Changes from Duncan's review:

 * merge two weak functions by making them both alias a third non-weak fn
 * don't reimplement CallSite::hasArgument
 * whitelist the safe linkage types


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58568 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/test/Transforms/MergeFunc/fold-weak.ll b/test/Transforms/MergeFunc/fold-weak.ll
new file mode 100644
index 0000000000..d98fde0228
--- /dev/null
+++ b/test/Transforms/MergeFunc/fold-weak.ll
@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | opt -mergefunc | llvm-dis | grep {alias weak} | count 2
+
+define weak i32 @sum(i32 %x, i32 %y) {
+  %sum = add i32 %x, %y
+  ret i32 %sum
+}
+
+define weak i32 @add(i32 %x, i32 %y) {
+  %sum = add i32 %x, %y
+  ret i32 %sum
+}