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; RUN: opt -S -jump-threading < %s | FileCheck %s
; CHECK-LABEL: @f(
; CHECK-LABEL: entry
; CHECK-NEXT: ret void
;
; JumpThreading must detect the next two blocks are unreachable from entry
; and leave them alone. A subsequent pass will remove them from @f.
;
; CHECK: for.cond1:
; CHECK-NEXT: phi
; CHECK-NEXT: icmp
; CHECK-NEXT: br i1 %cmp, label %for.body, label %for.cond1
; CHECK: for.body:
; CHECK-NEXT: add
; CHECK-NEXT: icmp
; CHECK-NEXT: br i1 %a, label %for.cond1, label %for.cond1
define void @f() {
entry:
ret void
for.cond1:
%i.025 = phi i32 [ %inc, %for.body ], [ %inc, %for.body ], [ 1, %for.cond1 ]
%cmp = icmp slt i32 %i.025, 2
br i1 %cmp, label %for.body, label %for.cond1
for.body:
%inc = add nsw i32 %i.025, 0
%a = icmp ugt i32 %inc, 2
br i1 %a, label %for.cond1, label %for.cond1
}
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