[hot-cold-split] Name split functions with ".cold" suffix

Summary:
The current default of appending "_"+entry block label to the new
extracted cold function breaks demangling. Change the deliminator from
"_" to "." to enable demangling. Because the header block label will
be empty for release compile code, use "extracted" after the "." when
the label is empty.

Additionally, add a mechanism for the client to pass in an alternate
suffix applied after the ".", and have the hot cold split pass use
"cold."+Count, where the Count is currently 1 but can be used to
uniquely number multiple cold functions split out from the same function
with D53588.

Reviewers: sebpop, hiraditya

Subscribers: llvm-commits, erik.pilkington

Differential Revision: https://reviews.llvm.org/D53534

llvm-svn: 345178

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/test/Transforms/CodeExtractor/PartialInlineAnd.ll b/llvm/test/Transforms/CodeExtractor/PartialInlineAnd.ll
index d32d834d2df..6d555b740e5 100644
--- a/llvm/test/Transforms/CodeExtractor/PartialInlineAnd.ll
+++ b/llvm/test/Transforms/CodeExtractor/PartialInlineAnd.ll
@@ -41,11 +41,11 @@ bb:
 ; CHECK-LABEL: @dummy_caller
 ; CHECK: br i1
 ; CHECK: br i1
-; CHECK: call void @bar.1_
+; CHECK: call void @bar.1.
 ; LIMIT-LABEL: @dummy_caller
 ; LIMIT: br i1
 ; LIMIT-NOT: br
-; LIMIT: call void @bar.1_
+; LIMIT: call void @bar.1.
   %tmp = tail call i32 @bar(i32 %arg)
   ret i32 %tmp
 }