Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/CodeGen/X86/code_placement_loop_rotation3.ll

@@ -0,0 +1,42 @@
+; RUN: llc -mcpu=corei7 -mtriple=x86_64-linux -force-precise-rotation-cost < %s | FileCheck %s
+
+define void @bar()  {
+; Test that all edges in the loop chain are fall through with profile data.
+;
+; CHECK-LABEL: bar:
+; CHECK: latch
+; CHECK: header
+; CHECK: if.then
+; CHECK: end
+
+entry:
+  br label %header
+
+header:
+  call void @e()
+  %call = call zeroext i1 @a()
+  br i1 %call, label %if.then, label %latch, !prof !1
+
+if.then:
+  call void @f()
+  %call3 = call zeroext i1 @a()
+  br i1 %call3, label %latch, label %end, !prof !2
+
+latch:
+  call void @h()
+  %call2 = call zeroext i1 @a()
+  br i1 %call2, label %header, label %end, !prof !3
+
+end:
+  ret void
+}
+
+declare zeroext i1 @a()
+declare void @e()
+declare void @f()
+declare void @g()
+declare void @h()
+
+!1 = !{!"branch_weights", i32 16, i32 16}
+!2 = !{!"branch_weights", i32 97, i32 3}
+!3 = !{!"branch_weights", i32 97, i32 3}