Fix PR5279 - don't sliently drop alignment information on stores of types that have alignment less than the natural alignment of the type when it comes from a typedef.

llvm-svn: 146908

1 files changed, 34 insertions, 0 deletions

diff --git a/clang/test/CodeGen/alignment.c b/clang/test/CodeGen/alignment.c
index 831e850f88f..8e5931859ae 100644
--- a/clang/test/CodeGen/alignment.c
+++ b/clang/test/CodeGen/alignment.c
@@ -5,3 +5,37 @@ union {int a[4]; __attribute((aligned(16))) float b[4];} b;
 
 // CHECK: @a = {{.*}}zeroinitializer, align 16
 // CHECK: @b = {{.*}}zeroinitializer, align 16
+
+
+
+// PR5279 - Reduced alignment on typedef.
+typedef int myint __attribute__((aligned(1)));
+
+void test1(myint *p) {
+  *p = 0;
+}
+// CHECK: @test1(
+// CHECK: store i32 0, i32* {{.*}}, align 1
+// CHECK: ret void
+
+
+// PR5279 - Reduced alignment on typedef.
+typedef float __attribute__((vector_size(16), aligned(4))) packedfloat4;
+
+void test2(packedfloat4 *p) {
+  *p = (packedfloat4) { 3.2f, 2.3f, 0.1f, 0.0f };
+}
+// CHECK: @test2(
+// CHECK: store <4 x float> {{.*}}, align 4
+// CHECK: ret void
+
+
+// PR5279 - Reduced alignment on typedef.
+typedef float __attribute__((ext_vector_type(3), aligned(4))) packedfloat3;
+void test3(packedfloat3 *p) {
+  *p = (packedfloat3) { 3.2f, 2.3f, 0.1f };
+}
+// CHECK: @test3(
+// CHECK: store <3 x float> {{.*}}, align 4
+// CHECK: ret void
+