derek.holloway
7502bf64a4
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51 lines
2.0 KiB
LLVM
51 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals all --version 6
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; RUN: opt -passes=loop-idiom -S %s | FileCheck %s
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target datalayout = "p:16:16"
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;.
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; CHECK: @.crctable = private constant [256 x i32] zeroinitializer
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;.
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define void @test_with_dl() {
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; CHECK-LABEL: define void @test_with_dl() {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: br label %[[PH:.*]]
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; CHECK: [[PH_LOOPEXIT:.*]]:
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; CHECK-NEXT: [[CRC_NEXT_LCSSA:%.*]] = phi i32 [ [[CRC_NEXT3:%.*]], %[[LOOP:.*]] ]
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; CHECK-NEXT: br label %[[PH]]
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; CHECK: [[PH]]:
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; CHECK-NEXT: [[CRC_USE:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[CRC_NEXT_LCSSA]], %[[PH_LOOPEXIT]] ]
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; CHECK-NEXT: br label %[[LOOP]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i16 [ 0, %[[PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[CRC2:%.*]] = phi i32 [ 0, %[[PH]] ], [ [[CRC_NEXT3]], %[[LOOP]] ]
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; CHECK-NEXT: [[INDEXER_LO:%.*]] = trunc i32 [[CRC2]] to i8
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; CHECK-NEXT: [[INDEXER_EXT:%.*]] = zext i8 [[INDEXER_LO]] to i16
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; CHECK-NEXT: [[TBL_PTRADD:%.*]] = getelementptr inbounds i32, ptr @.crctable, i16 [[INDEXER_EXT]]
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; CHECK-NEXT: [[TBL_LD:%.*]] = load i32, ptr [[TBL_PTRADD]], align 4
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; CHECK-NEXT: [[CRC_LE_SHIFT:%.*]] = lshr i32 [[CRC2]], 8
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; CHECK-NEXT: [[CRC_NEXT3]] = xor i32 [[CRC_LE_SHIFT]], [[TBL_LD]]
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; CHECK-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
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; CHECK-NEXT: [[EXIT_COND1:%.*]] = icmp ne i16 [[IV]], 0
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; CHECK-NEXT: br i1 [[EXIT_COND1]], label %[[LOOP]], label %[[PH_LOOPEXIT]]
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;
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entry:
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br label %ph
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ph:
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%crc.use = phi i32 [ 0, %entry ], [ %crc.next, %loop ]
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br label %loop
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loop:
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%iv = phi i16 [ 0, %ph ], [ %iv.next, %loop ]
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%crc = phi i32 [ 0, %ph ], [ %crc.next, %loop ]
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%lshr.crc.1 = lshr i32 %crc, 1
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%crc.and.1 = and i32 %crc, 1
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%sb.check = icmp eq i32 %crc.and.1, 0
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%xor = xor i32 %lshr.crc.1, 0
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%crc.next = select i1 %sb.check, i32 %lshr.crc.1, i32 %xor
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%iv.next = add i16 %iv, 1
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%exit.cond = icmp ult i16 %iv, 7
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br i1 %exit.cond, label %loop, label %ph
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}
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