mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
29f1f4f7b1
This patch migrates the strcat and strncat optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 165874
38 lines
1.1 KiB
LLVM
38 lines
1.1 KiB
LLVM
; Test that the strncat libcall simplifier works correctly.
|
|
;
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
|
|
|
|
@hello = constant [6 x i8] c"hello\00"
|
|
@null = constant [1 x i8] zeroinitializer
|
|
@null_hello = constant [7 x i8] c"\00hello\00"
|
|
|
|
declare i8* @strncat(i8*, i8*, i32)
|
|
declare i32 @puts(i8*)
|
|
|
|
define i32 @main() {
|
|
; CHECK: @main
|
|
; CHECK-NOT: call i8* @strncat
|
|
; CHECK: call i32 @puts
|
|
|
|
%target = alloca [1024 x i8]
|
|
%arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
|
|
store i8 0, i8* %arg1
|
|
|
|
; rslt1 = strncat(target, "hello\00")
|
|
%arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
|
|
%rslt1 = call i8* @strncat(i8* %arg1, i8* %arg2, i32 6)
|
|
|
|
; rslt2 = strncat(rslt1, "\00")
|
|
%arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0
|
|
%rslt2 = call i8* @strncat(i8* %rslt1, i8* %arg3, i32 42)
|
|
|
|
; rslt3 = strncat(rslt2, "\00hello\00")
|
|
%arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0
|
|
%rslt3 = call i8* @strncat(i8* %rslt2, i8* %arg4, i32 42)
|
|
|
|
call i32 @puts(i8* %rslt3)
|
|
ret i32 0
|
|
}
|