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Lower anyext to zext, 32-bit stuff does not have any implicit zero-extension side effects

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76035 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov
2009-07-16 14:24:41 +00:00
parent 1ada84daaf
commit 75eef89ddb
8 changed files with 183 additions and 16 deletions
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3
lib/Target/SystemZ/SystemZInstrInfo.td
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@@ -773,8 +773,7 @@ def : Pat<(SystemZpcrelwrapper tjumptable:$src), (LA64rm tjumptable:$src)>;
def : Pat<(SystemZpcrelwrapper tconstpool:$src), (LA64rm tconstpool:$src)>;
// anyext
def : Pat<(i64 (anyext GR32:$src)),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)), GR32:$src, subreg_32bit)>;
def : Pat<(i64 (anyext GR32:$src)), (MOVZX64rr32 GR32:$src)>;
// calls
def : Pat<(SystemZcall (i64 tglobaladdr:$dst)), (CALLi tglobaladdr:$dst)>;