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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=loop-idiom -S %s | FileCheck %s3 4; Make sure we do not delete instructions not inserted during expansion, e.g.5; because the expande re-used existing instructions.6 7define void @test(i64 %init, ptr %ptr) {8; CHECK-LABEL: @test(9; CHECK-NEXT: entry:10; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]11; CHECK: outer.header:12; CHECK-NEXT: [[J_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[OUTER_LATCH:%.*]] ]13; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[OUTER_LATCH]] ]14; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds float, ptr [[PTR:%.*]], i32 [[I_0]]15; CHECK-NEXT: br label [[INNER:%.*]]16; CHECK: inner:17; CHECK-NEXT: [[INNER_IV:%.*]] = phi i64 [ [[INNER_IV_NEXT:%.*]], [[INNER]] ], [ [[INIT:%.*]], [[OUTER_HEADER]] ]18; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[PTR]], i64 [[INNER_IV]]19; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX]], align 420; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds float, ptr [[ADD_PTR]], i64 [[INNER_IV]]21; CHECK-NEXT: store i32 [[TMP1]], ptr [[ARRAYIDX3]], align 422; CHECK-NEXT: [[INNER_IV_NEXT]] = add nsw i64 [[INNER_IV]], 123; CHECK-NEXT: [[EC_1:%.*]] = icmp eq i64 [[INNER_IV_NEXT]], 024; CHECK-NEXT: br i1 [[EC_1]], label [[OUTER_LATCH]], label [[INNER]]25; CHECK: outer.latch:26; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[J_0]], 127; CHECK-NEXT: [[ADD]] = add nuw nsw i32 [[I_0]], [[INC]]28; CHECK-NEXT: [[EC_2:%.*]] = icmp eq i32 [[ADD]], 400029; CHECK-NEXT: br i1 [[EC_2]], label [[EXIT:%.*]], label [[OUTER_HEADER]]30; CHECK: exit:31; CHECK-NEXT: ret void32;33entry:34 br label %outer.header35 36outer.header:37 %j.0 = phi i32 [ 0, %entry ], [ %inc, %outer.latch ]38 %i.0 = phi i32 [ 0, %entry ], [ %add, %outer.latch ]39 %add.ptr = getelementptr inbounds float, ptr %ptr, i32 %i.040 br label %inner41 42inner:43 %inner.iv = phi i64 [ %inner.iv.next, %inner ], [ %init, %outer.header ]44 %arrayidx = getelementptr inbounds float, ptr %ptr, i64 %inner.iv45 %0 = load i32, ptr %arrayidx, align 446 %arrayidx3 = getelementptr inbounds float, ptr %add.ptr, i64 %inner.iv47 store i32 %0, ptr %arrayidx3, align 448 %inner.iv.next = add nsw i64 %inner.iv, 149 %ec.1 = icmp eq i64 %inner.iv.next, 050 br i1 %ec.1, label %outer.latch, label %inner51 52outer.latch:53 %inc = add nuw nsw i32 %j.0, 154 %add = add nuw nsw i32 %i.0, %inc55 %ec.2 = icmp eq i32 %add, 400056 br i1 %ec.2, label %exit, label %outer.header57 58exit:59 ret void60}61