Do not hoist instruction above branch condition. The instruction may use branch condition.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56286 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/SimplifyCFG/2008-09-17-SpeculativeHoist.ll

@@ -0,0 +1,18 @@
+; RUN: llvm-as < %s | opt -simplifycfg -disable-output
+; PR 2800
+
+define void @foo() {
+start:
+	%tmp = call i1 @bar( )		; <i1> [#uses=4]
+	br i1 %tmp, label %brtrue, label %brfalse
+
+brtrue:		; preds = %start
+	%tmpnew = and i1 %tmp, %tmp		; <i1> [#uses=1]
+	br label %brfalse
+
+brfalse:		; preds = %brtrue, %start
+	%andandtmp.0 = phi i1 [ %tmp, %start ], [ %tmpnew, %brtrue ]		; <i1> [#uses=0]
+	ret void
+}
+
+declare i1 @bar()