1 ; Test that the memcmpOptimizer works correctly
2 ; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
4 @h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=0]
5 @hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=0]
6 @hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=0]
8 declare i32 @memcmp(i8*, i8*, i32)
10 define void @test(i8* %P, i8* %Q, i32 %N, i32* %IP, i1* %BP) {
11 %A = call i32 @memcmp( i8* %P, i8* %P, i32 %N ) ; <i32> [#uses=1]
12 ; CHECK-NOT: call {{.*}} memcmp
13 ; CHECK: volatile store
14 volatile store i32 %A, i32* %IP
15 %B = call i32 @memcmp( i8* %P, i8* %Q, i32 0 ) ; <i32> [#uses=1]
16 ; CHECK-NOT: call {{.*}} memcmp
17 ; CHECK: volatile store
18 volatile store i32 %B, i32* %IP
19 %C = call i32 @memcmp( i8* %P, i8* %Q, i32 1 ) ; <i32> [#uses=1]
25 ; CHECK: volatile store
26 volatile store i32 %C, i32* %IP
27 %F = call i32 @memcmp(i8* getelementptr ([4 x i8]* @hel, i32 0, i32 0),
28 i8* getelementptr ([8 x i8]* @hello_u, i32 0, i32 0),
30 ; CHECK-NOT: call {{.*}} memcmp
31 ; CHECK: volatile store
32 volatile store i32 %F, i32* %IP