You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
1.0 KiB
33 lines
1.0 KiB
4 months ago
|
; RUN: opt < %s -scalar-evolution -analyze | FileCheck %s
|
||
|
|
; PR1597
|
||
|
|
|
||
|
|
; CHECK: Loop %bb: backedge-taken count is (-1 + (-1 * %x) + %y)
|
||
|
|
|
||
|
|
define i32 @f(i32 %x, i32 %y) {
|
||
|
|
entry:
|
||
|
|
%tmp63 = icmp ult i32 %x, %y ; <i1> [#uses=1]
|
||
|
|
br i1 %tmp63, label %bb.preheader, label %bb8
|
||
|
|
|
||
|
|
bb.preheader: ; preds = %entry
|
||
|
|
br label %bb
|
||
|
|
|
||
|
|
bb: ; preds = %bb3, %bb.preheader
|
||
|
|
%x_addr.0 = phi i32 [ %tmp2, %bb3 ], [ %x, %bb.preheader ] ; <i32> [#uses=1]
|
||
|
|
%tmp2 = add i32 %x_addr.0, 1 ; <i32> [#uses=3]
|
||
|
|
br label %bb3
|
||
|
|
|
||
|
|
bb3: ; preds = %bb
|
||
|
|
%tmp6 = icmp ult i32 %tmp2, %y ; <i1> [#uses=1]
|
||
|
|
br i1 %tmp6, label %bb, label %bb8.loopexit
|
||
|
|
|
||
|
|
bb8.loopexit: ; preds = %bb3
|
||
|
|
br label %bb8
|
||
|
|
|
||
|
|
bb8: ; preds = %bb8.loopexit, %entry
|
||
|
|
%x_addr.1 = phi i32 [ %x, %entry ], [ %tmp2, %bb8.loopexit ] ; <i32> [#uses=1]
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
return: ; preds = %bb8
|
||
|
|
ret i32 %x_addr.1
|
||
|
|
}
|