new testcase that crashes global opt, reduced from chomp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31351 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/GlobalOpt/2006-11-01-ShrinkGlobalPhiCrash.ll b/test/Transforms/GlobalOpt/2006-11-01-ShrinkGlobalPhiCrash.ll
new file mode 100644 (file)
index 0000000..bba399a
--- /dev/null
+++ b/test/Transforms/GlobalOpt/2006-11-01-ShrinkGlobalPhiCrash.ll
@@ -0,0 +1,33 @@
+; RUN: llvm-as < %s | opt -globalopt -disable-output
+       %struct._list = type { int*, %struct._list* }
+       %struct._play = type { int, int*, %struct._list*, %struct._play* }
+%nrow = internal global int 0          ; <int*> [#uses=2]
+
+implementation   ; Functions:
+
+void %make_play() {
+entry:
+       br label %cond_true16.i
+
+cond_true16.i:         ; preds = %cond_true16.i, %entry
+       %low.0.in.i.0 = phi int* [ %nrow, %entry ], [ null, %cond_true16.i ]            ; <int*> [#uses=1]
+       %low.0.i = load int* %low.0.in.i.0              ; <int> [#uses=0]
+       br label %cond_true16.i
+}
+
+void %make_wanted() {
+entry:
+       unreachable
+}
+
+void %get_good_move() {
+entry:
+       ret void
+}
+
+void %main() {
+entry:
+       store int 8, int* %nrow
+       tail call void %make_play( )
+       ret void
+}