| Petar Jovanovic | 644b8c1 | 2016-04-13 12:25:25 +0000 | [diff] [blame] | 1 | ; RUN: opt -codegenprepare -S < %s | FileCheck %s |
| 2 | |
| 3 | ; #include<stdlib.h> |
| 4 | ; #define STATIC_BUF_SIZE 10 |
| 5 | ; #define LARGER_BUF_SIZE 30 |
| 6 | ; |
| 7 | ; size_t foo1(int flag) { |
| 8 | ; char *cptr; |
| 9 | ; char chararray[LARGER_BUF_SIZE]; |
| 10 | ; char chararray2[STATIC_BUF_SIZE]; |
| 11 | ; if(flag) |
| 12 | ; cptr = chararray2; |
| 13 | ; else |
| 14 | ; cptr = chararray; |
| 15 | ; |
| 16 | ; return __builtin_object_size(cptr, 2); |
| 17 | ; } |
| 18 | ; |
| 19 | ; size_t foo2(int n) { |
| 20 | ; char Small[10]; |
| 21 | ; char Large[20]; |
| 22 | ; char *Ptr = n ? Small : Large + 19; |
| 23 | ; return __builtin_object_size(Ptr, 0); |
| 24 | ; } |
| 25 | ; |
| 26 | ; void foo() { |
| 27 | ; size_t ret; |
| 28 | ; size_t ret1; |
| 29 | ; ret = foo1(0); |
| 30 | ; ret1 = foo2(0); |
| 31 | ; printf("\n%d %d\n", ret, ret1); |
| 32 | ; } |
| 33 | |
| 34 | target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| 35 | target triple = "x86_64-unknown-linux-gnu" |
| 36 | |
| 37 | @.str = private unnamed_addr constant [8 x i8] c"\0A%d %d\0A\00", align 1 |
| 38 | |
| 39 | define i64 @foo1(i32 %flag) { |
| 40 | entry: |
| 41 | %chararray = alloca [30 x i8], align 16 |
| 42 | %chararray2 = alloca [10 x i8], align 1 |
| 43 | %0 = getelementptr inbounds [30 x i8], [30 x i8]* %chararray, i64 0, i64 0 |
| 44 | call void @llvm.lifetime.start(i64 30, i8* %0) |
| 45 | %1 = getelementptr inbounds [10 x i8], [10 x i8]* %chararray2, i64 0, i64 0 |
| 46 | call void @llvm.lifetime.start(i64 10, i8* %1) |
| 47 | %tobool = icmp eq i32 %flag, 0 |
| 48 | %cptr.0 = select i1 %tobool, i8* %0, i8* %1 |
| 49 | %2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cptr.0, i1 true) |
| 50 | call void @llvm.lifetime.end(i64 10, i8* %1) |
| 51 | call void @llvm.lifetime.end(i64 30, i8* %0) |
| 52 | ret i64 %2 |
| 53 | ; CHECK-LABEL: foo1 |
| 54 | ; CHECK: ret i64 10 |
| 55 | } |
| 56 | |
| 57 | declare void @llvm.lifetime.start(i64, i8* nocapture) |
| 58 | |
| 59 | declare i64 @llvm.objectsize.i64.p0i8(i8*, i1) |
| 60 | |
| 61 | declare void @llvm.lifetime.end(i64, i8* nocapture) |
| 62 | |
| 63 | define i64 @foo2(i32 %n) { |
| 64 | entry: |
| 65 | %Small = alloca [10 x i8], align 1 |
| 66 | %Large = alloca [20 x i8], align 16 |
| 67 | %0 = getelementptr inbounds [10 x i8], [10 x i8]* %Small, i64 0, i64 0 |
| 68 | call void @llvm.lifetime.start(i64 10, i8* %0) |
| 69 | %1 = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 0 |
| 70 | call void @llvm.lifetime.start(i64 20, i8* %1) |
| 71 | %tobool = icmp ne i32 %n, 0 |
| 72 | %add.ptr = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 19 |
| 73 | %cond = select i1 %tobool, i8* %0, i8* %add.ptr |
| 74 | %2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cond, i1 false) |
| 75 | call void @llvm.lifetime.end(i64 20, i8* %1) |
| 76 | call void @llvm.lifetime.end(i64 10, i8* %0) |
| 77 | ret i64 %2 |
| 78 | ; CHECK-LABEL: foo2 |
| 79 | ; CHECK: ret i64 10 |
| 80 | } |
| 81 | |
| 82 | define void @foo() { |
| 83 | entry: |
| 84 | %call = tail call i64 @foo1(i32 0) |
| 85 | %call1 = tail call i64 @foo2(i32 0) |
| 86 | %call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i64 %call, i64 %call1) |
| 87 | ret void |
| 88 | } |
| 89 | |
| 90 | declare i32 @printf(i8* nocapture readonly, ...) |