Removed redundant global.params.cpu field.

Now that we have global.params.targetTriple, the information
is only duplicated.

dmd2/mars.h

@@ -147,17 +147,6 @@ typedef ArrayBase<struct Identifier> Identifiers;
 typedef ArrayBase<char> Strings;
 
 #if IN_LLVM
-enum ARCH
-{
-    ARCHinvalid = llvm::Triple::UnknownArch,
-    ARCHx86 = llvm::Triple::x86,
-    ARCHx86_64 = llvm::Triple::x86_64,
-    ARCHppc = llvm::Triple::ppc,
-    ARCHppc_64 = llvm::Triple::ppc64,
-    ARCHarm = llvm::Triple::arm,
-    ARCHthumb = llvm::Triple::thumb,
-};
-
 enum OUTPUTFLAG
 {
     OUTPUTFLAGno,
@@ -200,7 +189,6 @@ struct Param
     char optimize;      // run optimizer
 #endif
     char map;           // generate linker .map file
-    ARCH cpu;           // target CPU
     bool is64bit;       // generate 64 bit code
 #if IN_LLVM
     OS   os;

dmd2/mtype.c

@@ -2923,8 +2923,11 @@ unsigned TypeBasic::alignsize()
 #if IN_LLVM
 unsigned TypeBasic::alignment()
 {
-    if (global.params.cpu == ARCHx86_64 && (ty == Tfloat80 || ty == Timaginary80))
+    if (global.params.targetTriple.getArch() == llvm::Triple::x86_64 &&
+        (ty == Tfloat80 || ty == Timaginary80))
+    {
         return 16;
+    }
     return Type::alignment();
 }
 #endif