fix infinite loop in instcombine with more than 4GB memcpy

[oota-llvm.git] / test / Transforms / InstCombine / align-external.ll

diff --git a/test/Transforms/InstCombine/align-external.ll b/test/Transforms/InstCombine/align-external.ll
index 6e8ad87f19e057a02b78311d2be2146855568d6f..d4a5d429912bf25e030c1baaced8a60913c049f1 100644 (file)
--- a/test/Transforms/InstCombine/align-external.ll
+++ b/test/Transforms/InstCombine/align-external.ll
@@ -1,7 +1,7 @@
 ; 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.
+; Don't assume that external global variables or those with weak linkage 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)
@@ -11,7 +11,7 @@
 target datalayout = "-i32:8:32"
 
 @A = external global i32
-@B = external global i32
+@B = weak_odr global i32 0
 
 define i64 @foo(i64 %a) {
   %t = ptrtoint i32* @A to i64
@@ -20,3 +20,10 @@ define i64 @foo(i64 %a) {
   %q = add i64 %r, 1
   ret i64 %q
 }
+
+define i32 @bar() {
+; CHECK: @bar
+  %r = load i32* @B, align 1
+; CHECK: align 1
+  ret i32 %r
+}