diff options
Diffstat (limited to 'llvm/test/Transforms/InstCombine/fsh.ll')
| -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 +} + |
