Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/test/Transforms/RewriteStatepointsForGC/call-gc-result.ll

@@ -0,0 +1,39 @@
+;; RUN: opt < %s -rewrite-statepoints-for-gc -S | FileCheck %s
+;; RUN: opt < %s -passes=rewrite-statepoints-for-gc -S | FileCheck %s
+
+;; This test is to verify that gc_result from a call statepoint
+;; can have preceding phis in its parent basic block. Unlike
+;; invoke statepoint, call statepoint does not terminate the
+;; block, and thus its gc_result is in the same block with the
+;; call statepoint.
+
+declare i32 @foo()
+
+define i32 @test1(i1 %cond, i32 %a) gc "statepoint-example" {
+entry:
+  br i1 %cond, label %branch1, label %branch2
+  
+branch1:
+  %b = add i32 %a, 1
+  br label %merge
+ 
+branch2:
+  br label %merge
+
+merge:
+;; CHECK: 		%phi = phi i32 [ %a, %branch2 ], [ %b, %branch1 ]
+;; CHECK-NEXT:  [[TOKEN:%[^ ]+]] = call token (i64, i32, i32 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i32f(i64 2882400000, i32 0, i32 ()* @foo, i32 0, i32 0, i32 0, i32 0
+;; CHECK-NEXT:  call i32 @llvm.experimental.gc.result.i32(token [[TOKEN]])
+  %phi = phi i32 [ %a, %branch2 ], [ %b, %branch1 ]
+  %ret = call i32 @foo()
+  ret i32 %ret
+}
+
+; 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
+}