[MergeFunc] Add tests for merging weak_odr functions.

Author: fhahn

llvm/test/Transforms/MergeFunc/merge-weak-odr.ll

@@ -0,0 +1,100 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs --version 5
+; RUN: opt -p mergefunc -S %s | FileCheck %s
+
+define weak_odr hidden void @weak_odr_caller_of_foo_1(ptr %p) {
+entry:
+  tail call void @foo(ptr %p)
+  tail call void @foo(ptr %p)
+  tail call void @foo(ptr %p)
+  ret void
+}
+
+define weak_odr hidden void @weak_odr_caller_of_foo_2(ptr %p) {
+entry:
+  tail call void @foo(ptr %p)
+  tail call void @foo(ptr %p)
+  tail call void @foo(ptr %p)
+  ret void
+}
+
+declare void @foo(ptr)
+
+define hidden void @weak_odr_caller_of_bar_1(ptr %p) {
+entry:
+  tail call void @bar(ptr %p)
+  tail call void @bar(ptr %p)
+  tail call void @bar(ptr %p)
+  ret void
+}
+
+define weak_odr hidden void @non_weak_caller_of_bar_2(ptr %p) {
+entry:
+  tail call void @bar(ptr %p)
+  tail call void @bar(ptr %p)
+  tail call void @bar(ptr %p)
+  ret void
+}
+
+declare void @bar(ptr)
+
+define hidden void @non_weak_caller_of_zar_1(ptr %p) {
+entry:
+  tail call void @zar(ptr %p)
+  tail call void @zar(ptr %p)
+  tail call void @zar(ptr %p)
+  ret void
+}
+
+define weak_odr hidden void @weak_odr_caller_of_zar_2(ptr %p) {
+entry:
+  tail call void @zar(ptr %p)
+  tail call void @zar(ptr %p)
+  tail call void @zar(ptr %p)
+  ret void
+}
+
+declare void @zar(ptr)
+; CHECK-LABEL: define weak_odr hidden void @weak_odr_caller_of_foo_1(
+; CHECK-SAME: ptr [[P:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    tail call void @foo(ptr [[P]])
+; CHECK-NEXT:    tail call void @foo(ptr [[P]])
+; CHECK-NEXT:    tail call void @foo(ptr [[P]])
+; CHECK-NEXT:    ret void
+;
+;
+; CHECK-LABEL: define weak_odr hidden void @non_weak_caller_of_bar_2(
+; CHECK-SAME: ptr [[P:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    tail call void @bar(ptr [[P]])
+; CHECK-NEXT:    tail call void @bar(ptr [[P]])
+; CHECK-NEXT:    tail call void @bar(ptr [[P]])
+; CHECK-NEXT:    ret void
+;
+;
+; CHECK-LABEL: define hidden void @non_weak_caller_of_zar_1(
+; CHECK-SAME: ptr [[P:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    tail call void @zar(ptr [[P]])
+; CHECK-NEXT:    tail call void @zar(ptr [[P]])
+; CHECK-NEXT:    tail call void @zar(ptr [[P]])
+; CHECK-NEXT:    ret void
+;
+;
+; CHECK-LABEL: define weak_odr hidden void @weak_odr_caller_of_foo_2(
+; CHECK-SAME: ptr [[TMP0:%.*]]) {
+; CHECK-NEXT:    tail call void @weak_odr_caller_of_foo_1(ptr [[TMP0]])
+; CHECK-NEXT:    ret void
+;
+;
+; CHECK-LABEL: define hidden void @weak_odr_caller_of_bar_1(
+; CHECK-SAME: ptr [[TMP0:%.*]]) {
+; CHECK-NEXT:    tail call void @non_weak_caller_of_bar_2(ptr [[TMP0]])
+; CHECK-NEXT:    ret void
+;
+;
+; CHECK-LABEL: define weak_odr hidden void @weak_odr_caller_of_zar_2(
+; CHECK-SAME: ptr [[TMP0:%.*]]) {
+; CHECK-NEXT:    tail call void @non_weak_caller_of_zar_1(ptr [[TMP0]])
+; CHECK-NEXT:    ret void
+;