1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=loop-flatten -verify-scev -S < %s | FileCheck %s 3; 4define void @sum_2d(ptr %p) { 5; CHECK-LABEL: @sum_2d( 6; CHECK-NEXT: entry: 7; CHECK-NEXT: [[FLATTEN_TRIPCOUNT:%.*]] = mul i16 1, 1 8; CHECK-NEXT: br label [[OUTER:%.*]] 9; CHECK: outer: 10; CHECK-NEXT: [[SUM_04:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[DOTLCSSA:%.*]], [[OUTER_LATCH:%.*]] ] 11; CHECK-NEXT: [[OUTER_IV:%.*]] = phi i16 [ 0, [[ENTRY]] ], [ [[OUTER_IV_NEXT:%.*]], [[OUTER_LATCH]] ] 12; CHECK-NEXT: br label [[INNER:%.*]] 13; CHECK: inner: 14; CHECK-NEXT: [[SUM_12:%.*]] = phi i16 [ [[SUM_04]], [[OUTER]] ] 15; CHECK-NEXT: [[INNER_IV:%.*]] = phi i16 [ 0, [[OUTER]] ] 16; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr [[P:%.*]], align 1 17; CHECK-NEXT: [[INNER_IV_NEXT:%.*]] = add nsw i16 [[INNER_IV]], 1 18; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i16 [[INNER_IV]], 0 19; CHECK-NEXT: br label [[OUTER_LATCH]] 20; CHECK: outer.latch: 21; CHECK-NEXT: [[DOTLCSSA]] = phi i16 [ [[TMP0]], [[INNER]] ] 22; CHECK-NEXT: [[OUTER_IV_NEXT]] = add nsw i16 [[OUTER_IV]], 1 23; CHECK-NEXT: [[CMP:%.*]] = icmp slt i16 [[OUTER_IV_NEXT]], [[FLATTEN_TRIPCOUNT]] 24; CHECK-NEXT: br i1 [[CMP]], label [[OUTER]], label [[EXIT:%.*]] 25; CHECK: exit: 26; CHECK-NEXT: ret void 27; 28entry: 29 br label %outer 30 31outer: ; preds = %outer.latch, %entry 32 %sum.04 = phi i16 [ 0, %entry ], [ %0, %outer.latch ] 33 %outer.iv = phi i16 [ 0, %entry ], [ %outer.iv.next, %outer.latch ] 34 br label %inner 35 36inner: ; preds = %inner, %outer 37 %sum.12 = phi i16 [ %sum.04, %outer ], [ %0, %inner ] 38 %inner.iv = phi i16 [ 0, %outer ], [ %inner.iv.next, %inner ] 39 %0 = load i16, ptr %p, align 1 40 %inner.iv.next = add nsw i16 %inner.iv, 1 41 %cmp2 = icmp slt i16 %inner.iv, 0 42 br i1 %cmp2, label %inner, label %outer.latch 43 44outer.latch: ; preds = %inner 45 %outer.iv.next = add nsw i16 %outer.iv, 1 46 %cmp = icmp slt i16 %outer.iv.next, 0 47 br i1 %cmp, label %outer, label %exit 48 49exit: ; preds = %outer.latch 50 ret void 51} 52