diff options
author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-01 15:14:14 +0000 |
---|---|---|
committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-01 15:14:14 +0000 |
commit | f0070f2a973ff046ee63de827ab32ff215b369b2 (patch) | |
tree | d7cca1e05d979af11340a7a19e50e01b38551bb4 | |
parent | cfb65293c36612884010144a6d93b8e98570b3a9 (diff) | |
download | external_llvm-f0070f2a973ff046ee63de827ab32ff215b369b2.zip external_llvm-f0070f2a973ff046ee63de827ab32ff215b369b2.tar.gz external_llvm-f0070f2a973ff046ee63de827ab32ff215b369b2.tar.bz2 |
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
-rw-r--r-- | include/llvm/MC/MCObjectStreamer.h | 2 | ||||
-rw-r--r-- | lib/MC/MCObjectStreamer.cpp | 8 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/llvm/MC/MCObjectStreamer.h b/include/llvm/MC/MCObjectStreamer.h index b59b76c..1869078 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 21756cd..4b9acf7 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; |