1 ;; RUN: opt -S < %s -indvars | FileCheck %s
3 ;; Check if llvm can narrow !range metadata based on loop entry
8 define i1 @bounded_below(i32* nocapture readonly %buffer) {
10 %length = load i32* %buffer, !range !0
11 %entry.pred = icmp eq i32 %length, 0
12 br i1 %entry.pred, label %abort, label %loop.preheader
18 %idx = phi i32 [ %idx.inc, %loop.next ], [ 0, %loop.preheader ]
19 %oob.pred = icmp slt i32 %idx, %length
20 br i1 %oob.pred, label %loop.next, label %oob
21 ; CHECK: br i1 true, label %loop.next, label %oob
24 %idx.inc = add i32 %idx, 1
25 %exit.pred = icmp slt i32 %idx.inc, %length
26 br i1 %exit.pred, label %loop, label %abort.loopexit
35 tail call void @abort()
39 !0 = metadata !{i32 0, i32 100}