mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
27 lines
979 B
LLVM
27 lines
979 B
LLVM
; Test that the StrChrOptimizer works correctly
|
|
; RUN: opt %s -simplify-libcalls | llvm-dis | \
|
|
; RUN: not grep {call.*@strchr}
|
|
|
|
; This transformation requires the pointer size, as it assumes that size_t is
|
|
; the size of a pointer.
|
|
target datalayout = "-p:64:64:64"
|
|
|
|
@hello = constant [14 x i8] c"hello world\5Cn\00" ; <[14 x i8]*> [#uses=1]
|
|
@null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
|
|
|
|
declare i8* @strchr(i8*, i32)
|
|
|
|
declare i32 @puts(i8*)
|
|
|
|
define i32 @main() {
|
|
%hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=2]
|
|
%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
|
|
%world = call i8* @strchr( i8* %hello_p, i32 119 ) ; <i8*> [#uses=1]
|
|
%ignore = call i8* @strchr( i8* %null_p, i32 119 ) ; <i8*> [#uses=0]
|
|
%len = call i32 @puts( i8* %world ) ; <i32> [#uses=1]
|
|
%index = add i32 %len, 112 ; <i32> [#uses=2]
|
|
%result = call i8* @strchr( i8* %hello_p, i32 %index ) ; <i8*> [#uses=0]
|
|
ret i32 %index
|
|
}
|
|
|