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EmitAlignment() also emits optional fill value.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40500 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-07-25 23:35:07 +00:00
parent d88ea4d9aa
commit 73a259a9d1
2 changed files with 10 additions and 4 deletions
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7
include/llvm/CodeGen/AsmPrinter.h
View File

@ -251,7 +251,9 @@ namespace llvm {
/// an explicit alignment requested, it will unconditionally override the /// an explicit alignment requested, it will unconditionally override the
/// alignment request. However, if ForcedAlignBits is specified, this value /// alignment request. However, if ForcedAlignBits is specified, this value
/// has final say: the ultimate alignment will be the max of ForcedAlignBits /// has final say: the ultimate alignment will be the max of ForcedAlignBits
/// and the alignment computed with NumBits and the global. /// and the alignment computed with NumBits and the global. If UseFillExpr
/// is true, it also emits an optional second value FillValue which the
/// assembler uses to fill gaps to match alignment.
/// ///
/// The algorithm is: /// The algorithm is:
/// Align = NumBits; /// Align = NumBits;
@ -259,7 +261,8 @@ namespace llvm {
/// Align = std::max(Align, ForcedAlignBits); /// Align = std::max(Align, ForcedAlignBits);
/// ///
void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0, void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0,
unsigned ForcedAlignBits = 0) const; unsigned ForcedAlignBits = 0, bool UseFillExpr = false,
unsigned FillValue = 0) const;
protected: protected:
/// EmitZeros - Emit a block of zeros. /// EmitZeros - Emit a block of zeros.

7
lib/CodeGen/AsmPrinter.cpp
View File

@ -621,14 +621,17 @@ void AsmPrinter::EmitString(const std::string &String) const {
// Align = std::max(Align, ForcedAlignBits); // Align = std::max(Align, ForcedAlignBits);
// //
void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV, void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
unsigned ForcedAlignBits) const { unsigned ForcedAlignBits, bool UseFillExpr,
unsigned FillValue) const {
if (GV && GV->getAlignment()) if (GV && GV->getAlignment())
NumBits = Log2_32(GV->getAlignment()); NumBits = Log2_32(GV->getAlignment());
NumBits = std::max(NumBits, ForcedAlignBits); NumBits = std::max(NumBits, ForcedAlignBits);
if (NumBits == 0) return; // No need to emit alignment. if (NumBits == 0) return; // No need to emit alignment.
if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits; if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
O << TAI->getAlignDirective() << NumBits << "\n"; O << TAI->getAlignDirective() << NumBits;
if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
O << "\n";
} }