Home | History | Annotate | Download | only in IndVarSimplify 
      1 ;; RUN: opt -S < %s -indvars | FileCheck %s
      2 
      3 ;; Check if IndVarSimplify understands !range metadata.
      4 
      5 declare void @abort()
      6 
      7 define i1 @iterate(i32* nocapture readonly %buffer) {
      8 entry:
      9   %length = load i32, i32* %buffer, !range !0
     10   br label %loop.preheader
     11 
     12 loop.preheader:
     13   br label %loop
     14 
     15 loop:
     16   %idx = phi i32 [ %idx.inc, %loop.next ], [ 0, %loop.preheader ]
     17   %oob.pred = icmp slt i32 %idx, %length
     18   br i1 %oob.pred, label %loop.next, label %oob
     19 ; CHECK: br i1 true, label %loop.next, label %oob
     20 
     21 loop.next:
     22   %idx.inc = add i32 %idx, 1
     23   %exit.pred = icmp slt i32 %idx.inc, %length
     24   br i1 %exit.pred, label %loop, label %abort.loopexit
     25 
     26 abort.loopexit:
     27   br label %abort
     28 
     29 abort:
     30   ret i1 false
     31 
     32 oob:
     33   tail call void @abort()
     34   ret i1 false
     35 }
     36 
     37 !0 = !{i32 1, i32 100}
     38