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1 //===- ValueTracking.cpp - Walk computations to compute properties --------===// | 1 //===- ValueTracking.cpp - Walk computations to compute properties --------===// |
2 // | 2 // |
3 // The LLVM Compiler Infrastructure | 3 // The LLVM Compiler Infrastructure |
4 // | 4 // |
5 // This file is distributed under the University of Illinois Open Source | 5 // This file is distributed under the University of Illinois Open Source |
6 // License. See LICENSE.TXT for details. | 6 // License. See LICENSE.TXT for details. |
7 // | 7 // |
8 //===----------------------------------------------------------------------===// | 8 //===----------------------------------------------------------------------===// |
9 // | 9 // |
10 // This file contains routines that help analyze properties that chains of | 10 // This file contains routines that help analyze properties that chains of |
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673 if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(I)) { | 673 if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(I)) { |
674 switch (II->getIntrinsicID()) { | 674 switch (II->getIntrinsicID()) { |
675 default: break; | 675 default: break; |
676 case Intrinsic::ctpop: | 676 case Intrinsic::ctpop: |
677 case Intrinsic::ctlz: | 677 case Intrinsic::ctlz: |
678 case Intrinsic::cttz: { | 678 case Intrinsic::cttz: { |
679 unsigned LowBits = Log2_32(BitWidth)+1; | 679 unsigned LowBits = Log2_32(BitWidth)+1; |
680 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); | 680 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); |
681 break; | 681 break; |
682 } | 682 } |
| 683 #if defined(TARGET_ENABLED_X86) |
683 case Intrinsic::x86_sse42_crc32_64_8: | 684 case Intrinsic::x86_sse42_crc32_64_8: |
684 case Intrinsic::x86_sse42_crc32_64_64: | 685 case Intrinsic::x86_sse42_crc32_64_64: |
685 KnownZero = APInt::getHighBitsSet(64, 32); | 686 KnownZero = APInt::getHighBitsSet(64, 32); |
686 break; | 687 break; |
| 688 #endif // TARGET_ENABLED_X86 |
687 } | 689 } |
688 } | 690 } |
689 break; | 691 break; |
690 } | 692 } |
691 } | 693 } |
692 | 694 |
693 /// ComputeSignBit - Determine whether the sign bit is known to be zero or | 695 /// ComputeSignBit - Determine whether the sign bit is known to be zero or |
694 /// one. Convenience wrapper around ComputeMaskedBits. | 696 /// one. Convenience wrapper around ComputeMaskedBits. |
695 void llvm::ComputeSignBit(Value *V, bool &KnownZero, bool &KnownOne, | 697 void llvm::ComputeSignBit(Value *V, bool &KnownZero, bool &KnownOne, |
696 const TargetData *TD, unsigned Depth) { | 698 const TargetData *TD, unsigned Depth) { |
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1786 UI != UE; ++UI) { | 1788 UI != UE; ++UI) { |
1787 const IntrinsicInst *II = dyn_cast<IntrinsicInst>(*UI); | 1789 const IntrinsicInst *II = dyn_cast<IntrinsicInst>(*UI); |
1788 if (!II) return false; | 1790 if (!II) return false; |
1789 | 1791 |
1790 if (II->getIntrinsicID() != Intrinsic::lifetime_start && | 1792 if (II->getIntrinsicID() != Intrinsic::lifetime_start && |
1791 II->getIntrinsicID() != Intrinsic::lifetime_end) | 1793 II->getIntrinsicID() != Intrinsic::lifetime_end) |
1792 return false; | 1794 return false; |
1793 } | 1795 } |
1794 return true; | 1796 return true; |
1795 } | 1797 } |
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