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Fix a dyn_cast in copyConstantToRegister which should have been a cast.

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Compactify the code that emits copies of constant ints into registers.

llvm-svn: 14365
This commit is contained in:
Brian Gaeke 2004-06-24 09:17:47 +00:00
parent 734c654e50
commit 2e0d04003c
1 changed files with 16 additions and 19 deletions
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35
lib/Target/SparcV8/InstSelectSimple.cpp
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@ -253,33 +253,30 @@ void V8ISel::copyConstantToRegister(MachineBasicBlock *MBB,
if (C->getType() == Type::BoolTy) {
Val = (C == ConstantBool::True);
} else {
ConstantInt *CI = dyn_cast<ConstantInt> (C);
ConstantInt *CI = cast<ConstantInt> (C);
Val = CI->getRawValue ();
}
switch (Class) {
case cByte:
BuildMI (*MBB, IP, V8::ORri, 2, R).addReg (V8::G0).addSImm((uint8_t)Val);
return;
case cShort: {
unsigned TmpReg = makeAnotherReg (C->getType ());
BuildMI (*MBB, IP, V8::SETHIi, 1, TmpReg)
.addSImm (((uint16_t) Val) >> 10);
BuildMI (*MBB, IP, V8::ORri, 2, R).addReg (TmpReg)
.addSImm (((uint16_t) Val) & 0x03ff);
return;
}
case cInt: {
unsigned TmpReg = makeAnotherReg (C->getType ());
BuildMI (*MBB, IP, V8::SETHIi, 1, TmpReg).addZImm(((uint32_t)Val) >> 10);
BuildMI (*MBB, IP, V8::ORri, 2, R).addReg (TmpReg)
.addSImm (((uint32_t) Val) & 0x03ff);
return;
}
case cByte: Val = (int8_t) Val; break;
case cShort: Val = (int16_t) Val; break;
case cInt: Val = (int32_t) Val; break;
default:
std::cerr << "Offending constant: " << *C << "\n";
assert (0 && "Can't copy this kind of constant into register yet");
return;
}
if (Val == 0) {
BuildMI (*MBB, IP, V8::ORrr, 2, R).addReg (V8::G0).addReg(V8::G0);
} else if (((int64_t)Val >= -4096) && ((int64_t)Val <= 4095)) {
BuildMI (*MBB, IP, V8::ORri, 2, R).addReg (V8::G0).addSImm(Val);
} else {
unsigned TmpReg = makeAnotherReg (C->getType ());
BuildMI (*MBB, IP, V8::SETHIi, 1, TmpReg)
.addSImm (((uint32_t) Val) >> 10);
BuildMI (*MBB, IP, V8::ORri, 2, R).addReg (TmpReg)
.addSImm (((uint32_t) Val) & 0x03ff);
return;
}
} else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
// We need to spill the constant to memory...
MachineConstantPool *CP = F->getConstantPool();