Testcase for PR179

llvm-svn: 10455

llvm/test/Regression/Transforms/LICM/2003-12-13-VolatilePromote.ll

@@ -0,0 +1,17 @@
+; RUN: llvm-as < %s | opt -licm | llvm-dis | grep -C1 volatile | grep Loop
+
+%X = global int 7
+
+void %testfunc(int %i) {
+        br label %Loop
+
+Loop:
+        %x = volatile load int* %X  ; Should not promote this to a register
+        %x2 = add int %x, 1
+        store int %x2, int* %X
+        br bool true, label %Out, label %Loop
+
+Out:
+        ret void
+}
+