blob: bf4b68c1d2e92eb1849652ca5d4efa5a8e4e3718 [file] [log] [blame]
; RUN: opt < %s -loop-unswitch -loop-unswitch-threshold=0 -S 2>&1 | FileCheck %s
; RUN: opt < %s -loop-unswitch -loop-unswitch-threshold=0 -enable-mssa-loop-dependency=true -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) {
br label %loop_begin
%var3 = phi i32 [%var1, %entry], [%var2, %do_something]
%cond2 = icmp eq i32 %var3, 10
%cond.and = and i1 %cond1, %cond2
; %cond.and only has %cond1 as LIV so no unswitch should happen.
; CHECK: br i1 %cond.and, label %do_something, label %loop_exit
br i1 %cond.and, label %do_something, label %loop_exit
%var2 = add i32 %var3, 1
call void @some_func() noreturn nounwind
br label %loop_begin
ret i32 0
declare void @some_func() noreturn