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; RUN: opt < %s -passes=simple-loop-unswitch -verify-memoryssa -S 2>&1 | FileCheck %s
; This is to test trivial loop unswitch only happens when trivial condition
; itself is an LIV loop condition (not partial LIV which could occur in and/or).
define i32 @test(i1 %cond1, i32 %var1) {
; CHECK-LABEL: define i32 @test(
entry:
br label %loop_begin
; CHECK-NEXT: entry:
; CHECK-NEXT: [[FROZEN:%.+]] = freeze i1 %cond1
; CHECK-NEXT: br i1 [[FROZEN]], label %entry.split, label %loop_exit.split
;
; CHECK: entry.split:
; CHECK-NEXT: br label %loop_begin
loop_begin:
%var3 = phi i32 [%var1, %entry], [%var2, %do_something]
%cond2 = icmp eq i32 %var3, 10
%cond.and = and i1 %cond1, %cond2
br i1 %cond.and, label %do_something, label %loop_exit
; CHECK: loop_begin:
; CHECK-NEXT: %[[VAR3:.*]] = phi i32
; CHECK-NEXT: %[[COND2:.*]] = icmp eq i32 %[[VAR3]], 10
; CHECK-NEXT: %[[COND_AND:.*]] = and i1 true, %[[COND2]]
; CHECK-NEXT: br i1 %[[COND_AND]], label %do_something, label %loop_exit
do_something:
%var2 = add i32 %var3, 1
call void @some_func() noreturn nounwind
br label %loop_begin
loop_exit:
ret i32 0
}
declare void @some_func() noreturn
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