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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 62; RUN: opt < %s -passes=loop-interchange -cache-line-size=64 -verify-dom-info -verify-loop-info -verify-scev -verify-loop-lcssa -S | FileCheck %s3 4; This test is checking that blocks outer.body and outer.latch, where outer.body is the exit5; block of the inner loop and outer.latch the latch of the outer loop, correctly6; deal with the phi-node use-def chain %new.cond.lcssa -> %old.cond.lcssa. What we expect7; here is that block outer.latch does not contain a phi node, because it is a single input8; phi in a non-exit block.9 10target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"11 12define i16 @main(ptr %a) {13; CHECK-LABEL: define i16 @main(14; CHECK-SAME: ptr [[A:%.*]]) {15; CHECK-NEXT: [[ENTRY:.*:]]16; CHECK-NEXT: br label %[[INNER_HEADER_PREHEADER:.*]]17; CHECK: [[OUTER_HEADER_PREHEADER:.*]]:18; CHECK-NEXT: br label %[[OUTER_HEADER:.*]]19; CHECK: [[OUTER_HEADER]]:20; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], %[[OUTER_LATCH:.*]] ], [ 1, %[[OUTER_HEADER_PREHEADER]] ]21; CHECK-NEXT: br label %[[INNER_HEADER_SPLIT:.*]]22; CHECK: [[INNER_HEADER_PREHEADER]]:23; CHECK-NEXT: br label %[[INNER_HEADER:.*]]24; CHECK: [[INNER_HEADER]]:25; CHECK-NEXT: [[J:%.*]] = phi i16 [ [[TMP1:%.*]], %[[INNER_LATCH_SPLIT:.*]] ], [ 0, %[[INNER_HEADER_PREHEADER]] ]26; CHECK-NEXT: br label %[[OUTER_HEADER_PREHEADER]]27; CHECK: [[INNER_HEADER_SPLIT]]:28; CHECK-NEXT: [[ARRAYIDX_US_US:%.*]] = getelementptr i16, ptr [[A]], i16 [[J]]29; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr [[ARRAYIDX_US_US]], align 130; CHECK-NEXT: [[COND:%.*]] = select i1 false, i16 0, i16 031; CHECK-NEXT: br label %[[INNER_LATCH:.*]]32; CHECK: [[INNER_LATCH]]:33; CHECK-NEXT: [[J_NEXT:%.*]] = add i16 [[J]], 134; CHECK-NEXT: [[CMP:%.*]] = icmp slt i16 [[J]], 4235; CHECK-NEXT: br label %[[OUTER_BODY:.*]]36; CHECK: [[INNER_LATCH_SPLIT]]:37; CHECK-NEXT: [[NEW_COND_LCSSA:%.*]] = phi i16 [ [[COND]], %[[OUTER_LATCH]] ]38; CHECK-NEXT: [[TMP1]] = add i16 [[J]], 139; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i16 [[J]], 4240; CHECK-NEXT: br i1 [[TMP2]], label %[[INNER_HEADER]], label %[[EXIT:.*]]41; CHECK: [[OUTER_BODY]]:42; CHECK-NEXT: br label %[[OUTER_LATCH]]43; CHECK: [[OUTER_LATCH]]:44; CHECK-NEXT: [[I_NEXT]] = add i64 [[I]], 145; CHECK-NEXT: [[CMP286_US:%.*]] = icmp ugt i64 [[I]], 046; CHECK-NEXT: br i1 [[CMP286_US]], label %[[OUTER_HEADER]], label %[[INNER_LATCH_SPLIT]]47; CHECK: [[EXIT]]:48; CHECK-NEXT: [[OLD_COND_LCSSA_LCSSA:%.*]] = phi i16 [ [[NEW_COND_LCSSA]], %[[INNER_LATCH_SPLIT]] ]49; CHECK-NEXT: ret i16 [[OLD_COND_LCSSA_LCSSA]]50;51entry:52 br label %outer.header53 54outer.header:55 %i = phi i64 [ 1, %entry ], [ %i.next, %outer.latch ]56 br label %inner.header57 58inner.header:59 %j = phi i16 [ 0, %outer.header ], [ %j.next, %inner.latch ]60 %arrayidx.us.us = getelementptr i16, ptr %a, i16 %j61 %0 = load i16, ptr %arrayidx.us.us, align 162 %cond = select i1 false, i16 0, i16 063 br label %inner.latch64 65inner.latch:66 %j.next = add i16 %j, 167 %cmp = icmp slt i16 %j, 4268 br i1 %cmp, label %inner.header, label %outer.body69 70outer.body:71 %new.cond.lcssa = phi i16 [ %cond, %inner.latch ]72 br label %outer.latch73 74outer.latch:75 %old.cond.lcssa = phi i16 [ %new.cond.lcssa, %outer.body ]76 %i.next = add i64 %i, 177 %cmp286.us = icmp ugt i64 %i, 078 br i1 %cmp286.us, label %outer.header, label %exit79 80exit:81 ret i16 %old.cond.lcssa82}83