Add new test to make sure simplifycfg doesn't leave around trivially
dead instructions.
llvm-svn: 19211
diff --git a/llvm/test/Regression/Transforms/SimplifyCFG/DeadSetCC.ll b/llvm/test/Regression/Transforms/SimplifyCFG/DeadSetCC.ll
new file mode 100644
index 0000000..70ccfc8
--- /dev/null
+++ b/llvm/test/Regression/Transforms/SimplifyCFG/DeadSetCC.ll
@@ -0,0 +1,26 @@
+; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | not grep seteq
+
+; Check that simplifycfg deletes a dead 'seteq' instruction when it
+; folds a conditional branch into a switch instruction.
+
+declare void %foo()
+declare void %bar()
+
+void %testcfg(uint %V) {
+ %C = seteq uint %V, 18
+ %D = seteq uint %V, 180
+ %E = or bool %C, %D
+ br bool %E, label %L1, label %Sw
+Sw:
+ switch uint %V, label %L1 [
+ uint 15, label %L2
+ uint 16, label %L2
+ ]
+L1:
+ call void %foo()
+ ret void
+L2:
+ call void %bar()
+ ret void
+}
+