmitCompare(Value *Op0, Value *Op1, MVT VT) {
@ -559,7 +558,7 @@ bool X86FastISel::X86FastEmitCompare(Value *Op0, Value *Op1, MVT VT) {
// the compare is an immediate that we can fold into this compare, use
// CMPri, otherwise use CMPrr.
if (ConstantInt *Op1C = dyn_cast<ConstantInt>(Op1)) {
if (unsigned CompareImmOpc = X86ChooseCmpImmediateOpcode(Op1C)) {
if (unsigned CompareImmOpc = X86ChooseCmpImmediateOpcode(VT, Op1C)) {
BuildMI(MBB, TII.get(CompareImmOpc)).addReg(Op0Reg)
.addImm(Op1C->getSExtValue());
return true;