Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/Transforms/InstCombine/2007-09-17-AliasConstFold2.ll

@@ -0,0 +1,16 @@
+; RUN: opt < %s -instcombine -S | grep icmp
+; PR1678
+
+@A = weak alias void (), void ()* @B		; <void ()*> [#uses=1]
+
+define weak void @B() {
+       ret void
+}
+
+define i32 @active() {
+entry:
+	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
+	%tmp1 = icmp ne void ()* @A, null		; <i1> [#uses=1]
+	%tmp12 = zext i1 %tmp1 to i32		; <i32> [#uses=1]
+	ret i32 %tmp12
+}