[llvm-commits] [llvm] r164945 - in /llvm/trunk: include/llvm/MC/MCObjectStreamer.h lib/MC/MCObjectStreamer.cpp
Benjamin Kramer
benny.kra at googlemail.com
Mon Oct 1 08:14:15 PDT 2012
Author: d0k
Date: Mon Oct 1 10:14:14 2012
New Revision: 164945
URL: http://llvm.org/viewvc/llvm-project?rev=164945&view=rev
Log:
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.
Modified:
llvm/trunk/include/llvm/MC/MCObjectStreamer.h
llvm/trunk/lib/MC/MCObjectStreamer.cpp
Modified: llvm/trunk/include/llvm/MC/MCObjectStreamer.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCObjectStreamer.h?rev=164945&r1=164944&r2=164945&view=diff
==============================================================================
--- llvm/trunk/include/llvm/MC/MCObjectStreamer.h (original)
+++ llvm/trunk/include/llvm/MC/MCObjectStreamer.h Mon Oct 1 10:14:14 2012
@@ -81,6 +81,8 @@
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();
/// @}
Modified: llvm/trunk/lib/MC/MCObjectStreamer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCObjectStreamer.cpp?rev=164945&r1=164944&r2=164945&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCObjectStreamer.cpp (original)
+++ llvm/trunk/lib/MC/MCObjectStreamer.cpp Mon Oct 1 10:14:14 2012
@@ -270,6 +270,14 @@
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;
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