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39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
Index: llvm-toolchain-3.3-3.3/clang/lib/Basic/Targets.cpp
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===================================================================
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--- llvm-toolchain-3.3-3.3.orig/clang/lib/Basic/Targets.cpp 2013-10-09 15:36:51.000000000 +0200
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+++ llvm-toolchain-3.3-3.3/clang/lib/Basic/Targets.cpp 2013-10-09 17:04:58.000000000 +0200
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@@ -3579,33 +3579,6 @@
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return Version >= 7;
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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 std::string &TripleStr)
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