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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=gvn -enable-split-backedge-in-load-pre -S %s | FileCheck %s3 4; Test case for PR31651.5 6target datalayout = "p:16:16"7 8declare void @use(i16) readonly9 10define i16 @test_PR31651(ptr %ub.16) {11; CHECK-LABEL: @test_PR31651(12; CHECK-NEXT: br label [[LOOP_1_HEADER:%.*]]13; CHECK: loop.1.header:14; CHECK-NEXT: [[IV_1:%.*]] = phi i16 [ 0, [[TMP0:%.*]] ], [ [[IV_1_NEXT:%.*]], [[LOOP_1_LATCH:%.*]] ]15; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i16 [[IV_1]], 016; CHECK-NEXT: br i1 [[CMP_1]], label [[CONT_1:%.*]], label [[THEN_1:%.*]]17; CHECK: then.1:18; CHECK-NEXT: [[_TMP18:%.*]] = add i16 [[IV_1]], -119; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr [4 x i16], ptr [[UB_16:%.*]], i16 1, i16 [[_TMP18]]20; CHECK-NEXT: [[L_1:%.*]] = load i16, ptr [[GEP_1]], align 221; CHECK-NEXT: br label [[CONT_1]]22; CHECK: cont.1:23; CHECK-NEXT: [[IV_1_SINK:%.*]] = phi i16 [ [[IV_1]], [[THEN_1]] ], [ 0, [[LOOP_1_HEADER]] ]24; CHECK-NEXT: [[SINK:%.*]] = phi i16 [ [[L_1]], [[THEN_1]] ], [ 10, [[LOOP_1_HEADER]] ]25; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr [4 x i16], ptr [[UB_16]], i16 1, i16 [[IV_1_SINK]]26; CHECK-NEXT: br i1 [[CMP_1]], label [[THEN_2:%.*]], label [[ELSE_2:%.*]]27; CHECK: then.2:28; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr [4 x i16], ptr [[UB_16]], i16 1, i16 029; CHECK-NEXT: [[L_2:%.*]] = load i16, ptr [[GEP_3]], align 230; CHECK-NEXT: call void @use(i16 [[L_2]])31; CHECK-NEXT: br label [[LOOP_1_LATCH]]32; CHECK: else.2:33; CHECK-NEXT: [[GEP_4:%.*]] = getelementptr [4 x i16], ptr [[UB_16]], i16 1, i16 [[IV_1]]34; CHECK-NEXT: [[L_3:%.*]] = load i16, ptr [[GEP_4]], align 235; CHECK-NEXT: call void @use(i16 [[L_3]])36; CHECK-NEXT: br label [[LOOP_1_LATCH]]37; CHECK: loop.1.latch:38; CHECK-NEXT: [[IV_1_NEXT]] = add i16 [[IV_1]], 139; CHECK-NEXT: [[CMP_3:%.*]] = icmp slt i16 [[IV_1_NEXT]], 240; CHECK-NEXT: br i1 [[CMP_3]], label [[LOOP_1_HEADER]], label [[LOOP_2:%.*]]41; CHECK: loop.2:42; CHECK-NEXT: [[IV_2:%.*]] = phi i16 [ 0, [[LOOP_1_LATCH]] ], [ [[IV_2_NEXT:%.*]], [[LOOP_2]] ]43; CHECK-NEXT: [[SUM:%.*]] = phi i16 [ 0, [[LOOP_1_LATCH]] ], [ [[SUM_NEXT:%.*]], [[LOOP_2]] ]44; CHECK-NEXT: [[GEP_5:%.*]] = getelementptr [4 x i16], ptr [[UB_16]], i16 1, i16 [[IV_2]]45; CHECK-NEXT: [[L_4:%.*]] = load i16, ptr [[GEP_5]], align 246; CHECK-NEXT: [[SUM_NEXT]] = add i16 [[SUM]], [[L_4]]47; CHECK-NEXT: [[IV_2_NEXT]] = add i16 [[IV_2]], 148; CHECK-NEXT: [[CMP_4:%.*]] = icmp slt i16 [[IV_2_NEXT]], 249; CHECK-NEXT: br i1 [[CMP_4]], label [[LOOP_2]], label [[EXIT:%.*]]50; CHECK: exit:51; CHECK-NEXT: ret i16 [[SUM_NEXT]]52;53 br label %loop.1.header54 55loop.1.header:56 %iv.1 = phi i16 [ 0, %0 ], [ %iv.1.next, %loop.1.latch ]57 %cmp.1 = icmp eq i16 %iv.1, 058 br i1 %cmp.1 , label %cont.1, label %then.159 60then.1:61 %_tmp18 = add i16 %iv.1, -162 %gep.1 = getelementptr [4 x i16], ptr %ub.16, i16 1, i16 %_tmp1863 %l.1 = load i16, ptr %gep.1, align 264 br label %cont.165 66cont.1:67 %iv.1.sink = phi i16 [ %iv.1, %then.1 ], [ 0, %loop.1.header ]68 %sink = phi i16 [ %l.1, %then.1 ], [ 10, %loop.1.header ]69 %gep.2 = getelementptr [4 x i16], ptr %ub.16, i16 1, i16 %iv.1.sink70 %cmp.2 = icmp eq i16 %iv.1, 071 br i1 %cmp.2, label %then.2, label %else.272 73then.2:74 %gep.3 = getelementptr [4 x i16], ptr %ub.16, i16 1, i16 %iv.175 %l.2 = load i16, ptr %gep.3, align 276 call void @use(i16 %l.2)77 br label %loop.1.latch78 79else.2:80 %gep.4 = getelementptr [4 x i16], ptr %ub.16, i16 1, i16 %iv.181 %l.3 = load i16, ptr %gep.4, align 282 call void @use(i16 %l.3)83 br label %loop.1.latch84 85loop.1.latch:86 %iv.1.next = add i16 %iv.1, 187 %cmp.3 = icmp slt i16 %iv.1.next, 288 br i1 %cmp.3, label %loop.1.header, label %loop.289 90loop.2:91 %iv.2 = phi i16 [ 0, %loop.1.latch ], [ %iv.2.next, %loop.2 ]92 %sum = phi i16 [ 0, %loop.1.latch ], [ %sum.next, %loop.2 ]93 %gep.5 = getelementptr [4 x i16], ptr %ub.16, i16 1, i16 %iv.294 %l.4 = load i16, ptr %gep.5, align 295 %sum.next = add i16 %sum, %l.496 %iv.2.next = add i16 %iv.2, 197 %cmp.4 = icmp slt i16 %iv.2.next, 298 br i1 %cmp.4, label %loop.2, label %exit99 100exit:101 ret i16 %sum.next102 103 uselistorder ptr %ub.16, { 4, 3, 2, 0, 1 }104}105