[PATCH][ARM] Add support for krait cpu in llvm::sys::getHostCPUName()

[Kai Nacke]

Hi,

recently support for krait cpu was added.
This patch extends llvm::sys::getHostCPUName() to return krait as cpu 
for the APQ0864.

Please review.

Regards,
Kai
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diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index c5f9c87..b6e2cb1 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -620,6 +620,17 @@ StringRef sys::getHostCPUName() {
           .Case("0xc24", "cortex-m4")
           .Default("generic");
 
+  if (Implementer == "0x51") // Qualcomm Technologies, Inc.
+    // Look for the CPU part line.
+    for (unsigned I = 0, E = Lines.size(); I != E; ++I)
+      if (Lines[I].startswith("CPU part"))
+        // The CPU part is a 3 digit hexadecimal number with a 0x prefix. The
+        // values correspond to the "Part number" in the CP15/c0 register. The
+        // contents are specified in the various processor manuals.
+        return StringSwitch<const char *>(Lines[I].substr(8).ltrim("\t :"))
+          .Case("0x06f", "krait") // APQ8064
+          .Default("generic");
+
   return "generic";
 }
 #elif defined(__linux__) && defined(__s390x__)