1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=reassociate -S | FileCheck %s 3 4; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z. 5 6define i32 @test1(i32 %a, i32 %b, i32 %z) { 7; CHECK-LABEL: @test1( 8; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], 12345 9; CHECK-NEXT: [[F:%.*]] = mul i32 [[E]], [[B:%.*]] 10; CHECK-NEXT: [[G:%.*]] = mul i32 [[F]], [[Z:%.*]] 11; CHECK-NEXT: ret i32 [[G]] 12; 13 %c = sub i32 0, %z 14 %d = mul i32 %a, %b 15 %e = mul i32 %c, %d 16 %f = mul i32 %e, 12345 17 %g = sub i32 0, %f 18 ret i32 %g 19} 20 21define i32 @test2(i32 %a, i32 %b, i32 %z) { 22; CHECK-LABEL: @test2( 23; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], 40 24; CHECK-NEXT: [[F:%.*]] = mul i32 [[E]], [[Z:%.*]] 25; CHECK-NEXT: ret i32 [[F]] 26; 27 %d = mul i32 %z, 40 28 %c = sub i32 0, %d 29 %e = mul i32 %a, %c 30 %f = sub i32 0, %e 31 ret i32 %f 32} 33 34define <2 x i32> @negate_vec_poisons(<2 x i32> %a, <2 x i32> %b, <2 x i32> %z) { 35; CHECK-LABEL: @negate_vec_poisons( 36; CHECK-NEXT: [[E:%.*]] = mul <2 x i32> [[A:%.*]], splat (i32 40) 37; CHECK-NEXT: [[F:%.*]] = mul <2 x i32> [[E]], [[Z:%.*]] 38; CHECK-NEXT: ret <2 x i32> [[F]] 39; 40 %d = mul <2 x i32> %z, <i32 40, i32 40> 41 %c = sub <2 x i32> <i32 0, i32 poison>, %d 42 %e = mul <2 x i32> %a, %c 43 %f = sub <2 x i32> <i32 0, i32 poison>, %e 44 ret <2 x i32> %f 45} 46 47; Replacing %x with a partial undef negation is a miscompile. 48 49define <2 x i32> @PR57683(<2 x i32> %x) { 50; CHECK-LABEL: @PR57683( 51; CHECK-NEXT: [[PARTIAL_NEG:%.*]] = sub <2 x i32> <i32 poison, i32 0>, [[X:%.*]] 52; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[PARTIAL_NEG]], <2 x i32> [[X]], <2 x i32> <i32 1, i32 3> 53; CHECK-NEXT: [[X_NEG:%.*]] = sub <2 x i32> zeroinitializer, [[X]] 54; CHECK-NEXT: [[SUB:%.*]] = add <2 x i32> [[X_NEG]], splat (i32 1) 55; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[SUB]], [[SHUF]] 56; CHECK-NEXT: ret <2 x i32> [[R]] 57; 58 %partial_neg = sub <2 x i32> <i32 poison, i32 0>, %x 59 %shuf = shufflevector <2 x i32> %partial_neg, <2 x i32> %x, <2 x i32> <i32 1, i32 3> 60 %sub = sub <2 x i32> <i32 1, i32 1>, %x 61 %r = add <2 x i32> %sub, %shuf 62 ret <2 x i32> %r 63} 64 65define <2 x float> @PR57683_FP(<2 x float> %x) { 66; CHECK-LABEL: @PR57683_FP( 67; CHECK-NEXT: [[PARTIAL_NEG:%.*]] = fsub reassoc nsz <2 x float> <float poison, float 0.000000e+00>, [[X:%.*]] 68; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x float> [[PARTIAL_NEG]], <2 x float> [[X]], <2 x i32> <i32 1, i32 3> 69; CHECK-NEXT: [[X_NEG:%.*]] = fneg reassoc nsz <2 x float> [[X]] 70; CHECK-NEXT: [[SUB:%.*]] = fadd reassoc nsz <2 x float> [[X_NEG]], splat (float 1.000000e+00) 71; CHECK-NEXT: [[R:%.*]] = fadd reassoc nsz <2 x float> [[SUB]], [[SHUF]] 72; CHECK-NEXT: ret <2 x float> [[R]] 73; 74 %partial_neg = fsub reassoc nsz <2 x float> <float poison, float 0.0>, %x 75 %shuf = shufflevector <2 x float> %partial_neg, <2 x float> %x, <2 x i32> <i32 1, i32 3> 76 %sub = fsub reassoc nsz <2 x float> <float 1.0, float 1.0>, %x 77 %r = fadd reassoc nsz <2 x float> %sub, %shuf 78 ret <2 x float> %r 79} 80