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| author | Sanjay Patel <spatel@rotateright.com> | 2018-11-27 00:08:21 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-11-27 00:08:21 +0000 |
| commit | 703299e5e944e4dc7a44bbcff6df03bb74b2ab62 (patch) | |
| tree | 8a0daf454cafebf6600396924b35b0dc902bd7d2 /llvm/test/Transforms | |
| parent | 3b47649fa8c27496892be4f687672d7dc447215b (diff) | |
| download | bcm5719-llvm-703299e5e944e4dc7a44bbcff6df03bb74b2ab62.tar.gz bcm5719-llvm-703299e5e944e4dc7a44bbcff6df03bb74b2ab62.zip | |
[InstCombine] add tests for rotate/bswap equality; NFC
llvm-svn: 347618
Diffstat (limited to 'llvm/test/Transforms')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/fsh.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/fsh.ll b/llvm/test/Transforms/InstCombine/fsh.ll index a9fb826cddc..f4c54ad3c92 100644 --- a/llvm/test/Transforms/InstCombine/fsh.ll +++ b/llvm/test/Transforms/InstCombine/fsh.ll @@ -405,3 +405,26 @@ define i33 @expanded_fshr_multi_use(i33 %a) { ret i33 %e } +declare i16 @llvm.fshl.i16(i16, i16, i16) +declare i16 @llvm.fshr.i16(i16, i16, i16) + +; Special-case: rotate a 16-bit value left/right by 8-bits is bswap. + +define i16 @fshl_bswap(i16 %x) { +; CHECK-LABEL: @fshl_bswap( +; CHECK-NEXT: [[R:%.*]] = call i16 @llvm.fshl.i16(i16 [[X:%.*]], i16 [[X]], i16 8) +; CHECK-NEXT: ret i16 [[R]] +; + %r = call i16 @llvm.fshl.i16(i16 %x, i16 %x, i16 8) + ret i16 %r +} + +define i16 @fshr_bswap(i16 %x) { +; CHECK-LABEL: @fshr_bswap( +; CHECK-NEXT: [[R:%.*]] = call i16 @llvm.fshr.i16(i16 [[X:%.*]], i16 [[X]], i16 8) +; CHECK-NEXT: ret i16 [[R]] +; + %r = call i16 @llvm.fshr.i16(i16 %x, i16 %x, i16 8) + ret i16 %r +} + |
