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switch asmprinter to emit alignments through OutStreamer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79406 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -753,15 +753,12 @@ void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
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NumBits = std::max(NumBits, ForcedAlignBits);
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if (NumBits == 0) return; // No need to emit alignment.
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if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
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O << TAI->getAlignDirective() << NumBits;
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unsigned FillValue = 0;
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if (getCurrentSection()->getKind().isText())
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if (unsigned FillValue = TAI->getTextAlignFillValue()) {
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O << ',';
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PrintHex(FillValue);
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}
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O << '\n';
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FillValue = TAI->getTextAlignFillValue();
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OutStreamer.EmitValueToAlignment(1 << NumBits, FillValue, 1, 0);
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}
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/// EmitZeros - Emit a block of zeros.
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@ -14,7 +14,9 @@
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Target/TargetAsmInfo.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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@ -224,24 +226,37 @@ void MCAsmStreamer::EmitValue(const MCValue &Value, unsigned Size) {
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void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
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unsigned ValueSize,
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unsigned MaxBytesToEmit) {
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// Some assemblers don't support .balign, so we always emit as .p2align if
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// this is a power of two. Otherwise we assume the client knows the target
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// supports .balign and use that.
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unsigned Pow2 = Log2_32(ByteAlignment);
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bool IsPow2 = (1U << Pow2) == ByteAlignment;
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// Some assemblers don't support non-power of two alignments, so we always
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// emit alignments as a power of two if possible.
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if (isPowerOf2_32(ByteAlignment)) {
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OS << TAI.getAlignDirective();
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switch (ValueSize) {
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default:
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llvm_unreachable("Invalid size for machine code value!");
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case 8:
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llvm_unreachable("Unsupported alignment size!");
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case 1: OS << (IsPow2 ? ".p2align" : ".balign"); break;
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case 2: OS << (IsPow2 ? ".p2alignw" : ".balignw"); break;
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case 4: OS << (IsPow2 ? ".p2alignl" : ".balignl"); break;
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if (TAI.getAlignmentIsInBytes())
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OS << ByteAlignment;
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else
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OS << Log2_32(ByteAlignment);
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if (Value || MaxBytesToEmit) {
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OS << ", " << truncateToSize(Value, ValueSize);
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if (MaxBytesToEmit)
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OS << ", " << MaxBytesToEmit;
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}
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OS << '\n';
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return;
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}
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OS << ' ' << (IsPow2 ? Pow2 : ByteAlignment);
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// Non-power of two alignment. This is not widely supported by assemblers.
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// FIXME: Parameterize this based on TAI.
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switch (ValueSize) {
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default: llvm_unreachable("Invalid size for machine code value!");
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case 1: OS << ".balign"; break;
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case 2: OS << ".balignw"; break;
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case 4: OS << ".balignl"; break;
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case 8: llvm_unreachable("Unsupported alignment size!");
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}
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OS << ' ' << ByteAlignment;
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OS << ", " << truncateToSize(Value, ValueSize);
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if (MaxBytesToEmit)
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OS << ", " << MaxBytesToEmit;
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