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; RUN: opt -passes='loop(loop-instsimplify,loop-simplifycfg,simple-loop-unswitch),verify<loops>' -S < %s | FileCheck %s
; RUN: opt -verify-memoryssa -passes='loop-mssa(loop-instsimplify,loop-simplifycfg,simple-loop-unswitch),verify<loops>' -S < %s | FileCheck %s
declare void @some_func() noreturn
define i32 @test1(ptr %var, i1 %cond1, i1 %cond2) {
; CHECK-LABEL: @test1(
entry:
br label %loop_begin
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 %{{.*}}, label %entry.split, label %loop_exit.split
;
; CHECK: entry.split:
; CHECK-NEXT: br i1 %{{.*}}, label %entry.split.split, label %loop_exit
;
; CHECK: entry.split.split:
; CHECK-NEXT: br label %loop_begin
loop_begin:
br i1 %cond1, label %continue, label %loop_exit ; first trivial condition
continue:
%var_val = load i32, ptr %var
%var_cond = trunc i32 %var_val to i1
%maybe_cond = select i1 %cond1, i1 %cond2, i1 %var_cond
br i1 %maybe_cond, label %do_something, label %loop_exit ; second trivial condition
do_something:
call void @some_func() noreturn nounwind
br label %loop_begin
; CHECK: loop_begin:
; CHECK-NEXT: call
; CHECK-NEXT: br label %loop_begin
loop_exit:
ret i32 0
; CHECK: loop_exit:
; CHECK-NEXT: br label %loop_exit.split
;
; CHECK: loop_exit.split:
; CHECK-NEXT: ret
}
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