Merging r198744:

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r198744 | iain | 2014-01-08 05:22:54 -0500 (Wed, 08 Jan 2014) | 8 lines

[patch] Adjust behavior of FDE cross-section relocs for targets that don't support abs-differences.

Modern versions of OSX/Darwin's ld (ld64 > 97.17) have an optimisation present that allows the back end to omit relocations (and replace them with an absolute difference) for FDE some text section refs.

This patch allows a backend to opt-in to this behaviour by setting "DwarfFDESymbolsUseAbsDiff".  At present, this is only enabled for modern x86 OSX ports.

test changes by David Fang.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@205768 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/MC/MCAsmInfo.cpp b/lib/MC/MCAsmInfo.cpp
index 5882e696b7..d38f182fad 100644
--- a/lib/MC/MCAsmInfo.cpp
+++ b/lib/MC/MCAsmInfo.cpp
@@ -85,6 +85,7 @@ MCAsmInfo::MCAsmInfo() {
   SupportsDebugInformation = false;
   ExceptionsType = ExceptionHandling::None;
   DwarfUsesRelocationsAcrossSections = true;
+  DwarfFDESymbolsUseAbsDiff = false;
   DwarfRegNumForCFI = false;
   HasMicrosoftFastStdCallMangling = false;
   NeedsDwarfSectionOffsetDirective = false;