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| author | czhengsz <czhengsz@cn.ibm.com> | 2019-10-25 04:13:30 -0400 |
|---|---|---|
| committer | czhengsz <czhengsz@cn.ibm.com> | 2019-10-25 04:13:30 -0400 |
| commit | 822059147bf2870d88321824d41c92abb1f671d1 (patch) | |
| tree | 83461863c01b11ed1bac1c23a3d35abecfff3f63 /llvm/lib/CodeGen/LiveDebugValues.cpp | |
| parent | a6712889f5f1702dfa535718abe400d1a83174c5 (diff) | |
| download | llvm-822059147bf2870d88321824d41c92abb1f671d1.zip llvm-822059147bf2870d88321824d41c92abb1f671d1.tar.gz llvm-822059147bf2870d88321824d41c92abb1f671d1.tar.bz2 | |
[PowerPC] [Peephole] fold frame offset by using index form to save add.
renamable $x6 = ADDI8 $x1, -80 ;;; 0 is replaced with -80
renamable $x6 = ADD8 killed renamable $x6, renamable $x5
STW killed renamable $r3, 4, killed renamable $x6 :: (store 4 into %ir.14, !tbaa !2)
After PEI there is a peephole opt opportunity to combine above -80 in ADDI8 with 4 in the STW to eliminate unnecessary ADD8.
Expected result:
renamable $x6 = ADDI8 $x1, -76
STWX killed renamable $r3, renamable $x5, killed renamable $x6 :: (store 4 into %ir.6, !tbaa !2)
Reviewed by: stefanp
Differential Revision: https://reviews.llvm.org/D66329
Diffstat (limited to 'llvm/lib/CodeGen/LiveDebugValues.cpp')
0 files changed, 0 insertions, 0 deletions