1 ;RUN: opt -S %s -indvars | FileCheck %s
4 ; CHECK-NOT: %lftr.wideiv = trunc i32 %indvars.iv.next to i16
5 ; CHECK: %exitcond = icmp ne i32 %indvars.iv, 511
6 define void @foo() #0 {
10 for.body: ; preds = %entry, %for.body
11 %i.01 = phi i16 [ 0, %entry ], [ %inc, %for.body ]
12 %conv2 = sext i16 %i.01 to i32
13 call void @bar(i32 %conv2) #1
14 %inc = add i16 %i.01, 1
15 %cmp = icmp slt i16 %inc, 512
16 br i1 %cmp, label %for.body, label %for.end
18 for.end: ; preds = %for.body
22 ; Check that post-incrementing the backedge taken count does not overflow.
23 ; CHECK-LABEL: @postinc(
24 ; CHECK: icmp eq i32 %indvars.iv, 255
25 define i32 @postinc() #0 {
29 do.body: ; preds = %do.body, %entry
30 %first.0 = phi i8 [ 0, %entry ], [ %inc, %do.body ]
31 %conv = zext i8 %first.0 to i32
32 call void @bar(i32 %conv) #1
33 %inc = add i8 %first.0, 1
34 %cmp = icmp eq i8 %first.0, -1
35 br i1 %cmp, label %do.end, label %do.body
37 do.end: ; preds = %do.body
41 declare void @bar(i32)
43 attributes #0 = { nounwind uwtable }
44 attributes #1 = { nounwind }