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-rw-r--r--test/Transforms/SimplifyLibCalls/memcmp.ll23
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/memcmp.ll b/test/Transforms/SimplifyLibCalls/memcmp.ll
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+++ b/test/Transforms/SimplifyLibCalls/memcmp.ll
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+; Test that the memcmpOptimizer works correctly
+; RUN: opt < %s -simplify-libcalls -S | not grep {call.*memcmp}
+
+@h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=0]
+@hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=0]
+@hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=0]
+
+declare i32 @memcmp(i8*, i8*, i32)
+
+define void @test(i8* %P, i8* %Q, i32 %N, i32* %IP, i1* %BP) {
+ %A = call i32 @memcmp( i8* %P, i8* %P, i32 %N ) ; <i32> [#uses=1]
+ volatile store i32 %A, i32* %IP
+ %B = call i32 @memcmp( i8* %P, i8* %Q, i32 0 ) ; <i32> [#uses=1]
+ volatile store i32 %B, i32* %IP
+ %C = call i32 @memcmp( i8* %P, i8* %Q, i32 1 ) ; <i32> [#uses=1]
+ volatile store i32 %C, i32* %IP
+ %F = call i32 @memcmp(i8* getelementptr ([4 x i8]* @hel, i32 0, i32 0),
+ i8* getelementptr ([8 x i8]* @hello_u, i32 0, i32 0),
+ i32 3)
+ volatile store i32 %F, i32* %IP
+ ret void
+}
+