| Meador Inge | 7fbc364 | 2012-09-27 21:21:31 +0000 | [diff] [blame^] | 1 | ; Test lib call simplification of __strncpy_chk calls with various values |
| 2 | ; for len and dstlen. |
| 3 | ; |
| 4 | ; RUN: opt < %s -instcombine -S | FileCheck %s |
| 5 | |
| 6 | 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" |
| 7 | |
| 8 | @a = common global [60 x i8] zeroinitializer, align 1 |
| 9 | @b = common global [60 x i8] zeroinitializer, align 1 |
| 10 | @.str = private constant [8 x i8] c"abcdefg\00" |
| 11 | |
| 12 | ; Check cases where dstlen >= len |
| 13 | |
| 14 | define void @test_simplify1() { |
| 15 | ; CHECK: @test_simplify1 |
| 16 | %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0 |
| 17 | %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0 |
| 18 | |
| 19 | ; CHECK-NEXT: call i8* @strncpy |
| 20 | call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 60) |
| 21 | ret void |
| 22 | } |
| 23 | |
| 24 | define void @test_simplify2() { |
| 25 | ; CHECK: @test_simplify2 |
| 26 | %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0 |
| 27 | %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0 |
| 28 | |
| 29 | ; CHECK-NEXT: call i8* @strncpy |
| 30 | call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 8) |
| 31 | ret void |
| 32 | } |
| 33 | |
| 34 | define void @test_simplify3() { |
| 35 | ; CHECK: @test_simplify3 |
| 36 | %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0 |
| 37 | %src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0 |
| 38 | |
| 39 | ; CHECK-NEXT: call i8* @strncpy |
| 40 | call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 60) |
| 41 | ret void |
| 42 | } |
| 43 | |
| 44 | ; Check cases where dstlen < len |
| 45 | |
| 46 | define void @test_no_simplify1() { |
| 47 | ; CHECK: @test_no_simplify1 |
| 48 | %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0 |
| 49 | %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0 |
| 50 | |
| 51 | ; CHECK-NEXT: call i8* @__strncpy_chk |
| 52 | call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 4) |
| 53 | ret void |
| 54 | } |
| 55 | |
| 56 | define void @test_no_simplify2() { |
| 57 | ; CHECK: @test_no_simplify2 |
| 58 | %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0 |
| 59 | %src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0 |
| 60 | |
| 61 | ; CHECK-NEXT: call i8* @__strncpy_chk |
| 62 | call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 0) |
| 63 | ret void |
| 64 | } |
| 65 | |
| 66 | declare i8* @__strncpy_chk(i8*, i8*, i32, i32) |