derek.holloway
7502bf64a4
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109 lines
4.7 KiB
LLVM
109 lines
4.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -p loop-unroll -S %s | FileCheck %s
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target triple = "hexagon-unknown-linux"
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declare void @foo()
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define void @preserve_lcssa_when_reusing_existing_phi() {
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; CHECK-LABEL: define void @preserve_lcssa_when_reusing_existing_phi() {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br label %[[LOOP_1_HEADER:.*]]
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; CHECK: [[LOOP_1_HEADER]]:
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; CHECK-NEXT: br label %[[LOOP_2_HEADER:.*]]
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; CHECK: [[LOOP_2_HEADER]]:
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; CHECK-NEXT: br label %[[LOOP_3:.*]]
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; CHECK: [[LOOP_3]]:
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; CHECK-NEXT: [[IV_3:%.*]] = phi i32 [ [[IV_3_NEXT:%.*]], %[[LOOP_3]] ], [ 0, %[[LOOP_2_HEADER]] ]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: [[IV_3_NEXT]] = add i32 [[IV_3]], 1
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; CHECK-NEXT: br i1 false, label %[[PH:.*]], label %[[LOOP_3]]
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; CHECK: [[PH]]:
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; CHECK-NEXT: [[IV_3_LCSSA:%.*]] = phi i32 [ [[IV_3]], %[[LOOP_3]] ]
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; CHECK-NEXT: br i1 true, label %[[LOOP_2_LATCH:.*]], label %[[LOOP_4_PREHEADER:.*]]
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; CHECK: [[LOOP_4_PREHEADER]]:
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; CHECK-NEXT: [[IV_3_LCSSA_LCSSA1:%.*]] = phi i32 [ [[IV_3_LCSSA]], %[[PH]] ]
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; CHECK-NEXT: [[IV_3_LCSSA_LCSSA:%.*]] = phi i32 [ [[IV_3_LCSSA]], %[[PH]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[IV_3_LCSSA_LCSSA1]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = freeze i32 [[TMP0]]
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; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], -1
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; CHECK-NEXT: [[XTRAITER:%.*]] = and i32 [[TMP1]], 7
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; CHECK-NEXT: [[TMP3:%.*]] = icmp ult i32 [[TMP2]], 7
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; CHECK-NEXT: br i1 [[TMP3]], label %[[LOOP_4_EPIL_PREHEADER:.*]], label %[[LOOP_4_PREHEADER_NEW:.*]]
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; CHECK: [[LOOP_4_PREHEADER_NEW]]:
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; CHECK-NEXT: br label %[[LOOP_4:.*]]
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; CHECK: [[LOOP_2_LATCH]]:
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; CHECK-NEXT: br label %[[LOOP_2_HEADER]]
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; CHECK: [[LOOP_4]]:
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; CHECK-NEXT: [[IV_4:%.*]] = phi i32 [ 0, %[[LOOP_4_PREHEADER_NEW]] ], [ [[INC_I_7:%.*]], %[[LOOP_4]] ]
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; CHECK-NEXT: [[NITER:%.*]] = phi i32 [ 0, %[[LOOP_4_PREHEADER_NEW]] ], [ [[NITER_NEXT_7:%.*]], %[[LOOP_4]] ]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: [[INC_I_7]] = add nuw nsw i32 [[IV_4]], 8
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; CHECK-NEXT: [[NITER_NEXT_7]] = add nuw nsw i32 [[NITER]], 8
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; CHECK-NEXT: br i1 true, label %[[LOOP_1_LATCH_UNR_LCSSA:.*]], label %[[LOOP_4]]
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; CHECK: [[LOOP_1_LATCH_UNR_LCSSA]]:
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; CHECK-NEXT: [[IV_4_UNR:%.*]] = phi i32 [ [[INC_I_7]], %[[LOOP_4]] ]
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; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i32 [[XTRAITER]], 0
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; CHECK-NEXT: br i1 [[LCMP_MOD]], label %[[LOOP_4_EPIL_PREHEADER]], label %[[LOOP_1_LATCH:.*]]
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; CHECK: [[LOOP_4_EPIL_PREHEADER]]:
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; CHECK-NEXT: [[IV_4_EPIL_INIT:%.*]] = phi i32 [ 0, %[[LOOP_4_PREHEADER]] ], [ [[IV_4_UNR]], %[[LOOP_1_LATCH_UNR_LCSSA]] ]
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; CHECK-NEXT: [[LCMP_MOD2:%.*]] = icmp ne i32 [[XTRAITER]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[LCMP_MOD2]])
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; CHECK-NEXT: br label %[[LOOP_4_EPIL:.*]]
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; CHECK: [[LOOP_4_EPIL]]:
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; CHECK-NEXT: [[IV_4_EPIL:%.*]] = phi i32 [ [[INC_I_EPIL:%.*]], %[[LOOP_4_EPIL]] ], [ [[IV_4_EPIL_INIT]], %[[LOOP_4_EPIL_PREHEADER]] ]
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; CHECK-NEXT: [[EPIL_ITER:%.*]] = phi i32 [ 0, %[[LOOP_4_EPIL_PREHEADER]] ], [ [[EPIL_ITER_NEXT:%.*]], %[[LOOP_4_EPIL]] ]
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: [[INC_I_EPIL]] = add i32 [[IV_4_EPIL]], 1
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; CHECK-NEXT: [[EC_EPIL:%.*]] = icmp eq i32 [[IV_4_EPIL]], [[IV_3_LCSSA_LCSSA]]
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; CHECK-NEXT: [[EPIL_ITER_NEXT]] = add i32 [[EPIL_ITER]], 1
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; CHECK-NEXT: [[EPIL_ITER_CMP:%.*]] = icmp ne i32 [[EPIL_ITER_NEXT]], [[XTRAITER]]
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; CHECK-NEXT: br i1 [[EPIL_ITER_CMP]], label %[[LOOP_4_EPIL]], label %[[LOOP_1_LATCH_EPILOG_LCSSA:.*]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: [[LOOP_1_LATCH_EPILOG_LCSSA]]:
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; CHECK-NEXT: br label %[[LOOP_1_LATCH]]
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; CHECK: [[LOOP_1_LATCH]]:
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; CHECK-NEXT: br label %[[LOOP_1_HEADER]]
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;
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entry:
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br label %loop.1.header
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loop.1.header:
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br label %loop.2.header
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loop.2.header:
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br label %loop.3
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loop.3:
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%iv.3 = phi i32 [ %iv.3.next, %loop.3 ], [ 0, %loop.2.header ]
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call void @foo()
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%iv.3.next = add i32 %iv.3, 1
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br i1 false, label %ph, label %loop.3
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ph:
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br i1 true, label %loop.2.latch, label %loop.4
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loop.2.latch:
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br label %loop.2.header
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loop.4:
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%iv.4 = phi i32 [ 0, %ph ], [ %inc.i, %loop.4 ]
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call void @foo()
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%inc.i = add i32 %iv.4, 1
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%ec = icmp eq i32 %iv.4, %iv.3
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br i1 %ec, label %loop.1.latch, label %loop.4
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loop.1.latch:
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br label %loop.1.header
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}
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;.
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; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]]}
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; CHECK: [[META1]] = !{!"llvm.loop.unroll.disable"}
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;.
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