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Move MaximumAlignment to be a member of the Value class.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109891 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-07-30 21:07:05 +00:00
parent 81881bcd35
commit e16829b401
3 changed files with 7 additions and 6 deletions
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8
include/llvm/Value.h
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@ -307,6 +307,10 @@ public:
return const_cast<Value*>(this)->DoPHITranslation(CurBB, PredBB); return const_cast<Value*>(this)->DoPHITranslation(CurBB, PredBB);
} }
/// MaximumAlignment - This is the greatest alignment value supported by
/// load, store, and alloca instructions, and global values.
static const unsigned MaximumAlignment = 1u << 29;
protected: protected:
unsigned short getSubclassDataFromValue() const { return SubclassData; } unsigned short getSubclassDataFromValue() const { return SubclassData; }
void setValueSubclassData(unsigned short D) { SubclassData = D; } void setValueSubclassData(unsigned short D) { SubclassData = D; }
@ -401,10 +405,6 @@ public:
enum { NumLowBitsAvailable = 2 }; enum { NumLowBitsAvailable = 2 };
}; };
/// MaximumAlignment - This is the greatest alignment value supported by
/// load, store, and alloca instructions, and global values.
static const unsigned MaximumAlignment = 1u << 29;
} // End llvm namespace } // End llvm namespace
#endif #endif

2
lib/AsmParser/LLParser.cpp
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@ -1154,7 +1154,7 @@ bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
if (ParseUInt32(Alignment)) return true; if (ParseUInt32(Alignment)) return true;
if (!isPowerOf2_32(Alignment)) if (!isPowerOf2_32(Alignment))
return Error(AlignLoc, "alignment is not a power of two"); return Error(AlignLoc, "alignment is not a power of two");
if (Alignment > MaximumAlignment) if (Alignment > Value::MaximumAlignment)
return Error(AlignLoc, "huge alignments are not supported yet"); return Error(AlignLoc, "huge alignments are not supported yet");
return false; return false;
} }

3
lib/Transforms/InstCombine/InstCombineCalls.cpp
View File

@ -109,9 +109,10 @@ unsigned InstCombiner::GetOrEnforceKnownAlignment(Value *V,
TrailZ = std::min(TrailZ, unsigned(sizeof(unsigned) * CHAR_BIT - 1)); TrailZ = std::min(TrailZ, unsigned(sizeof(unsigned) * CHAR_BIT - 1));
unsigned Align = 1u << std::min(BitWidth - 1, TrailZ); unsigned Align = 1u << std::min(BitWidth - 1, TrailZ);
unsigned MaxAlign = Value::MaximumAlignment;
// LLVM doesn't support alignments larger than this currently. // LLVM doesn't support alignments larger than this currently.
Align = std::min(Align, MaximumAlignment); Align = std::min(Align, MaxAlign);
if (PrefAlign > Align) if (PrefAlign > Align)
Align = EnforceKnownAlignment(V, Align, PrefAlign); Align = EnforceKnownAlignment(V, Align, PrefAlign);