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39 lines
1.6 KiB
Diff
39 lines
1.6 KiB
Diff
Index: llvm-toolchain-snapshot_3.5~svn199197/clang/lib/Basic/Targets.cpp
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===================================================================
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--- llvm-toolchain-snapshot_3.5~svn199197.orig/clang/lib/Basic/Targets.cpp 2014-01-14 11:31:20.680868086 +0100
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+++ llvm-toolchain-snapshot_3.5~svn199197/clang/lib/Basic/Targets.cpp 2014-01-14 11:31:20.676868086 +0100
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@@ -3747,33 +3747,6 @@
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// FIXME: Override "preferred align" for double and long long.
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}
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- static bool shouldUseInlineAtomic(const llvm::Triple &T) {
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- // On linux, binaries targeting old cpus call functions in libgcc to
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- // perform atomic operations. The implementation in libgcc then calls into
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- // the kernel which on armv6 and newer uses ldrex and strex. The net result
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- // is that if we assume the kernel is at least as recent as the hardware,
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- // it is safe to use atomic instructions on armv6 and newer.
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- if (T.getOS() != llvm::Triple::Linux)
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- return false;
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- StringRef ArchName = T.getArchName();
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- if (T.getArch() == llvm::Triple::arm) {
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- if (!ArchName.startswith("armv"))
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- return false;
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- StringRef VersionStr = ArchName.substr(4);
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- unsigned Version;
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- if (VersionStr.getAsInteger(10, Version))
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- return false;
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- return Version >= 6;
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- }
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- assert(T.getArch() == llvm::Triple::thumb);
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- if (!ArchName.startswith("thumbv"))
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- return false;
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- StringRef VersionStr = ArchName.substr(6);
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- unsigned Version;
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- if (VersionStr.getAsInteger(10, Version))
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- return false;
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- return Version >= 7;
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- }
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public:
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ARMTargetInfo(const llvm::Triple &Triple)
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