diff options
| -rw-r--r-- | llvm/test/CodeGen/X86/dagcombine-unsafe-math.ll | 58 |
1 files changed, 36 insertions, 22 deletions
diff --git a/llvm/test/CodeGen/X86/dagcombine-unsafe-math.ll b/llvm/test/CodeGen/X86/dagcombine-unsafe-math.ll index f06d9f1dc4b..62e182b998e 100644 --- a/llvm/test/CodeGen/X86/dagcombine-unsafe-math.ll +++ b/llvm/test/CodeGen/X86/dagcombine-unsafe-math.ll @@ -1,56 +1,70 @@ -; RUN: llc < %s -enable-unsafe-fp-math -mtriple=x86_64-apple-darwin -mcpu=corei7-avx | FileCheck %s +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc < %s -enable-unsafe-fp-math -mtriple=x86_64-apple-darwin -mcpu=corei7-avx | FileCheck %s ; rdar://13126763 ; Expression "x + x*x" was mistakenly transformed into "x * 3.0f". define float @test1(float %x) { +; CHECK-LABEL: test1: +; CHECK: ## %bb.0: +; CHECK-NEXT: vmulss %xmm0, %xmm0, %xmm1 +; CHECK-NEXT: vaddss %xmm0, %xmm1, %xmm0 +; CHECK-NEXT: retq %t1 = fmul fast float %x, %x %t2 = fadd fast float %t1, %x ret float %t2 -; CHECK: test1 -; CHECK: vaddss } ; (x + x) + x => x * 3.0 define float @test2(float %x) { +; CHECK-LABEL: test2: +; CHECK: ## %bb.0: +; CHECK-NEXT: vmulss {{.*}}(%rip), %xmm0, %xmm0 +; CHECK-NEXT: retq %t1 = fadd fast float %x, %x %t2 = fadd fast float %t1, %x ret float %t2 -; CHECK: .long 1077936128 -; CHECK: test2 -; CHECK: vmulss LCPI1_0(%rip), %xmm0, %xmm0 } ; x + (x + x) => x * 3.0 define float @test3(float %x) { +; CHECK-LABEL: test3: +; CHECK: ## %bb.0: +; CHECK-NEXT: vmulss {{.*}}(%rip), %xmm0, %xmm0 +; CHECK-NEXT: retq %t1 = fadd fast float %x, %x - %t2 = fadd fast float %t1, %x + %t2 = fadd fast float %x, %t1 ret float %t2 -; CHECK: .long 1077936128 -; CHECK: test3 -; CHECK: vmulss LCPI2_0(%rip), %xmm0, %xmm0 } ; (y + x) + x != x * 3.0 define float @test4(float %x, float %y) { +; CHECK-LABEL: test4: +; CHECK: ## %bb.0: +; CHECK-NEXT: vaddss %xmm1, %xmm0, %xmm1 +; CHECK-NEXT: vaddss %xmm0, %xmm1, %xmm0 +; CHECK-NEXT: retq %t1 = fadd fast float %x, %y %t2 = fadd fast float %t1, %x ret float %t2 -; CHECK: test4 -; CHECK: vaddss } ; rdar://13445387 -; "x + x + x => 3.0 * x" should be disabled after legalization because +; "x + x + x => 3.0 * x" should be disabled after legalization because ; Instruction-Selection doesn't know how to handle "3.0" -; -define float @test5() { - %mul.i.i151 = fmul <4 x float> zeroinitializer, zeroinitializer - %vecext.i8.i152 = extractelement <4 x float> %mul.i.i151, i32 1 - %vecext1.i9.i153 = extractelement <4 x float> %mul.i.i151, i32 0 - %add.i10.i154 = fadd float %vecext1.i9.i153, %vecext.i8.i152 - %vecext.i7.i155 = extractelement <4 x float> %mul.i.i151, i32 2 - %add.i.i156 = fadd float %vecext.i7.i155, %add.i10.i154 - ret float %add.i.i156 +; +define float @test5(<4 x float> %x) { +; CHECK-LABEL: test5: +; CHECK: ## %bb.0: +; CHECK-NEXT: vmulss {{.*}}(%rip), %xmm0, %xmm0 +; CHECK-NEXT: retq + %splat = shufflevector <4 x float> %x, <4 x float> undef, <4 x i32> zeroinitializer + %v1 = extractelement <4 x float> %splat, i32 1 + %v0 = extractelement <4 x float> %splat, i32 0 + %add1 = fadd float %v0, %v1 + %v2 = extractelement <4 x float> %splat, i32 2 + %add2 = fadd float %v2, %add1 + ret float %add2 } + |
