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| author | Tom Stellard <thomas.stellard@amd.com> | 2014-04-08 14:28:03 +0000 |
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| committer | Tom Stellard <thomas.stellard@amd.com> | 2014-04-08 14:28:03 +0000 |
| commit | 89bdc4dd5541a9eee0b83e81e0bc0c924abc7d30 (patch) | |
| tree | 6788d36dcd5680846ea050ef9302bb9f6d089915 /lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp | |
| parent | 16fbfb406f11a05ff2a745639a60237fb071b1a6 (diff) | |
| download | llvm-89bdc4dd5541a9eee0b83e81e0bc0c924abc7d30.tar.gz llvm-89bdc4dd5541a9eee0b83e81e0bc0c924abc7d30.tar.bz2 llvm-89bdc4dd5541a9eee0b83e81e0bc0c924abc7d30.tar.xz | |
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
Diffstat (limited to 'lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp')
| -rw-r--r-- | lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp b/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp index 3861e1ce29..6a173fd309 100644 --- a/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp +++ b/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp @@ -65,6 +65,11 @@ X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &T) { // Exceptions handling ExceptionsType = ExceptionHandling::DwarfCFI; + + // FIXME: this should not depend on the target OS version, but on the ld64 + // version in use. From at least >= ld64-97.17 (Xcode 3.2.6) the abs-ified + // FDE relocs may be used. + DwarfFDESymbolsUseAbsDiff = T.isMacOSX() && !T.isMacOSXVersionLT(10, 6); } X86_64MCAsmInfoDarwin::X86_64MCAsmInfoDarwin(const Triple &Triple) |