If the target of an alias has internal linkage, then the

alias can be morphed into the target.  Implement this
transform, and fix a crash in the existing transform at
the same time.

llvm-svn: 64583

2 files changed, 22 insertions, 0 deletions

diff --git a/llvm/test/Transforms/GlobalOpt/2009-02-15-BitcastAlias.ll b/llvm/test/Transforms/GlobalOpt/2009-02-15-BitcastAlias.ll
new file mode 100644
index 00000000000..e59c8df5570
--- /dev/null
+++ b/llvm/test/Transforms/GlobalOpt/2009-02-15-BitcastAlias.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | opt -globalopt
+
+@g = external global i32
+
+@a = alias bitcast (i32* @g to i8*)
+
+define void @f() {
+	%tmp = load i8* @a
+	ret void
+}
diff --git a/llvm/test/Transforms/GlobalOpt/2009-02-15-ResolveAlias.ll b/llvm/test/Transforms/GlobalOpt/2009-02-15-ResolveAlias.ll
new file mode 100644
index 00000000000..f042e59c19d
--- /dev/null
+++ b/llvm/test/Transforms/GlobalOpt/2009-02-15-ResolveAlias.ll
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | opt -globalopt | llvm-dis | grep {define void @a}
+
+define internal void @f() {
+	ret void
+}
+
+@a = alias void ()* @f
+
+define void @g() {
+	call void()* @a()
+	ret void
+}