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x86: Remove the W64ALLOCA pseudo

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This is just an alias for CALL64pcrel32, and we can just use that opcode
with explicit defs in the MI.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner 2015-01-29 23:09:37 +00:00
parent 4ac4c33f2d
commit 850420cd14
3 changed files with 3 additions and 15 deletions
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2
lib/Target/X86/X86FrameLowering.cpp
View File

@ -415,7 +415,7 @@ void X86FrameLowering::getStackProbeFunction(const MachineFunction &MF,
if (STI.is64Bit())
CallOp = MF.getTarget().getCodeModel() == CodeModel::Large
? X86::CALL64r
: X86::W64ALLOCA;
: X86::CALL64pcrel32;
else
CallOp = X86::CALLpcrel32;

4
lib/Target/X86/X86ISelLowering.cpp
View File

@ -21070,7 +21070,7 @@ X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
// ___chkstk(Mingw64):
// Clobbers R10, R11, RAX and EFLAGS.
// Updates RSP.
BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
BuildMI(*BB, MI, DL, TII->get(X86::CALL64pcrel32))
.addExternalSymbol("___chkstk")
.addReg(X86::RAX, RegState::Implicit)
.addReg(X86::RSP, RegState::Implicit)
@ -21080,7 +21080,7 @@ X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
} else {
// __chkstk(MSVCRT): does not update stack pointer.
// Clobbers R10, R11 and EFLAGS.
BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
BuildMI(*BB, MI, DL, TII->get(X86::CALL64pcrel32))
.addExternalSymbol("__chkstk")
.addReg(X86::RAX, RegState::Implicit)
.addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);

12
lib/Target/X86/X86InstrControl.td
View File

@ -278,18 +278,6 @@ let isCall = 1, Uses = [RSP], SchedRW = [WriteJump] in {
"lcall{q}\t{*}$dst", [], IIC_CALL_FAR_MEM>;
}
let isCall = 1, isCodeGenOnly = 1 in
// __chkstk(MSVC): clobber R10, R11 and EFLAGS
// ___chkstk_ms(Mingw64): clobber R10, R11 and EFLAGS
// ___chkstk(Mingw64): clobber R10, R11, RAX and EFLAGS, and update RSP.
let Defs = [RAX, R10, R11, RSP, EFLAGS],
Uses = [RSP] in {
def W64ALLOCA : Ii32PCRel<0xE8, RawFrm,
(outs), (ins i64i32imm_pcrel:$dst),
"call{q}\t$dst", [], IIC_CALL_RI>,
Requires<[IsWin64]>, Sched<[WriteJump]>;
}
let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1,
isCodeGenOnly = 1, Uses = [RSP], usesCustomInserter = 1,
SchedRW = [WriteJump] in {