diff options
Diffstat (limited to 'test/Transforms/InstCombine/bswap.ll')
| -rw-r--r-- | test/Transforms/InstCombine/bswap.ll | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/test/Transforms/InstCombine/bswap.ll b/test/Transforms/InstCombine/bswap.ll index 5db4e73a54..2ba718e584 100644 --- a/test/Transforms/InstCombine/bswap.ll +++ b/test/Transforms/InstCombine/bswap.ll @@ -1,5 +1,5 @@ ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \ -; RUN: grep {call.*llvm.bswap} | count 5 +; RUN: grep {call.*llvm.bswap} | count 6 define i32 @test1(i32 %i) { %tmp1 = lshr i32 %i, 24 ; <i32> [#uses=1] @@ -55,3 +55,18 @@ define i16 @test5(i16 %a) { %retval = trunc i32 %tmp6.upgrd.4 to i16 ; <i16> [#uses=1] ret i16 %retval } + +; PR2842 +define i32 @test6(i32 %x) nounwind readnone { + %tmp = shl i32 %x, 16 ; <i32> [#uses=1] + %x.mask = and i32 %x, 65280 ; <i32> [#uses=1] + %tmp1 = lshr i32 %x, 16 ; <i32> [#uses=1] + %tmp2 = and i32 %tmp1, 255 ; <i32> [#uses=1] + %tmp3 = or i32 %x.mask, %tmp ; <i32> [#uses=1] + %tmp4 = or i32 %tmp3, %tmp2 ; <i32> [#uses=1] + %tmp5 = shl i32 %tmp4, 8 ; <i32> [#uses=1] + %tmp6 = lshr i32 %x, 24 ; <i32> [#uses=1] + %tmp7 = or i32 %tmp5, %tmp6 ; <i32> [#uses=1] + ret i32 %tmp7 +} + |