From a0c5e6ceb53c0f77906d813a354b19e72d26950c Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 1 Jun 2012 19:24:57 +0000
Subject: [PATCH] Add some tests checking that the verifier rejects cases where
 a definition doesn't dominate a use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157829 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Verifier/dominates.ll | 57 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 test/Verifier/dominates.ll

diff --git a/test/Verifier/dominates.ll b/test/Verifier/dominates.ll
new file mode 100644
index 00000000000..21aa7f6cd38
--- /dev/null
+++ b/test/Verifier/dominates.ll
@@ -0,0 +1,57 @@
+; RUN: not llvm-as < %s -o /dev/null |& FileCheck %s
+
+define i32 @f1(i32 %x) {
+       %y = add i32 %z, 1
+       %z = add i32 %x, 1
+       ret i32 %y
+; CHECK: Instruction does not dominate all uses!
+; CHECK-NEXT:  %z = add i32 %x, 1
+; CHECK-NEXT:  %y = add i32 %z, 1
+}
+
+declare i32 @g()
+define void @f2(i32 %x) {
+bb0:
+  %y1 = invoke i32 @g() to label %bb1 unwind label %bb2
+bb1:
+  ret void
+bb2:
+  %y2 = phi i32 [%y1, %bb0]
+  %y3 = landingpad i32 personality i32 ()* @g
+          cleanup
+  ret void
+; CHECK: Invoke result not available in the unwind destination!
+; CHECK-NEXT:  %y1 = invoke i32 @g()
+; CHECK-NEXT:        to label %bb1 unwind label %bb2
+; CHECK-NEXT:  %y2 = phi i32 [ %y1, %bb0 ]
+}
+
+define void @f3(i32 %x) {
+bb0:
+  %y1 = invoke i32 @g() to label %bb1 unwind label %bb2
+bb1:
+  ret void
+bb2:
+  %y2 = landingpad i32 personality i32 ()* @g
+          cleanup
+  br label %bb3
+bb3:
+  %y3 = phi i32 [%y1, %bb2]
+  ret void
+; CHECK: Invoke result does not dominate all uses!
+; CHECK-NEXT:  %y1 = invoke i32 @g()
+; CHECK-NEXT:          to label %bb1 unwind label %bb2
+; CHECK-NEXT:  %y3 = phi i32 [ %y1, %bb2 ]
+}
+
+define void @f4(i32 %x) {
+bb0:
+  br label %bb1
+bb1:
+  %y3 = phi i32 [%y1, %bb0]
+  %y1 = add i32 %x, 1
+  ret void
+; CHECK: Instruction does not dominate all uses!
+; CHECK-NEXT:  %y1 = add i32 %x, 1
+; CHECK-NEXT:  %y3 = phi i32 [ %y1, %bb0 ]
+}