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Do for GR16_NOREX what r69049 did for GR8_NOREX, to avoid trouble with

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the local register allocator.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69115 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-04-15 00:10:16 +00:00
parent af5b6bb6a5
commit aaa1fdb271
1 changed files with 35 additions and 0 deletions
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35
lib/Target/X86/X86RegisterInfo.td
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@ -537,6 +537,41 @@ def GR8_NOREX : RegisterClass<"X86", [i8], 8,
def GR16_NOREX : RegisterClass<"X86", [i16], 16,
[AX, CX, DX, SI, DI, BX, BP, SP]> {
let SubRegClassList = [GR8_NOREX, GR8_NOREX];
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
// Does the function dedicate RBP / EBP to being a frame ptr?
// If so, don't allocate SP or BP.
static const unsigned X86_GR16_AO_fp[] = {
X86::AX, X86::CX, X86::DX, X86::SI, X86::DI, X86::BX
};
// If not, just don't allocate SP.
static const unsigned X86_GR16_AO[] = {
X86::AX, X86::CX, X86::DX, X86::SI, X86::DI, X86::BX, X86::BP
};
GR16_NOREXClass::iterator
GR16_NOREXClass::allocation_order_begin(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const TargetRegisterInfo *RI = TM.getRegisterInfo();
if (RI->hasFP(MF))
return X86_GR16_AO_fp;
else
return X86_GR16_AO;
}
GR16_NOREXClass::iterator
GR16_NOREXClass::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const TargetRegisterInfo *RI = TM.getRegisterInfo();
if (RI->hasFP(MF))
return X86_GR16_AO_fp+(sizeof(X86_GR16_AO_fp)/sizeof(unsigned));
else
return X86_GR16_AO + (sizeof(X86_GR16_AO) / sizeof(unsigned));
}
}];
}
// GR32_NOREX - GR32 registers which do not require a REX prefix.
def GR32_NOREX : RegisterClass<"X86", [i32], 32,