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Simplify a really complicated check for Arch == X86_64.

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The function hasReliableSymbolDifference had exactly one use in the MachO
writer. It is also only true for X86_64. In fact, the comments refers to
"Darwin x86_64" and everything else, so this makes the code match the
comment.

If this is to be abstracted again, it should be a property of
TargetObjectWriter, like useAggressiveSymbolFolding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203605 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-03-11 21:22:57 +00:00
parent 819af77aa3
commit d1742f6136
6 changed files with 8 additions and 21 deletions
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15
include/llvm/MC/MCAsmBackend.h
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@@ -38,7 +38,6 @@ class MCAsmBackend {
protected: // Can only create subclasses.
MCAsmBackend();
unsigned HasReliableSymbolDifference : 1;
unsigned HasDataInCodeSupport : 1;
public:
@@ -58,20 +57,6 @@ public:
"backend");
}
/// hasReliableSymbolDifference - Check whether this target implements
/// accurate relocations for differences between symbols. If not, differences
/// between symbols will always be relocatable expressions and any references
/// to temporary symbols will be assumed to be in the same atom, unless they
/// reside in a different section.
///
/// This should always be true (since it results in fewer relocations with no
/// loss of functionality), but is currently supported as a way to maintain
/// exact object compatibility with Darwin 'as' (on non-x86_64). It should
/// eventually should be eliminated.
bool hasReliableSymbolDifference() const {
return HasReliableSymbolDifference;
}
/// hasDataInCodeSupport - Check whether this target implements data-in-code
/// markers. If not, data region directives will be ignored.
bool hasDataInCodeSupport() const { return HasDataInCodeSupport; }