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Mark X86::RET and RETI instructions as variadic.

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There is special magic happening when returning floating point values on
the x87 stack. The RET instructions get extra f80 operands.

llvm-svn: 162592
This commit is contained in:
Jakob Stoklund Olesen 2012-08-24 20:52:44 +00:00
parent db731c47f0
commit 9ebe947bb0
1 changed files with 5 additions and 2 deletions
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7
lib/Target/X86/X86InstrControl.td
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@ -16,15 +16,18 @@
//
// Return instructions.
//
// The X86retflag return instructions are variadic because we may add ST0 and
// ST1 arguments when returning values on the x87 stack.
let isTerminator = 1, isReturn = 1, isBarrier = 1,
hasCtrlDep = 1, FPForm = SpecialFP in {
def RET : I <0xC3, RawFrm, (outs), (ins),
def RET : I <0xC3, RawFrm, (outs), (ins variable_ops),
"ret",
[(X86retflag 0)], IIC_RET>;
def RETW : I <0xC3, RawFrm, (outs), (ins),
"ret{w}",
[], IIC_RET>, OpSize;
def RETI : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt),
def RETI : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt, variable_ops),
"ret\t$amt",
[(X86retflag timm:$amt)], IIC_RET_IMM>;
def RETIW : Ii16<0xC2, RawFrm, (outs), (ins i16imm:$amt),