From f0070f2a973ff046ee63de827ab32ff215b369b2 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Mon, 1 Oct 2012 15:14:14 +0000 Subject: [PATCH] Provide a shortcut for MCObjectStreamer when emitting fills. Reduces runtime of i386-large-relocations.s by 10x in Release builds, even more in Debug+Asserts builds. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164945 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/MC/MCObjectStreamer.h | 2 ++ lib/MC/MCObjectStreamer.cpp | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/include/llvm/MC/MCObjectStreamer.h b/include/llvm/MC/MCObjectStreamer.h index b59b76c2be8..18690786113 100644 --- a/include/llvm/MC/MCObjectStreamer.h +++ b/include/llvm/MC/MCObjectStreamer.h @@ -81,6 +81,8 @@ public: const MCSymbol *Label); virtual void EmitGPRel32Value(const MCExpr *Value); virtual void EmitGPRel64Value(const MCExpr *Value); + virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue, + unsigned AddrSpace); virtual void FinishImpl(); /// @} diff --git a/lib/MC/MCObjectStreamer.cpp b/lib/MC/MCObjectStreamer.cpp index 21756cd149b..4b9acf750d5 100644 --- a/lib/MC/MCObjectStreamer.cpp +++ b/lib/MC/MCObjectStreamer.cpp @@ -270,6 +270,14 @@ void MCObjectStreamer::EmitGPRel64Value(const MCExpr *Value) { DF->getContents().resize(DF->getContents().size() + 8, 0); } +void MCObjectStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, + unsigned AddrSpace) { + assert(AddrSpace == 0 && "Address space must be 0!"); + // FIXME: A MCFillFragment would be more memory efficient but MCExpr has + // problems evaluating expressions across multiple fragments. + getOrCreateDataFragment()->getContents().append(NumBytes, FillValue); +} + void MCObjectStreamer::FinishImpl() { // Dump out the dwarf file & directory tables and line tables. const MCSymbol *LineSectionSymbol = NULL;