From 55e7098bbc363473c01229517097d2a04e04e9b0 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Wed, 2 May 2012 09:59:45 +0000
Subject: The value held in the vector may be RAUW'ed by some of the
 canonicalization methods. Use a weak value handle to keep up with this.
 PR12245

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155984 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/Reassociate/pr12245.ll | 50 ++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 test/Transforms/Reassociate/pr12245.ll

(limited to 'test/Transforms/Reassociate')

diff --git a/test/Transforms/Reassociate/pr12245.ll b/test/Transforms/Reassociate/pr12245.ll
new file mode 100644
index 0000000000..84098bdb00
--- /dev/null
+++ b/test/Transforms/Reassociate/pr12245.ll
@@ -0,0 +1,50 @@
+; RUN: opt < %s -basicaa -inline -instcombine -reassociate -dse -disable-output
+; PR12245
+
+@a = common global i32 0, align 4
+@d = common global i32 0, align 4
+
+define i32 @fn2() nounwind uwtable ssp {
+entry:
+  %0 = load i32* @a, align 4, !tbaa !0
+  %dec = add nsw i32 %0, -1
+  store i32 %dec, i32* @a, align 4, !tbaa !0
+  %1 = load i32* @d, align 4, !tbaa !0
+  %sub = sub nsw i32 %dec, %1
+  store i32 %sub, i32* @d, align 4, !tbaa !0
+  %2 = load i32* @a, align 4, !tbaa !0
+  %dec1 = add nsw i32 %2, -1
+  store i32 %dec1, i32* @a, align 4, !tbaa !0
+  %3 = load i32* @d, align 4, !tbaa !0
+  %sub2 = sub nsw i32 %dec1, %3
+  store i32 %sub2, i32* @d, align 4, !tbaa !0
+  %4 = load i32* @a, align 4, !tbaa !0
+  %dec3 = add nsw i32 %4, -1
+  store i32 %dec3, i32* @a, align 4, !tbaa !0
+  %5 = load i32* @d, align 4, !tbaa !0
+  %sub4 = sub nsw i32 %dec3, %5
+  store i32 %sub4, i32* @d, align 4, !tbaa !0
+  %6 = load i32* @a, align 4, !tbaa !0
+  %dec5 = add nsw i32 %6, -1
+  store i32 %dec5, i32* @a, align 4, !tbaa !0
+  %7 = load i32* @d, align 4, !tbaa !0
+  %sub6 = sub nsw i32 %dec5, %7
+  store i32 %sub6, i32* @d, align 4, !tbaa !0
+  %8 = load i32* @a, align 4, !tbaa !0
+  %dec7 = add nsw i32 %8, -1
+  store i32 %dec7, i32* @a, align 4, !tbaa !0
+  %9 = load i32* @d, align 4, !tbaa !0
+  %sub8 = sub nsw i32 %dec7, %9
+  store i32 %sub8, i32* @d, align 4, !tbaa !0
+  ret i32 0
+}
+
+define i32 @fn1() nounwind uwtable ssp {
+entry:
+  %call = call i32 @fn2()
+  ret i32 %call
+}
+
+!0 = metadata !{metadata !"int", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA"}
-- 
cgit v1.2.3