From 45f48746110f5e6f7e65af7de239333dbd45d1d1 Mon Sep 17 00:00:00 2001 From: Daniel Dunbar Date: Sat, 13 Feb 2010 09:28:22 +0000 Subject: [PATCH] MC/Mach-O: Implement EmitValue using data fragments + fixups instead of fill fragment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96091 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/MC/MCMachOStreamer.cpp | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/lib/MC/MCMachOStreamer.cpp b/lib/MC/MCMachOStreamer.cpp index 99a819f7190..770105d0e51 100644 --- a/lib/MC/MCMachOStreamer.cpp +++ b/lib/MC/MCMachOStreamer.cpp @@ -333,7 +333,23 @@ void MCMachOStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) { void MCMachOStreamer::EmitValue(const MCExpr *Value, unsigned Size, unsigned AddrSpace) { - new MCFillFragment(*AddValueSymbols(Value), Size, 1, CurSectionData); + // Assume the front-end will have evaluate things absolute expressions, so + // just create data + fixup. + MCDataFragment *DF = dyn_cast_or_null(getCurrentFragment()); + if (!DF) + DF = new MCDataFragment(CurSectionData); + + // Avoid fixups when possible. + int64_t AbsValue; + if (Value->EvaluateAsAbsolute(AbsValue)) { + // FIXME: Endianness assumption. + for (unsigned i = 0; i != Size; ++i) + DF->getContents().push_back(uint8_t(AbsValue >> (i * 8))); + } else { + DF->getFixups().push_back(MCAsmFixup(DF->getContents().size(), + *AddValueSymbols(Value), Size)); + DF->getContents().resize(DF->getContents().size() + Size, 0); + } } void MCMachOStreamer::EmitValueToAlignment(unsigned ByteAlignment, -- 2.11.0