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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-flatten -verify-scev -S < %s | FileCheck %s
;
define void @sum_2d(ptr %p) {
; CHECK-LABEL: @sum_2d(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[FLATTEN_TRIPCOUNT:%.*]] = mul i16 1, 1
; CHECK-NEXT: br label [[OUTER:%.*]]
; CHECK: outer:
; CHECK-NEXT: [[SUM_04:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[DOTLCSSA:%.*]], [[OUTER_LATCH:%.*]] ]
; CHECK-NEXT: [[OUTER_IV:%.*]] = phi i16 [ 0, [[ENTRY]] ], [ [[OUTER_IV_NEXT:%.*]], [[OUTER_LATCH]] ]
; CHECK-NEXT: br label [[INNER:%.*]]
; CHECK: inner:
; CHECK-NEXT: [[SUM_12:%.*]] = phi i16 [ [[SUM_04]], [[OUTER]] ]
; CHECK-NEXT: [[INNER_IV:%.*]] = phi i16 [ 0, [[OUTER]] ]
; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr [[P:%.*]], align 1
; CHECK-NEXT: [[INNER_IV_NEXT:%.*]] = add nsw i16 [[INNER_IV]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i16 [[INNER_IV]], 0
; CHECK-NEXT: br label [[OUTER_LATCH]]
; CHECK: outer.latch:
; CHECK-NEXT: [[DOTLCSSA]] = phi i16 [ [[TMP0]], [[INNER]] ]
; CHECK-NEXT: [[OUTER_IV_NEXT]] = add nsw i16 [[OUTER_IV]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i16 [[OUTER_IV_NEXT]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT: br i1 [[CMP]], label [[OUTER]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %outer
outer: ; preds = %outer.latch, %entry
%sum.04 = phi i16 [ 0, %entry ], [ %0, %outer.latch ]
%outer.iv = phi i16 [ 0, %entry ], [ %outer.iv.next, %outer.latch ]
br label %inner
inner: ; preds = %inner, %outer
%sum.12 = phi i16 [ %sum.04, %outer ], [ %0, %inner ]
%inner.iv = phi i16 [ 0, %outer ], [ %inner.iv.next, %inner ]
%0 = load i16, ptr %p, align 1
%inner.iv.next = add nsw i16 %inner.iv, 1
%cmp2 = icmp slt i16 %inner.iv, 0
br i1 %cmp2, label %inner, label %outer.latch
outer.latch: ; preds = %inner
%outer.iv.next = add nsw i16 %outer.iv, 1
%cmp = icmp slt i16 %outer.iv.next, 0
br i1 %cmp, label %outer, label %exit
exit: ; preds = %outer.latch
ret void
}
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