142 lines
5.4 KiB
LLVM
142 lines
5.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define double @x(i32 %a, i32 %b) {
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; CHECK-LABEL: @x(
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; CHECK-NEXT: [[M:%.*]] = lshr i32 [[A:%.*]], 24
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; CHECK-NEXT: [[N:%.*]] = and i32 [[M]], [[B:%.*]]
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; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw i32 [[N]], 1
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; CHECK-NEXT: [[P:%.*]] = sitofp i32 [[ADDCONV]] to double
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; CHECK-NEXT: ret double [[P]]
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;
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%m = lshr i32 %a, 24
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%n = and i32 %m, %b
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%o = sitofp i32 %n to double
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%p = fadd double %o, 1.0
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ret double %p
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}
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define double @test(i32 %a) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
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; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw i32 [[A_AND]], 1
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; CHECK-NEXT: [[RES:%.*]] = sitofp i32 [[ADDCONV]] to double
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; CHECK-NEXT: ret double [[RES]]
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;
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; Drop two highest bits to guarantee that %a + 1 doesn't overflow
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%a_and = and i32 %a, 1073741823
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%a_and_fp = sitofp i32 %a_and to double
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%res = fadd double %a_and_fp, 1.0
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ret double %res
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}
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define float @test_neg(i32 %a) {
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; CHECK-LABEL: @test_neg(
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; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
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; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float
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; CHECK-NEXT: [[RES:%.*]] = fadd float [[A_AND_FP]], 1.000000e+00
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; CHECK-NEXT: ret float [[RES]]
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;
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; Drop two highest bits to guarantee that %a + 1 doesn't overflow
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%a_and = and i32 %a, 1073741823
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%a_and_fp = sitofp i32 %a_and to float
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%res = fadd float %a_and_fp, 1.0
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ret float %res
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}
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define double @test_2(i32 %a, i32 %b) {
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; CHECK-LABEL: @test_2(
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; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
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; CHECK-NEXT: [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823
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; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw i32 [[A_AND]], [[B_AND]]
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; CHECK-NEXT: [[RES:%.*]] = sitofp i32 [[ADDCONV]] to double
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; CHECK-NEXT: ret double [[RES]]
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;
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; Drop two highest bits to guarantee that %a + %b doesn't overflow
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%a_and = and i32 %a, 1073741823
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%b_and = and i32 %b, 1073741823
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%a_and_fp = sitofp i32 %a_and to double
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%b_and_fp = sitofp i32 %b_and to double
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%res = fadd double %a_and_fp, %b_and_fp
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ret double %res
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}
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define float @test_2_neg(i32 %a, i32 %b) {
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; CHECK-LABEL: @test_2_neg(
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; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
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; CHECK-NEXT: [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823
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; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float
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; CHECK-NEXT: [[B_AND_FP:%.*]] = sitofp i32 [[B_AND]] to float
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; CHECK-NEXT: [[RES:%.*]] = fadd float [[A_AND_FP]], [[B_AND_FP]]
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; CHECK-NEXT: ret float [[RES]]
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;
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; Drop two highest bits to guarantee that %a + %b doesn't overflow
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%a_and = and i32 %a, 1073741823
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%b_and = and i32 %b, 1073741823
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%a_and_fp = sitofp i32 %a_and to float
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%b_and_fp = sitofp i32 %b_and to float
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%res = fadd float %a_and_fp, %b_and_fp
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ret float %res
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}
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; This test demonstrates overly conservative legality check. The float addition
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; can be replaced with the integer addition because the result of the operation
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; can be represented in float, but we don't do that now.
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define float @test_3(i32 %a, i32 %b) {
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; CHECK-LABEL: @test_3(
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; CHECK-NEXT: [[M:%.*]] = lshr i32 [[A:%.*]], 24
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; CHECK-NEXT: [[N:%.*]] = and i32 [[M]], [[B:%.*]]
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; CHECK-NEXT: [[O:%.*]] = sitofp i32 [[N]] to float
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; CHECK-NEXT: [[P:%.*]] = fadd float [[O]], 1.000000e+00
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; CHECK-NEXT: ret float [[P]]
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;
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%m = lshr i32 %a, 24
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%n = and i32 %m, %b
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%o = sitofp i32 %n to float
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%p = fadd float %o, 1.0
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ret float %p
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}
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define <4 x double> @test_4(<4 x i32> %a, <4 x i32> %b) {
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; CHECK-LABEL: @test_4(
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; CHECK-NEXT: [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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; CHECK-NEXT: [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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; CHECK-NEXT: [[ADDCONV:%.*]] = add nuw nsw <4 x i32> [[A_AND]], [[B_AND]]
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; CHECK-NEXT: [[RES:%.*]] = sitofp <4 x i32> [[ADDCONV]] to <4 x double>
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; CHECK-NEXT: ret <4 x double> [[RES]]
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;
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; Drop two highest bits to guarantee that %a + %b doesn't overflow
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%a_and = and <4 x i32> %a, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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%b_and = and <4 x i32> %b, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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%a_and_fp = sitofp <4 x i32> %a_and to <4 x double>
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%b_and_fp = sitofp <4 x i32> %b_and to <4 x double>
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%res = fadd <4 x double> %a_and_fp, %b_and_fp
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ret <4 x double> %res
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}
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define <4 x float> @test_4_neg(<4 x i32> %a, <4 x i32> %b) {
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; CHECK-LABEL: @test_4_neg(
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; CHECK-NEXT: [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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; CHECK-NEXT: [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp <4 x i32> [[A_AND]] to <4 x float>
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; CHECK-NEXT: [[B_AND_FP:%.*]] = sitofp <4 x i32> [[B_AND]] to <4 x float>
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; CHECK-NEXT: [[RES:%.*]] = fadd <4 x float> [[A_AND_FP]], [[B_AND_FP]]
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; CHECK-NEXT: ret <4 x float> [[RES]]
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;
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; Drop two highest bits to guarantee that %a + %b doesn't overflow
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%a_and = and <4 x i32> %a, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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%b_and = and <4 x i32> %b, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
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%a_and_fp = sitofp <4 x i32> %a_and to <4 x float>
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%b_and_fp = sitofp <4 x i32> %b_and to <4 x float>
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%res = fadd <4 x float> %a_and_fp, %b_and_fp
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ret <4 x float> %res
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}
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