Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/test/CodeGen/X86/tail-dup-no-other-successor.ll

@@ -1,53 +0,0 @@
-; RUN: llc -O3 -o - %s | FileCheck %s
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-declare void @effect(i32);
-
-; After the loop gets laid out, loop.end is the only successor, but can't be
-; laid out because of the CFG dependency from top.fakephi. The calculations show
-; that it isn't profitable to tail-duplicate in this case, because of the
-; effects on fallthrough from %loop.end
-; CHECK-LABEL: {{^}}no_successor_still_no_taildup:
-; CHECK: %entry
-; CHECK: %loop.top
-; CHECK: %loop.latch
-; CHECK: %top.fakephi
-; CHECK: %loop.end
-; CHECK: %false
-; CHECK: %ret
-define void @no_successor_still_no_taildup (i32 %count, i32 %key) {
-entry:
-  br label %loop.top
-
-loop.top:
-  %i.loop.top = phi i32 [ %count, %entry ], [ %i.latch, %loop.latch ]
-  %cmp.top = icmp eq i32 %i.loop.top, %key
-  call void @effect(i32 0)
-  br i1 %cmp.top, label %top.fakephi, label %loop.latch, !prof !1
-
-loop.latch:
-  %i.latch = sub i32 %i.loop.top, 1
-  %cmp.latch = icmp eq i32 %i.latch, 0
-  call void @effect(i32 1)
-  br i1 %cmp.top, label %loop.top, label %loop.end, !prof !2
-
-top.fakephi:
-  call void @effect(i32 2)
-  br label %loop.end
-
-loop.end:
-  %cmp.end = icmp eq i32 %count, 0
-  br i1 %cmp.end, label %ret, label %false, !prof !3
-
-false:
-  call void @effect(i32 4)
-  br label %ret
-
-ret:
-  ret void
-}
-
-!1 = !{!"branch_weights", i32 1, i32 1}
-!2 = !{!"branch_weights", i32 5, i32 1}
-!3 = !{!"branch_weights", i32 1, i32 2}