diff options
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.def | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/lib/Target/X86/X86InstrInfo.def b/lib/Target/X86/X86InstrInfo.def index df8a79bf8b..5121f5d1c3 100644 --- a/lib/Target/X86/X86InstrInfo.def +++ b/lib/Target/X86/X86InstrInfo.def @@ -72,12 +72,25 @@ I(NOOP , "nop", 0x90, 0, X86II::RawFrm | X86II::Void, NoIR, // instruction turns into a noop, but if the frame pointer is retained, this // turns into a 'sub ESP, <amount>'. // -I(ADJCALLSTACKDOWN, "adjcallstackdown", 0, 0, X86II::Pseudo, NoIR, NoIR) +I(ADJCALLSTACKDOWN, "adjcallstackdown", 0, 0, X86II::Pseudo, NoIR, NoIR) // This instruction is used to mark readjustment of the stack after a function // call. If the frame pointer is retained, this becomes a 'add ESP, <amount>' // instruction after the call. -I(ADJCALLSTACKUP , "adjcallstackup" , 0, 0, X86II::Pseudo, NoIR, NoIR) +I(ADJCALLSTACKUP , "adjcallstackup" , 0, 0, X86II::Pseudo, NoIR, NoIR) + +// This pseudo-instruction is used to record implicit definitions of physical +// registers: registers that are live on input to the function (currently just +// the stack pointer, eventually could include arguments passed in registers). +// +I(IMPLICIT_DEF, "implicit_def", 0, 0, X86II::Pseudo, NoIR, NoIR) + +// This pseudo-instruction is used to record implicit uses of physical registers +// at the end of the function. This ensures that bad things aren't done to +// registes that are live on exit from the function (for example, EAX). +// +I(IMPLICIT_USE, "implicit_use", 0, 0, X86II::Pseudo, NoIR, NoIR) + // Flow control instructions I(RET , "ret", 0xC3, M_RET_FLAG | M_TERMINATOR_FLAG, X86II::RawFrm | X86II::Void, NoIR, NoIR) // ret |