forked from OSchip/llvm-project
67 lines
2.0 KiB
LLVM
67 lines
2.0 KiB
LLVM
; Test lib call simplification of __strncpy_chk calls with various values
|
|
; for len and dstlen.
|
|
;
|
|
; 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"
|
|
|
|
@a = common global [60 x i8] zeroinitializer, align 1
|
|
@b = common global [60 x i8] zeroinitializer, align 1
|
|
@.str = private constant [12 x i8] c"abcdefghijk\00"
|
|
|
|
; Check cases where dstlen >= len
|
|
|
|
define void @test_simplify1() {
|
|
; CHECK: @test_simplify1
|
|
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
|
|
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
|
|
call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 12, i32 60)
|
|
ret void
|
|
}
|
|
|
|
define void @test_simplify2() {
|
|
; CHECK: @test_simplify2
|
|
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
|
|
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
|
|
call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 12, i32 12)
|
|
ret void
|
|
}
|
|
|
|
define void @test_simplify3() {
|
|
; CHECK: @test_simplify3
|
|
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
|
|
|
|
; CHECK-NEXT: call i8* @strncpy
|
|
call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 12, i32 60)
|
|
ret void
|
|
}
|
|
|
|
; Check cases where dstlen < len
|
|
|
|
define void @test_no_simplify1() {
|
|
; CHECK: @test_no_simplify1
|
|
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
|
|
|
|
; CHECK-NEXT: call i8* @__strncpy_chk
|
|
call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 4)
|
|
ret void
|
|
}
|
|
|
|
define void @test_no_simplify2() {
|
|
; CHECK: @test_no_simplify2
|
|
%dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
|
|
%src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
|
|
|
|
; CHECK-NEXT: call i8* @__strncpy_chk
|
|
call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 0)
|
|
ret void
|
|
}
|
|
|
|
declare i8* @__strncpy_chk(i8*, i8*, i32, i32)
|