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Remove incredibly confusing isBaseAddressKnownZero.

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When referring to a symbol in a dwarf section on ELF we should use

.long foo

instead of

.long foo - .debug_something

because ELF is unaware of the content of the sections and therefore needs
relocations. This has nothing to do with optimizing a -0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-03-10 04:11:52 +00:00
parent 44292e80ac
commit 774ad7aeb3
4 changed files with 2 additions and 18 deletions
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5
lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
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@@ -179,9 +179,8 @@ void AsmPrinter::EmitSectionOffset(const MCSymbol *Label,
assert((!Label->isInSection() || &Label->getSection() == &Section) &&
"Section offset using wrong section base for label");
// If the section in question will end up with an address of 0 anyway, we can
// just emit an absolute reference to save a relocation.
if (Section.isBaseAddressKnownZero()) {
// If the format uses relocations with dwarf, refer to the symbol directly.
if (MAI->doesDwarfUseRelocationsAcrossSections()) {
OutStreamer.EmitSymbolValue(Label, 4);
return;
}