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