diff options
Diffstat (limited to 'test/Transforms/InstCombine/add-sitofp.ll')
| -rw-r--r-- | test/Transforms/InstCombine/add-sitofp.ll | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/add-sitofp.ll b/test/Transforms/InstCombine/add-sitofp.ll index 2abfa436f6d33..105c9efa08932 100644 --- a/test/Transforms/InstCombine/add-sitofp.ll +++ b/test/Transforms/InstCombine/add-sitofp.ll @@ -15,3 +15,127 @@ define double @x(i32 %a, i32 %b) { %p = fadd double %o, 1.0 ret double %p } + +define double @test(i32 %a) { +; CHECK-LABEL: @test( +; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823 +; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw i32 [[A_AND]], 1 +; CHECK-NEXT: [[RES:%.*]] = sitofp i32 [[ADDCONV]] to double +; CHECK-NEXT: ret double [[RES]] +; + ; Drop two highest bits to guarantee that %a + 1 doesn't overflow + %a_and = and i32 %a, 1073741823 + %a_and_fp = sitofp i32 %a_and to double + %res = fadd double %a_and_fp, 1.0 + ret double %res +} + +define float @test_neg(i32 %a) { +; CHECK-LABEL: @test_neg( +; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823 +; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float +; CHECK-NEXT: [[RES:%.*]] = fadd float [[A_AND_FP]], 1.000000e+00 +; CHECK-NEXT: ret float [[RES]] +; + ; Drop two highest bits to guarantee that %a + 1 doesn't overflow + %a_and = and i32 %a, 1073741823 + %a_and_fp = sitofp i32 %a_and to float + %res = fadd float %a_and_fp, 1.0 + ret float %res +} + +define double @test_2(i32 %a, i32 %b) { +; CHECK-LABEL: @test_2( +; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823 +; CHECK-NEXT: [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823 +; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw i32 [[A_AND]], [[B_AND]] +; CHECK-NEXT: [[RES:%.*]] = sitofp i32 [[ADDCONV]] to double +; CHECK-NEXT: ret double [[RES]] +; + ; Drop two highest bits to guarantee that %a + %b doesn't overflow + %a_and = and i32 %a, 1073741823 + %b_and = and i32 %b, 1073741823 + + %a_and_fp = sitofp i32 %a_and to double + %b_and_fp = sitofp i32 %b_and to double + + %res = fadd double %a_and_fp, %b_and_fp + ret double %res +} + +define float @test_2_neg(i32 %a, i32 %b) { +; CHECK-LABEL: @test_2_neg( +; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823 +; CHECK-NEXT: [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823 +; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float +; CHECK-NEXT: [[B_AND_FP:%.*]] = sitofp i32 [[B_AND]] to float +; CHECK-NEXT: [[RES:%.*]] = fadd float [[A_AND_FP]], [[B_AND_FP]] +; CHECK-NEXT: ret float [[RES]] +; + ; Drop two highest bits to guarantee that %a + %b doesn't overflow + %a_and = and i32 %a, 1073741823 + %b_and = and i32 %b, 1073741823 + + %a_and_fp = sitofp i32 %a_and to float + %b_and_fp = sitofp i32 %b_and to float + + %res = fadd float %a_and_fp, %b_and_fp + ret float %res +} + +; This test demonstrates overly conservative legality check. The float addition +; can be replaced with the integer addition because the result of the operation +; can be represented in float, but we don't do that now. +define float @test_3(i32 %a, i32 %b) { +; CHECK-LABEL: @test_3( +; CHECK-NEXT: [[M:%.*]] = lshr i32 [[A:%.*]], 24 +; CHECK-NEXT: [[N:%.*]] = and i32 [[M]], [[B:%.*]] +; CHECK-NEXT: [[O:%.*]] = sitofp i32 [[N]] to float +; CHECK-NEXT: [[P:%.*]] = fadd float [[O]], 1.000000e+00 +; CHECK-NEXT: ret float [[P]] +; + %m = lshr i32 %a, 24 + %n = and i32 %m, %b + %o = sitofp i32 %n to float + %p = fadd float %o, 1.0 + ret float %p +} + +define <4 x double> @test_4(<4 x i32> %a, <4 x i32> %b) { +; CHECK-LABEL: @test_4( +; CHECK-NEXT: [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> +; CHECK-NEXT: [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> +; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw <4 x i32> [[A_AND]], [[B_AND]] +; CHECK-NEXT: [[RES:%.*]] = sitofp <4 x i32> [[ADDCONV]] to <4 x double> +; CHECK-NEXT: ret <4 x double> [[RES]] +; + ; Drop two highest bits to guarantee that %a + %b doesn't overflow + %a_and = and <4 x i32> %a, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> + %b_and = and <4 x i32> %b, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> + + %a_and_fp = sitofp <4 x i32> %a_and to <4 x double> + %b_and_fp = sitofp <4 x i32> %b_and to <4 x double> + + %res = fadd <4 x double> %a_and_fp, %b_and_fp + ret <4 x double> %res +} + +define <4 x float> @test_4_neg(<4 x i32> %a, <4 x i32> %b) { +; CHECK-LABEL: @test_4_neg( +; CHECK-NEXT: [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> +; CHECK-NEXT: [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> +; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp <4 x i32> [[A_AND]] to <4 x float> +; CHECK-NEXT: [[B_AND_FP:%.*]] = sitofp <4 x i32> [[B_AND]] to <4 x float> +; CHECK-NEXT: [[RES:%.*]] = fadd <4 x float> [[A_AND_FP]], [[B_AND_FP]] +; CHECK-NEXT: ret <4 x float> [[RES]] +; + ; Drop two highest bits to guarantee that %a + %b doesn't overflow + %a_and = and <4 x i32> %a, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> + %b_and = and <4 x i32> %b, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823> + + %a_and_fp = sitofp <4 x i32> %a_and to <4 x float> + %b_and_fp = sitofp <4 x i32> %b_and to <4 x float> + + %res = fadd <4 x float> %a_and_fp, %b_and_fp + ret <4 x float> %res +} |