| Richard Smith | 2c9f87c | 2012-08-24 00:54:33 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -fcatch-undefined-behavior -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s |
| Chris Lattner | c24b9c4 | 2010-04-10 18:34:14 +0000 | [diff] [blame] | 2 | |
| 3 | // PR6805 |
| Nuno Lopes | 9eecef1 | 2012-05-07 20:23:03 +0000 | [diff] [blame] | 4 | // CHECK: @foo |
| Chris Lattner | c24b9c4 | 2010-04-10 18:34:14 +0000 | [diff] [blame] | 5 | void foo() { |
| 6 | union { int i; } u; |
| Nuno Lopes | 9eecef1 | 2012-05-07 20:23:03 +0000 | [diff] [blame] | 7 | // CHECK: objectsize |
| Nuno Lopes | 4ccf004 | 2012-05-08 01:54:53 +0000 | [diff] [blame] | 8 | // CHECK: icmp uge |
| Chris Lattner | c24b9c4 | 2010-04-10 18:34:14 +0000 | [diff] [blame] | 9 | u.i=1; |
| 10 | } |
| Nuno Lopes | 9eecef1 | 2012-05-07 20:23:03 +0000 | [diff] [blame] | 11 | |
| 12 | // CHECK: @bar |
| 13 | int bar(int *a) { |
| Richard Smith | 2c9f87c | 2012-08-24 00:54:33 +0000 | [diff] [blame] | 14 | // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 |
| 15 | // CHECK-NEXT: icmp uge i64 %[[SIZE]], 4 |
| 16 | |
| 17 | // CHECK: %[[PTRINT:.*]] = ptrtoint |
| 18 | // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 |
| 19 | // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 |
| Nuno Lopes | 9eecef1 | 2012-05-07 20:23:03 +0000 | [diff] [blame] | 20 | return *a; |
| 21 | } |