1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=reassociate -S | FileCheck %s
4 ; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
6 define i32 @test1(i32 %a, i32 %b, i32 %z) {
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]]
16 %f = mul i32 %e, 12345
21 define 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]]
34 define <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]]
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
47 ; Replacing %x with a partial undef negation is a miscompile.
49 define <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]]
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
65 define <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]]
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