fix PR6921 a different way. Intead of increasing the
alignment of globals with a specified alignment, we fix
common variables to obey their alignment. Add a comment
explaining why this behavior is important.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102365 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/alignment.ll b/test/CodeGen/X86/alignment.ll
new file mode 100644
index 0000000..06a4f3f
--- /dev/null
+++ b/test/CodeGen/X86/alignment.ll
@@ -0,0 +1,18 @@
+; RUN: llc %s -o - -mtriple=x86_64-linux-gnu | FileCheck %s
+
+; This cannot get rounded up to the preferred alignment (16) if they have an
+; explicit alignment specified.
+@GlobalA = global { [384 x i8] } zeroinitializer, align 8
+
+; CHECK: .bss
+; CHECK: .globl GlobalA
+; CHECK: .align 8
+; CHECK: GlobalA:
+; CHECK: .zero 384
+
+; Common variables should not get rounded up to the preferred alignment (16) if
+; they have an explicit alignment specified.
+; PR6921
+@GlobalB = common global { [384 x i8] } zeroinitializer, align 8
+
+; CHECK: .comm GlobalB,384,8
\ No newline at end of file