1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -lcssa -loop-simplify -indvars -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 3*9880d681SAndroid Build Coastguard Workertarget triple = "x86_64-unknown-unknown" 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Worker@a = external global i32, align 4 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; Check that loop-simplify merges two loop exits, but preserves LCSSA form. 8*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @foo 9*9880d681SAndroid Build Coastguard Worker; CHECK: for: 10*9880d681SAndroid Build Coastguard Worker; CHECK: %or.cond = and i1 %cmp1, %cmp2 11*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: for.cond: 12*9880d681SAndroid Build Coastguard Worker; CHECK: for.end: 13*9880d681SAndroid Build Coastguard Worker; CHECK: %a.lcssa = phi i32 [ %a, %for ] 14*9880d681SAndroid Build Coastguard Workerdefine i32 @foo(i32 %x) { 15*9880d681SAndroid Build Coastguard Workerentry: 16*9880d681SAndroid Build Coastguard Worker br label %for 17*9880d681SAndroid Build Coastguard Worker 18*9880d681SAndroid Build Coastguard Workerfor: 19*9880d681SAndroid Build Coastguard Worker %iv = phi i32 [ 0, %entry ], [ %iv.next, %for.cond ] 20*9880d681SAndroid Build Coastguard Worker %cmp1 = icmp eq i32 %x, 0 21*9880d681SAndroid Build Coastguard Worker %iv.next = add nuw nsw i32 %iv, 1 22*9880d681SAndroid Build Coastguard Worker %a = load i32, i32* @a 23*9880d681SAndroid Build Coastguard Worker br i1 %cmp1, label %for.cond, label %for.end 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Workerfor.cond: 26*9880d681SAndroid Build Coastguard Worker %cmp2 = icmp slt i32 %iv.next, 4 27*9880d681SAndroid Build Coastguard Worker br i1 %cmp2, label %for, label %for.end 28*9880d681SAndroid Build Coastguard Worker 29*9880d681SAndroid Build Coastguard Workerfor.end: 30*9880d681SAndroid Build Coastguard Worker %a.lcssa = phi i32 [ %a, %for ], [ %a, %for.cond ] 31*9880d681SAndroid Build Coastguard Worker ret i32 %a.lcssa 32*9880d681SAndroid Build Coastguard Worker} 33