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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=instcombine -S | FileCheck %s3 4; ((ashr X, 31) | 1 ) * X --> abs(X)5; X * ((ashr X, 31) | 1 ) --> abs(X)6 7define i32 @ashr_or_mul_to_abs(i32 %X) {8; CHECK-LABEL: @ashr_or_mul_to_abs(9; CHECK-NEXT: [[I2:%.*]] = call i32 @llvm.abs.i32(i32 [[X:%.*]], i1 true)10; CHECK-NEXT: ret i32 [[I2]]11;12 %i = ashr i32 %X, 3113 %i1 = or i32 %i, 114 %i2 = mul nsw i32 %i1, %X15 ret i32 %i216}17 18define i32 @ashr_or_mul_to_abs2(i32 %X) {19; CHECK-LABEL: @ashr_or_mul_to_abs2(20; CHECK-NEXT: [[I2:%.*]] = call i32 @llvm.abs.i32(i32 [[X:%.*]], i1 false)21; CHECK-NEXT: ret i32 [[I2]]22;23 %i = ashr i32 %X, 3124 %i1 = or i32 %i, 125 %i2 = mul i32 %i1, %X26 ret i32 %i227}28 29define i32 @ashr_or_mul_to_abs3(i32 %PX) {30; CHECK-LABEL: @ashr_or_mul_to_abs3(31; CHECK-NEXT: [[X:%.*]] = sdiv i32 42, [[PX:%.*]]32; CHECK-NEXT: [[I2:%.*]] = call i32 @llvm.abs.i32(i32 [[X]], i1 false)33; CHECK-NEXT: ret i32 [[I2]]34;35 %X = sdiv i32 42, %PX ; thwart complexity-based canonicalization36 %i = ashr i32 %X, 3137 %i1 = or i32 %i, 138 %i2 = mul i32 %X, %i139 ret i32 %i240}41 42 43define <4 x i32> @ashr_or_mul_to_abs_vec(<4 x i32> %X) {44; CHECK-LABEL: @ashr_or_mul_to_abs_vec(45; CHECK-NEXT: [[I2:%.*]] = call <4 x i32> @llvm.abs.v4i32(<4 x i32> [[X:%.*]], i1 false)46; CHECK-NEXT: ret <4 x i32> [[I2]]47;48 %i = ashr <4 x i32> %X, <i32 31, i32 31, i32 31, i32 31>49 %i1 = or <4 x i32> %i, <i32 1, i32 1, i32 1, i32 1>50 %i2 = mul <4 x i32> %i1, %X51 ret <4 x i32> %i252}53 54define <4 x i32> @ashr_or_mul_to_abs_vec2(<4 x i32> %X) {55; CHECK-LABEL: @ashr_or_mul_to_abs_vec2(56; CHECK-NEXT: [[I2:%.*]] = call <4 x i32> @llvm.abs.v4i32(<4 x i32> [[X:%.*]], i1 true)57; CHECK-NEXT: ret <4 x i32> [[I2]]58;59 %i = ashr <4 x i32> %X, <i32 31, i32 31, i32 31, i32 31>60 %i1 = or <4 x i32> %i, <i32 1, i32 1, i32 1, i32 1>61 %i2 = mul nsw <4 x i32> %i1, %X62 ret <4 x i32> %i263}64 65define <4 x i32> @ashr_or_mul_to_abs_vec3_poison(<4 x i32> %X) {66; CHECK-LABEL: @ashr_or_mul_to_abs_vec3_poison(67; CHECK-NEXT: [[I2:%.*]] = call <4 x i32> @llvm.abs.v4i32(<4 x i32> [[X:%.*]], i1 false)68; CHECK-NEXT: ret <4 x i32> [[I2]]69;70 %i = ashr <4 x i32> %X, <i32 31, i32 poison, i32 31, i32 31>71 %i1 = or <4 x i32> %i, <i32 1, i32 1, i32 1, i32 poison>72 %i2 = mul <4 x i32> %i1, %X73 ret <4 x i32> %i274}75 76; Negative tests77 78define i32 @ashr_or_mul_to_abs_neg(i32 %X) {79; CHECK-LABEL: @ashr_or_mul_to_abs_neg(80; CHECK-NEXT: [[I:%.*]] = ashr i32 [[X:%.*]], 3081; CHECK-NEXT: [[I1:%.*]] = or i32 [[I]], 182; CHECK-NEXT: [[I2:%.*]] = mul nsw i32 [[I1]], [[X]]83; CHECK-NEXT: ret i32 [[I2]]84;85 %i = ashr i32 %X, 3086 %i1 = or i32 %i, 187 %i2 = mul nsw i32 %i1, %X88 ret i32 %i289}90 91define i32 @ashr_or_mul_to_abs_neg2(i32 %X) {92; CHECK-LABEL: @ashr_or_mul_to_abs_neg2(93; CHECK-NEXT: [[I:%.*]] = ashr i32 [[X:%.*]], 3194; CHECK-NEXT: [[I1:%.*]] = or i32 [[I]], 295; CHECK-NEXT: [[I2:%.*]] = mul nsw i32 [[I1]], [[X]]96; CHECK-NEXT: ret i32 [[I2]]97;98 %i = ashr i32 %X, 3199 %i1 = or i32 %i, 2100 %i2 = mul nsw i32 %i1, %X101 ret i32 %i2102}103 104define i32 @ashr_or_mul_to_abs_neg3(i32 %X, i32 %Y) {105; CHECK-LABEL: @ashr_or_mul_to_abs_neg3(106; CHECK-NEXT: [[I:%.*]] = ashr i32 [[X:%.*]], 31107; CHECK-NEXT: [[I1:%.*]] = or i32 [[I]], 1108; CHECK-NEXT: [[I2:%.*]] = mul nsw i32 [[I1]], [[Y:%.*]]109; CHECK-NEXT: ret i32 [[I2]]110;111 %i = ashr i32 %X, 31112 %i1 = or i32 %i, 1113 %i2 = mul nsw i32 %i1, %Y114 ret i32 %i2115}116