CastInst::castIsValid should return true if the dest type is the same as

Value's current type. The casting is trivial even for aggregate type.

llvm-svn: 172143

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/test/Transforms/MergeFunc/2013-01-10-MergeFuncAssert.ll b/llvm/test/Transforms/MergeFunc/2013-01-10-MergeFuncAssert.ll
new file mode 100644
index 00000000000..3f6a5ba157d
--- /dev/null
+++ b/llvm/test/Transforms/MergeFunc/2013-01-10-MergeFuncAssert.ll
@@ -0,0 +1,36 @@
+; RUN: opt -mergefunc -disable-output < %s
+; This used to trigger a ConstantExpr::getBitCast assertion.
+
+define void @t1() unnamed_addr uwtable ssp align 2 {
+entry:
+  switch i32 undef, label %sw.bb12 [
+    i32 127, label %sw.bb
+    i32 126, label %sw.bb4
+  ]
+
+sw.bb:                                            ; preds = %entry
+  unreachable
+
+sw.bb4:                                           ; preds = %entry
+  unreachable
+
+sw.bb12:                                          ; preds = %entry
+  ret void
+}
+
+define void @t2() unnamed_addr uwtable ssp align 2 {
+entry:
+  switch i32 undef, label %sw.bb8 [
+    i32 4, label %sw.bb
+    i32 3, label %sw.bb4
+  ]
+
+sw.bb:                                            ; preds = %entry
+  unreachable
+
+sw.bb4:                                           ; preds = %entry
+  ret void
+
+sw.bb8:                                           ; preds = %entry
+  unreachable
+}