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