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| author | Evan Cheng <evan.cheng@apple.com> | 2010-05-04 20:26:52 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-05-04 20:26:52 +0000 |
| commit | afff40a62da19be15295c0f8ed5d4d450ccb45a5 (patch) | |
| tree | 0e98248c6957214da8b9a842f1e29914ca903c41 /lib/CodeGen/PHIElimination.h | |
| parent | 55cd6cb141777b1a1d64060828adafeff80b3986 (diff) | |
Teach PHI elimination to remove REG_SEQUENCE instructions and update references of the source operands with references of the destination with subreg indices. e.g.
%reg1029<def>, %reg1030<def> = VLD1q16 %reg1024<kill>, ...
%reg1031<def> = REG_SEQUENCE %reg1029<kill>, 5, %reg1030<kill>, 6
=>
%reg1031:5<def>, %reg1031:6<def> = VLD1q16 %reg1024<kill>, ...
PHI elimination now does more than phi elimination. It is really a de-SSA pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103039 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/PHIElimination.h')
| -rw-r--r-- | lib/CodeGen/PHIElimination.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/PHIElimination.h b/lib/CodeGen/PHIElimination.h index 7dedf0318a..3292aa27af 100644 --- a/lib/CodeGen/PHIElimination.h +++ b/lib/CodeGen/PHIElimination.h @@ -94,6 +94,8 @@ namespace llvm { return I; } + bool EliminateRegSequences(MachineFunction &MF); + typedef std::pair<unsigned, unsigned> BBVRegPair; typedef DenseMap<BBVRegPair, unsigned> VRegPHIUse; |