From fa93d0e1c661693a9940deaef4d03d15988ae9b3 Mon Sep 17 00:00:00 2001
From: Sanjoy Das <sanjoy@playingwithpointers.com>
Date: Fri, 15 May 2015 00:26:21 +0000
Subject: [PATCH] [PlaceSafepoints] Fix a bug that came in with rL236672.

Transfer the calling convention from the invoke being replaced by
PlaceStatepoints to the new invoke to gc.statepoint created.  Add a test
case that would have caught this issue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237414 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/PlaceSafepoints.cpp          |  2 ++
 .../statepoint-calling-conventions.ll              | 42 ++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 test/Transforms/PlaceSafepoints/statepoint-calling-conventions.ll

diff --git a/lib/Transforms/Scalar/PlaceSafepoints.cpp b/lib/Transforms/Scalar/PlaceSafepoints.cpp
index 53eed86b81f..319e5c79da4 100644
--- a/lib/Transforms/Scalar/PlaceSafepoints.cpp
+++ b/lib/Transforms/Scalar/PlaceSafepoints.cpp
@@ -951,6 +951,8 @@ static Value *ReplaceWithStatepoint(const CallSite &CS, /* to replace */
         ToReplace->getUnwindDest(), makeArrayRef(CS.arg_begin(), CS.arg_end()),
         None, None, "safepoint_token");
 
+    Invoke->setCallingConv(ToReplace->getCallingConv());
+
     // In case if we can handle this set of attributes - set up function
     // attributes directly on statepoint and return attributes later for
     // gc_result intrinsic.
diff --git a/test/Transforms/PlaceSafepoints/statepoint-calling-conventions.ll b/test/Transforms/PlaceSafepoints/statepoint-calling-conventions.ll
new file mode 100644
index 00000000000..e31c2aa5166
--- /dev/null
+++ b/test/Transforms/PlaceSafepoints/statepoint-calling-conventions.ll
@@ -0,0 +1,42 @@
+; RUN: opt -place-safepoints -S < %s | FileCheck %s
+
+; Ensure that the gc.statepoint calls / invokes we generate carry over
+; the right calling conventions.
+
+define i64 addrspace(1)* @test_invoke_format(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj1) gc "statepoint-example" {
+; CHECK-LABEL: @test_invoke_format(
+; CHECK-LABEL: entry:
+; CHECK: invoke coldcc i32 (i64, i32, i64 addrspace(1)* (i64 addrspace(1)*)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_p1i64p1i64f(i64 2882400000, i32 0, i64 addrspace(1)* (i64 addrspace(1)*)* @callee, i32 1, i32 0, i64 addrspace(1)* %obj, i32 0, i32 0)
+entry:
+  %ret_val = invoke coldcc i64 addrspace(1)* @callee(i64 addrspace(1)* %obj)
+               to label %normal_return unwind label %exceptional_return
+
+normal_return:
+  ret i64 addrspace(1)* %ret_val
+
+exceptional_return:
+  %landing_pad4 = landingpad {i8*, i32} personality i32 ()* @personality
+          cleanup
+  ret i64 addrspace(1)* %obj1
+}
+
+define i64 addrspace(1)* @test_call_format(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj1) gc "statepoint-example" {
+; CHECK-LABEL: @test_call_format(
+; CHECK-LABEL: entry:
+; CHECK: call coldcc i32 (i64, i32, i64 addrspace(1)* (i64 addrspace(1)*)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_p1i64p1i64f(i64 2882400000, i32 0, i64 addrspace(1)* (i64 addrspace(1)*)* @callee, i32 1, i32 0, i64 addrspace(1)* %obj, i32 0, i32 0)
+entry:
+  %ret_val = call coldcc i64 addrspace(1)* @callee(i64 addrspace(1)* %obj)
+  ret i64 addrspace(1)* %ret_val
+}
+
+; This function is inlined when inserting a poll.
+declare void @do_safepoint()
+define void @gc.safepoint_poll() {
+; CHECK-LABEL: gc.safepoint_poll
+entry:
+  call void @do_safepoint()
+  ret void
+}
+
+declare coldcc i64 addrspace(1)* @callee(i64 addrspace(1)*)
+declare i32 @personality()
-- 
2.11.0