Use atomic instructions on linux thumb v7.
This matches gcc's behaviour. The patch also explicitly parses the version so
that this keeps working when we add support for v8.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181750 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 841ca62..a622a11 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3536,9 +3536,23 @@
if (T.getOS() != llvm::Triple::Linux)
return false;
StringRef ArchName = T.getArchName();
- if (ArchName.startswith("armv6") || ArchName.startswith("armv7"))
- return true;
- return false;
+ if (T.getArch() == llvm::Triple::arm) {
+ if (!ArchName.startswith("armv"))
+ return false;
+ StringRef VersionStr = ArchName.substr(4);
+ unsigned Version;
+ if (VersionStr.getAsInteger(10, Version))
+ return false;
+ return Version >= 6;
+ }
+ assert(T.getArch() == llvm::Triple::thumb);
+ if (!ArchName.startswith("thumbv"))
+ return false;
+ StringRef VersionStr = ArchName.substr(6);
+ unsigned Version;
+ if (VersionStr.getAsInteger(10, Version))
+ return false;
+ return Version >= 7;
}
public: