1 ; This test makes sure that mul instructions are properly eliminated.
3 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep mul
6 define i32 @test1(i32 %A) {
7 %B = mul i32 %A, 1 ; <i32> [#uses=1]
11 define i32 @test2(i32 %A) {
12 ; Should convert to an add instruction
13 %B = mul i32 %A, 2 ; <i32> [#uses=1]
17 define i32 @test3(i32 %A) {
18 ; This should disappear entirely
19 %B = mul i32 %A, 0 ; <i32> [#uses=1]
23 define double @test4(double %A) {
25 %B = mul double 1.000000e+00, %A ; <double> [#uses=1]
29 define i32 @test5(i32 %A) {
30 %B = mul i32 %A, 8 ; <i32> [#uses=1]
34 define i8 @test6(i8 %A) {
35 %B = mul i8 %A, 8 ; <i8> [#uses=1]
36 %C = mul i8 %B, 8 ; <i8> [#uses=1]
40 define i32 @test7(i32 %i) {
41 %tmp = mul i32 %i, -1 ; <i32> [#uses=1]
45 define i64 @test8(i64 %i) {
47 %j = mul i64 %i, -1 ; <i64> [#uses=1]
51 define i32 @test9(i32 %i) {
53 %j = mul i32 %i, -1 ; <i32> [#uses=1]
57 define i32 @test10(i32 %a, i32 %b) {
58 %c = icmp slt i32 %a, 0 ; <i1> [#uses=1]
59 %d = zext i1 %c to i32 ; <i32> [#uses=1]
61 %e = mul i32 %d, %b ; <i32> [#uses=1]
65 define i32 @test11(i32 %a, i32 %b) {
66 %c = icmp sle i32 %a, -1 ; <i1> [#uses=1]
67 %d = zext i1 %c to i32 ; <i32> [#uses=1]
69 %e = mul i32 %d, %b ; <i32> [#uses=1]
73 define i32 @test12(i8 %a, i32 %b) {
74 %c = icmp ugt i8 %a, 127 ; <i1> [#uses=1]
75 %d = zext i1 %c to i32 ; <i32> [#uses=1]
77 %e = mul i32 %d, %b ; <i32> [#uses=1]