| Evgeniy Stepanov | f17120a | 2016-04-11 22:27:48 +0000 | [diff] [blame] | 1 | ; RUN: opt -safe-stack -S -mtriple=x86_64-unknown < %s -o - | FileCheck %s |
| 2 | |
| 3 | define void @foo() safestack sspreq { |
| 4 | entry: |
| 5 | ; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr |
| 6 | ; CHECK: %[[USST:.*]] = getelementptr i8, i8* %[[USP]], i32 -16 |
| 7 | ; CHECK: store i8* %[[USST]], i8** @__safestack_unsafe_stack_ptr |
| 8 | |
| 9 | ; CHECK: %[[A:.*]] = getelementptr i8, i8* %[[USP]], i32 -8 |
| 10 | ; CHECK: %[[StackGuardSlot:.*]] = bitcast i8* %[[A]] to i8** |
| 11 | ; CHECK: %[[StackGuard:.*]] = load i8*, i8** @__stack_chk_guard |
| 12 | ; CHECK: store i8* %[[StackGuard]], i8** %[[StackGuardSlot]] |
| 13 | %a = alloca i8, align 1 |
| 14 | |
| 15 | ; CHECK: call void @Capture |
| 16 | call void @Capture(i8* %a) |
| 17 | |
| 18 | ; CHECK: %[[B:.*]] = load i8*, i8** %[[StackGuardSlot]] |
| 19 | ; CHECK: %[[COND:.*]] = icmp ne i8* %[[StackGuard]], %[[B]] |
| 20 | ; CHECK: br i1 %[[COND]], {{.*}} !prof |
| 21 | |
| 22 | ; CHECK: call void @__stack_chk_fail() |
| 23 | ; CHECK-NEXT: unreachable |
| 24 | |
| 25 | ; CHECK: store i8* %[[USP]], i8** @__safestack_unsafe_stack_ptr |
| 26 | ; CHECK-NEXT: ret void |
| 27 | ret void |
| 28 | } |
| 29 | |
| 30 | declare void @Capture(i8*) |