diff options
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/InstCombine/bitcast.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/bitcast.ll b/test/Transforms/InstCombine/bitcast.ll index 88fa9a4..c248b5e 100644 --- a/test/Transforms/InstCombine/bitcast.ll +++ b/test/Transforms/InstCombine/bitcast.ll @@ -13,3 +13,25 @@ define i32 @test1(i64 %a) { ; CHECK: ret i32 0 } +; Optimize bitcasts that are extracting low element of vector. This happens +; because of SRoA. +; rdar://7892780 +define float @test2(<2 x float> %A, <2 x i32> %B) { + %tmp28 = bitcast <2 x float> %A to i64 ; <i64> [#uses=2] + %tmp23 = trunc i64 %tmp28 to i32 ; <i32> [#uses=1] + %tmp24 = bitcast i32 %tmp23 to float ; <float> [#uses=1] + + %tmp = bitcast <2 x i32> %B to i64 + %tmp2 = trunc i64 %tmp to i32 ; <i32> [#uses=1] + %tmp4 = bitcast i32 %tmp2 to float ; <float> [#uses=1] + + %add = fadd float %tmp24, %tmp4 + ret float %add + +; CHECK: @test2 +; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 0 +; CHECK-NEXT: bitcast <2 x i32> %B to <2 x float> +; CHECK-NEXT: %tmp4 = extractelement <2 x float> {{.*}}, i32 0 +; CHECK-NEXT: %add = fadd float %tmp24, %tmp4 +; CHECK-NEXT: ret float %add +} |