1 files changed, 22 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/align-external.ll b/test/Transforms/InstCombine/align-external.ll
new file mode 100644
index 0000000..6e8ad87
--- /dev/null
+++ b/test/Transforms/InstCombine/align-external.ll
@@ -0,0 +1,22 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; Don't assume that external global variables have their preferred
+; alignment. They may only have the ABI minimum alignment.
+
+; CHECK: %s = shl i64 %a, 3
+; CHECK: %r = or i64 %s, ptrtoint (i32* @A to i64)
+; CHECK: %q = add i64 %r, 1
+; CHECK: ret i64 %q
+
+target datalayout = "-i32:8:32"
+
+@A = external global i32
+@B = external global i32
+
+define i64 @foo(i64 %a) {
+  %t = ptrtoint i32* @A to i64
+  %s = shl i64 %a, 3
+  %r = or i64 %t, %s
+  %q = add i64 %r, 1
+  ret i64 %q
+}