| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| define double @x(i32 %a, i32 %b) { |
| ; CHECK-LABEL: @x( |
| ; CHECK-NEXT: [[M:%.*]] = lshr i32 [[A:%.*]], 24 |
| ; CHECK-NEXT: [[N:%.*]] = and i32 [[M]], [[B:%.*]] |
| ; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw i32 [[N]], 1 |
| ; CHECK-NEXT: [[P:%.*]] = sitofp i32 [[ADDCONV]] to double |
| ; CHECK-NEXT: ret double [[P]] |
| ; |
| %m = lshr i32 %a, 24 |
| %n = and i32 %m, %b |
| %o = sitofp i32 %n to double |
| %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 |
| } |