Simplify ARMTargetParser::getArchSynonym

Summary:
1) The only caller, ARMTargetParser::parseArch, uses the results for an "endswith" test; so, including the "arm" prefix into the result is unnecessary.
2) Most ARMTargetParser::parseArch callers pass it the output from ARMTargetParser::getCanonicalArchName; so, make this behaviour the default. Then, including the "arm" prefix into the cases is unnecessary.

Reviewers: rengolin

Reviewed By: rengolin

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10249

llvm-svn: 239099

2 files changed, 10 insertions, 12 deletions

diff --git a/llvm/lib/Support/TargetParser.cpp b/llvm/lib/Support/TargetParser.cpp
index 372f8582da9..e09350e80e1 100644
--- a/llvm/lib/Support/TargetParser.cpp
+++ b/llvm/lib/Support/TargetParser.cpp
@@ -293,16 +293,14 @@ StringRef ARMTargetParser::getFPUSynonym(StringRef FPU) {
 
 StringRef ARMTargetParser::getArchSynonym(StringRef Arch) {
   return StringSwitch<StringRef>(Arch)
-    .Cases("armv6sm",  "v6sm",  "armv6s-m")
-    .Cases("armv6m",   "v6m",   "armv6-m")
-    .Cases("armv7a",   "v7a",   "armv7-a")
-    .Cases("armv7r",   "v7r",   "armv7-r")
-    .Cases("armv7m",   "v7m",   "armv7-m")
-    .Cases("armv7em",  "v7em",  "armv7e-m")
-    .Cases("armv8",    "v8",    "armv8-a")
-    .Cases("armv8a",   "v8a",   "armv8-a")
-    .Cases("armv8.1a", "v8.1a", "armv8.1-a")
-    .Cases("aarch64",  "arm64", "armv8-a")
+    .Case("v6sm", "v6s-m")
+    .Case("v6m", "v6-m")
+    .Case("v7a", "v7-a")
+    .Case("v7r", "v7-r")
+    .Case("v7m", "v7-m")
+    .Case("v7em", "v7e-m")
+    .Cases("v8", "v8a", "aarch64", "arm64", "armv8-a")
+    .Case("v8.1a", "v8.1-a")
     .Default(Arch);
 }
 
@@ -370,6 +368,7 @@ unsigned ARMTargetParser::parseFPU(StringRef FPU) {
 
 // Allows partial match, ex. "v7a" matches "armv7a".
 unsigned ARMTargetParser::parseArch(StringRef Arch) {
+  Arch = getCanonicalArchName(Arch);
   StringRef Syn = getArchSynonym(Arch);
   for (const auto A : ARCHNames) {
     if (StringRef(A.Name).endswith(Syn))
diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index e8163c0e02e..9312f4ceec5 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -1147,12 +1147,12 @@ Triple Triple::get64BitArchVariant() const {
 const char *Triple::getARMCPUForArch(StringRef MArch) const {
   if (MArch.empty())
     MArch = getArchName();
+  MArch = ARMTargetParser::getCanonicalArchName(MArch);
 
   // Some defaults are forced.
   switch (getOS()) {
   case llvm::Triple::FreeBSD:
   case llvm::Triple::NetBSD:
-    MArch = ARMTargetParser::getCanonicalArchName(MArch);
     if (!MArch.empty() && MArch == "v6")
       return "arm1176jzf-s";
     break;
@@ -1163,7 +1163,6 @@ const char *Triple::getARMCPUForArch(StringRef MArch) const {
     break;
   }
 
-  MArch = ARMTargetParser::getCanonicalArchName(MArch);
   if (MArch.empty())
     return nullptr;