mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 03:02:36 +01:00
3ad731fcef
Bionic has had `__strlen_chk` for a while. Optimizing that into a constant is quite profitable, when possible. Differential Revision: https://reviews.llvm.org/D74079
48 lines
1.5 KiB
LLVM
48 lines
1.5 KiB
LLVM
; Test that __strlen_chk simplification 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"
|
|
@hello_no_nul = constant [5 x i8] c"hello"
|
|
|
|
declare i32 @__strlen_chk(i8*, i32)
|
|
|
|
; Check __strlen_chk(string constant) -> strlen or constants
|
|
|
|
; CHECK-LABEL: @unknown_str_known_object_size
|
|
define i32 @unknown_str_known_object_size(i8* %c) {
|
|
; CHECK: call i32 @__strlen_chk
|
|
%1 = call i32 @__strlen_chk(i8* %c, i32 8)
|
|
ret i32 %1
|
|
}
|
|
|
|
; CHECK-LABEL: @known_str_known_object_size
|
|
define i32 @known_str_known_object_size(i8* %c) {
|
|
; CHECK: ret i32 5
|
|
%1 = call i32 @__strlen_chk(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6)
|
|
ret i32 %1
|
|
}
|
|
|
|
; CHECK-LABEL: @known_str_too_small_object_size
|
|
define i32 @known_str_too_small_object_size(i8* %c) {
|
|
; CHECK: call i32 @__strlen_chk
|
|
%1 = call i32 @__strlen_chk(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 5)
|
|
ret i32 %1
|
|
}
|
|
|
|
; CHECK-LABEL: @known_str_no_nul
|
|
define i32 @known_str_no_nul(i8* %c) {
|
|
; CHECK: call i32 @__strlen_chk
|
|
%1 = call i32 @__strlen_chk(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @hello_no_nul, i32 0, i32 0), i32 5)
|
|
ret i32 %1
|
|
}
|
|
|
|
; CHECK-LABEL: @unknown_str_unknown_object_size
|
|
define i32 @unknown_str_unknown_object_size(i8* %c) {
|
|
; CHECK: call i32 @strlen
|
|
%1 = call i32 @__strlen_chk(i8* %c, i32 -1)
|
|
ret i32 %1
|
|
}
|