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| author | Evan Cheng <evan.cheng@apple.com> | 2012-02-23 02:58:19 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2012-02-23 02:58:19 +0000 |
| commit | f258a15bdfd63b98c33f7d14aa43c7d3b6e57976 (patch) | |
| tree | 15fd282d2c8a604f133ff3c15710a246d63b3f3d /llvm/test/CodeGen/ARM/rev.ll | |
| parent | 91f5ae5022c75fb35b77aeffd5dac4163f456ee8 (diff) | |
| download | bcm5719-llvm-f258a15bdfd63b98c33f7d14aa43c7d3b6e57976.tar.gz bcm5719-llvm-f258a15bdfd63b98c33f7d14aa43c7d3b6e57976.zip | |
Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high 16 bits
of x are zero. This optimizes rev + lsr 16 to rev16.
rdar://10750814
llvm-svn: 151230
Diffstat (limited to 'llvm/test/CodeGen/ARM/rev.ll')
| -rw-r--r-- | llvm/test/CodeGen/ARM/rev.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/ARM/rev.ll b/llvm/test/CodeGen/ARM/rev.ll index ea44c28fb70..6bb67431198 100644 --- a/llvm/test/CodeGen/ARM/rev.ll +++ b/llvm/test/CodeGen/ARM/rev.ll @@ -112,11 +112,11 @@ entry: ret i32 %conv3 } +; rdar://10750814 define zeroext i16 @test9(i16 zeroext %v) nounwind readnone { entry: ; CHECK: test9 -; CHECK: rev r0, r0 -; CHECK: lsr r0, r0, #16 +; CHECK: rev16 r0, r0 %conv = zext i16 %v to i32 %shr4 = lshr i32 %conv, 8 %shl = shl nuw nsw i32 %conv, 8 |
