forked from OSchip/llvm-project
27 lines
903 B
LLVM
27 lines
903 B
LLVM
; Test that the StrChrOptimizer works correctly
|
|
; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
|
|
|
|
; 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"
|
|
@null = constant [1 x i8] zeroinitializer
|
|
|
|
declare i8* @strchr(i8*, i32)
|
|
|
|
define i32 @foo(i32 %index) {
|
|
%hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0
|
|
%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0
|
|
%world = call i8* @strchr(i8* %hello_p, i32 119)
|
|
; CHECK: getelementptr i8* %hello_p, i64 6
|
|
%ignore = call i8* @strchr(i8* %null_p, i32 119)
|
|
; CHECK-NOT: call i8* strchr
|
|
%null = call i8* @strchr(i8* %hello_p, i32 0)
|
|
; CHECK: getelementptr i8* %hello_p, i64 13
|
|
%result = call i8* @strchr(i8* %hello_p, i32 %index)
|
|
; CHECK: call i8* @memchr(i8* %hello_p, i32 %index, i64 14)
|
|
ret i32 %index
|
|
}
|
|
|