1 ;RUN: opt -S %s -indvars | FileCheck %s 2 3 ; Provide legal integer types. 4 target datalayout = "n8:16:32:64" 5 6 7 ; CHECK-LABEL: @foo( 8 ; CHECK-NOT: %lftr.wideiv = trunc i32 %indvars.iv.next to i16 9 ; CHECK: %exitcond = icmp ne i32 %indvars.iv.next, 512 10 define void @foo() #0 { 11 entry: 12 br label %for.body 13 14 for.body: ; preds = %entry, %for.body 15 %i.01 = phi i16 [ 0, %entry ], [ %inc, %for.body ] 16 %conv2 = sext i16 %i.01 to i32 17 call void @bar(i32 %conv2) #1 18 %inc = add i16 %i.01, 1 19 %cmp = icmp slt i16 %inc, 512 20 br i1 %cmp, label %for.body, label %for.end 21 22 for.end: ; preds = %for.body 23 ret void 24 } 25 26 ; Check that post-incrementing the backedge taken count does not overflow. 27 ; CHECK-LABEL: @postinc( 28 ; CHECK: icmp eq i32 %indvars.iv, 255 29 define i32 @postinc() #0 { 30 entry: 31 br label %do.body 32 33 do.body: ; preds = %do.body, %entry 34 %first.0 = phi i8 [ 0, %entry ], [ %inc, %do.body ] 35 %conv = zext i8 %first.0 to i32 36 call void @bar(i32 %conv) #1 37 %inc = add i8 %first.0, 1 38 %cmp = icmp eq i8 %first.0, -1 39 br i1 %cmp, label %do.end, label %do.body 40 41 do.end: ; preds = %do.body 42 ret i32 0 43 } 44 45 declare void @bar(i32) 46 47 attributes #0 = { nounwind uwtable } 48 attributes #1 = { nounwind } 49
