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;RUN: opt -S %s -indvars | FileCheck %s
; CHECK-LABEL: @foo(
; CHECK-NOT: %lftr.wideiv = trunc i32 %indvars.iv.next to i16
; CHECK: %exitcond = icmp ne i32 %indvars.iv.next, 512
define void @foo() #0 {
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.01 = phi i16 [ 0, %entry ], [ %inc, %for.body ]
%conv2 = sext i16 %i.01 to i32
call void @bar(i32 %conv2) #1
%inc = add i16 %i.01, 1
%cmp = icmp slt i16 %inc, 512
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body
ret void
}
; Check that post-incrementing the backedge taken count does not overflow.
; CHECK-LABEL: @postinc(
; CHECK: icmp eq i32 %indvars.iv.next, 256
define i32 @postinc() #0 {
entry:
br label %do.body
do.body: ; preds = %do.body, %entry
%first.0 = phi i8 [ 0, %entry ], [ %inc, %do.body ]
%conv = zext i8 %first.0 to i32
call void @bar(i32 %conv) #1
%inc = add i8 %first.0, 1
%cmp = icmp eq i8 %first.0, -1
br i1 %cmp, label %do.end, label %do.body
do.end: ; preds = %do.body
ret i32 0
}
declare void @bar(i32)
attributes #0 = { nounwind uwtable }
attributes #1 = { nounwind }
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