Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/JumpThreading/update-edge-weight.ll

@@ -0,0 +1,43 @@
+; RUN: opt -S -jump-threading %s | FileCheck %s
+
+; Test if edge weights are properly updated after jump threading.
+
+; CHECK: !2 = !{!"branch_weights", i32 1629125526, i32 518358122}
+
+define void @foo(i32 %n) !prof !0 {
+entry:
+  %cmp = icmp sgt i32 %n, 10
+  br i1 %cmp, label %if.then.1, label %if.else.1, !prof !1
+
+if.then.1:
+  tail call void @a()
+  br label %if.cond
+
+if.else.1:
+  tail call void @b()
+  br label %if.cond
+
+if.cond:
+  %cmp1 = icmp sgt i32 %n, 5
+  br i1 %cmp1, label %if.then.2, label %if.else.2, !prof !2
+
+if.then.2:
+  tail call void @c()
+  br label %if.end
+
+if.else.2:
+  tail call void @d()
+  br label %if.end
+
+if.end:
+  ret void
+}
+
+declare void @a()
+declare void @b()
+declare void @c()
+declare void @d()
+
+!0 = !{!"function_entry_count", i64 1}
+!1 = !{!"branch_weights", i32 10, i32 5}
+!2 = !{!"branch_weights", i32 10, i32 1}