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Implicit def instructions, e.g. X86::IMPLICIT_DEF_GR32, are always re-materializable and they should not be spilled.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44960 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-12-12 23:12:09 +00:00
parent 67f1c493d1
commit 6e141fd048
15 changed files with 724 additions and 12 deletions
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2
lib/Target/PowerPC/PPCInstrInfo.td
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@@ -334,6 +334,7 @@ def DYNALLOC : Pseudo<(outs GPRC:$result), (ins GPRC:$negsize, memri:$fpsi),
[(set GPRC:$result,
(PPCdynalloc GPRC:$negsize, iaddr:$fpsi))]>;
let isImplicitDef = 1 in {
def IMPLICIT_DEF_GPRC: Pseudo<(outs GPRC:$rD), (ins),
"${:comment}IMPLICIT_DEF_GPRC $rD",
[(set GPRC:$rD, (undef))]>;
@@ -343,6 +344,7 @@ def IMPLICIT_DEF_F8 : Pseudo<(outs F8RC:$rD), (ins),
def IMPLICIT_DEF_F4 : Pseudo<(outs F4RC:$rD), (ins),
"${:comment} IMPLICIT_DEF_F4 $rD",
[(set F4RC:$rD, (undef))]>;
}
// SELECT_CC_* - Used to implement the SELECT_CC DAG operation. Expanded by the
// scheduler into a branch sequence.