forked from OSchip/llvm-project
57 lines
1.9 KiB
LLVM
57 lines
1.9 KiB
LLVM
; Test that the StrCatOptimizer works correctly
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; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
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; RUN: not grep {call.*strlen}
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target datalayout = "e-p:32:32"
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@hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=3]
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@null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=3]
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@null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1]
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declare i32 @strlen(i8*)
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define i32 @test1() {
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%hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1]
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%hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1]
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ret i32 %hello_l
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}
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define i32 @test2() {
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%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
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%null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1]
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ret i32 %null_l
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}
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define i32 @test3() {
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%null_hello_p = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1]
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%null_hello_l = call i32 @strlen( i8* %null_hello_p ) ; <i32> [#uses=1]
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ret i32 %null_hello_l
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}
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define i1 @test4() {
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%hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1]
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%hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1]
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%eq_hello = icmp eq i32 %hello_l, 0 ; <i1> [#uses=1]
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ret i1 %eq_hello
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}
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define i1 @test5() {
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%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
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%null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1]
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%eq_null = icmp eq i32 %null_l, 0 ; <i1> [#uses=1]
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ret i1 %eq_null
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}
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define i1 @test6() {
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%hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1]
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%hello_l = call i32 @strlen( i8* %hello_p ) ; <i32> [#uses=1]
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%ne_hello = icmp ne i32 %hello_l, 0 ; <i1> [#uses=1]
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ret i1 %ne_hello
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}
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define i1 @test7() {
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%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
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%null_l = call i32 @strlen( i8* %null_p ) ; <i32> [#uses=1]
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%ne_null = icmp ne i32 %null_l, 0 ; <i1> [#uses=1]
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ret i1 %ne_null
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}
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