| Ulrich Weigand | b63f779 | 2015-04-21 17:26:18 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -triple s390x-linux-gnu -emit-llvm %s -o - | FileCheck %s |
| 2 | |
| 3 | // SystemZ prefers to align all global variables to two bytes. |
| 4 | |
| 5 | struct test { |
| 6 | signed char a; |
| 7 | }; |
| 8 | |
| 9 | char c; |
| 10 | // CHECK-DAG: @c = common global i8 0, align 2 |
| 11 | |
| 12 | struct test s; |
| 13 | // CHECK-DAG: @s = common global %struct.test zeroinitializer, align 2 |
| 14 | |
| Ulrich Weigand | 4608438 | 2015-04-21 17:27:59 +0000 | [diff] [blame] | 15 | extern char ec; |
| 16 | // CHECK-DAG: @ec = external global i8, align 2 |
| 17 | |
| 18 | extern struct test es; |
| 19 | // CHECK-DAG: @es = external global %struct.test, align 2 |
| 20 | |
| 21 | // Dummy function to make sure external symbols are used. |
| 22 | void func (void) |
| 23 | { |
| 24 | c = ec; |
| 25 | s = es; |
| 26 | } |
| 27 | |
| Ulrich Weigand | 6e2cea6 | 2015-07-10 11:31:43 +0000 | [diff] [blame] | 28 | |
| 29 | // Alignment should be respected for coerced argument loads |
| 30 | |
| 31 | struct arg { long y __attribute__((packed, aligned(4))); }; |
| 32 | |
| 33 | extern struct arg x; |
| 34 | void f(struct arg); |
| 35 | |
| 36 | void test (void) |
| 37 | { |
| 38 | f(x); |
| 39 | } |
| 40 | |
| 41 | // CHECK-LABEL: @test |
| 42 | // CHECK: load i64, i64* getelementptr inbounds (%struct.arg, %struct.arg* @x, i32 0, i32 0), align 4 |
| 43 | |