Replace getOS() == llvm::Triple::*BSD with isOS*BSD() [NFCI]

Replace multiple comparisons of getOS() value with FreeBSD, NetBSD,
OpenBSD and DragonFly with matching isOS*BSD() methods.  This should
improve the consistency of coding style without changing the behavior.
Direct getOS() comparisons were left whenever used in switch or switch-
like context.

Differential Revision: https://reviews.llvm.org/D55916

llvm-svn: 349752
diff --git a/clang/lib/Basic/Targets/AArch64.cpp b/clang/lib/Basic/Targets/AArch64.cpp
index 376cba6..62919a0 100644
--- a/clang/lib/Basic/Targets/AArch64.cpp
+++ b/clang/lib/Basic/Targets/AArch64.cpp
@@ -37,11 +37,11 @@
 AArch64TargetInfo::AArch64TargetInfo(const llvm::Triple &Triple,
                                      const TargetOptions &Opts)
     : TargetInfo(Triple), ABI("aapcs") {
-  if (getTriple().getOS() == llvm::Triple::OpenBSD) {
+  if (getTriple().isOSOpenBSD()) {
     Int64Type = SignedLongLong;
     IntMaxType = SignedLongLong;
   } else {
-    if (!getTriple().isOSDarwin() && getTriple().getOS() != llvm::Triple::NetBSD)
+    if (!getTriple().isOSDarwin() && !getTriple().isOSNetBSD())
       WCharType = UnsignedInt;
 
     Int64Type = SignedLong;
diff --git a/clang/lib/Basic/Targets/ARM.cpp b/clang/lib/Basic/Targets/ARM.cpp
index cb202ea..16644ac 100644
--- a/clang/lib/Basic/Targets/ARM.cpp
+++ b/clang/lib/Basic/Targets/ARM.cpp
@@ -28,8 +28,8 @@
   DoubleAlign = LongLongAlign = LongDoubleAlign = SuitableAlign = 64;
   const llvm::Triple &T = getTriple();
 
-  bool IsNetBSD = T.getOS() == llvm::Triple::NetBSD;
-  bool IsOpenBSD = T.getOS() == llvm::Triple::OpenBSD;
+  bool IsNetBSD = T.isOSNetBSD();
+  bool IsOpenBSD = T.isOSOpenBSD();
   if (!T.isOSWindows() && !IsNetBSD && !IsOpenBSD)
     WCharType = UnsignedInt;
 
@@ -217,8 +217,8 @@
                              const TargetOptions &Opts)
     : TargetInfo(Triple), FPMath(FP_Default), IsAAPCS(true), LDREX(0),
       HW_FP(0) {
-  bool IsOpenBSD = Triple.getOS() == llvm::Triple::OpenBSD;
-  bool IsNetBSD = Triple.getOS() == llvm::Triple::NetBSD;
+  bool IsOpenBSD = Triple.isOSOpenBSD();
+  bool IsNetBSD = Triple.isOSNetBSD();
 
   // FIXME: the isOSBinFormatMachO is a workaround for identifying a Darwin-like
   // environment where size_t is `unsigned long` rather than `unsigned int`
@@ -282,9 +282,9 @@
       setABI("apcs-gnu");
       break;
     default:
-      if (Triple.getOS() == llvm::Triple::NetBSD)
+      if (IsNetBSD)
         setABI("apcs-gnu");
-      else if (Triple.getOS() == llvm::Triple::OpenBSD)
+      else if (IsOpenBSD)
         setABI("aapcs-linux");
       else
         setABI("aapcs");
diff --git a/clang/lib/Basic/Targets/Mips.h b/clang/lib/Basic/Targets/Mips.h
index f207809..d49f498 100644
--- a/clang/lib/Basic/Targets/Mips.h
+++ b/clang/lib/Basic/Targets/Mips.h
@@ -78,8 +78,8 @@
 
     CPU = ABI == "o32" ? "mips32r2" : "mips64r2";
 
-    CanUseBSDABICalls = Triple.getOS() == llvm::Triple::FreeBSD ||
-                        Triple.getOS() == llvm::Triple::OpenBSD;
+    CanUseBSDABICalls = Triple.isOSFreeBSD() ||
+                        Triple.isOSOpenBSD();
   }
 
   bool isIEEE754_2008Default() const {
@@ -132,7 +132,7 @@
   void setN32N64ABITypes() {
     LongDoubleWidth = LongDoubleAlign = 128;
     LongDoubleFormat = &llvm::APFloat::IEEEquad();
-    if (getTriple().getOS() == llvm::Triple::FreeBSD) {
+    if (getTriple().isOSFreeBSD()) {
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble();
     }
@@ -142,7 +142,7 @@
 
   void setN64ABITypes() {
     setN32N64ABITypes();
-    if (getTriple().getOS() == llvm::Triple::OpenBSD) {
+    if (getTriple().isOSOpenBSD()) {
       Int64Type = SignedLongLong;
     } else {
       Int64Type = SignedLong;
diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
index db54fcf..6cfbed1 100644
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -83,8 +83,8 @@
   if (getTriple().getArch() == llvm::Triple::ppc64le) {
     Builder.defineMacro("_LITTLE_ENDIAN");
   } else {
-    if (getTriple().getOS() != llvm::Triple::NetBSD &&
-        getTriple().getOS() != llvm::Triple::OpenBSD)
+    if (!getTriple().isOSNetBSD() &&
+        !getTriple().isOSOpenBSD())
       Builder.defineMacro("_BIG_ENDIAN");
   }
 
diff --git a/clang/lib/Basic/Targets/PPC.h b/clang/lib/Basic/Targets/PPC.h
index 30f13c9..058970a 100644
--- a/clang/lib/Basic/Targets/PPC.h
+++ b/clang/lib/Basic/Targets/PPC.h
@@ -331,7 +331,7 @@
       break;
     }
 
-    if (getTriple().getOS() == llvm::Triple::FreeBSD) {
+    if (getTriple().isOSFreeBSD()) {
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble();
     }
diff --git a/clang/lib/Basic/Targets/Sparc.h b/clang/lib/Basic/Targets/Sparc.h
index af2189f..5ae305b 100644
--- a/clang/lib/Basic/Targets/Sparc.h
+++ b/clang/lib/Basic/Targets/Sparc.h
@@ -199,7 +199,7 @@
     LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
 
     // OpenBSD uses long long for int64_t and intmax_t.
-    if (getTriple().getOS() == llvm::Triple::OpenBSD)
+    if (getTriple().isOSOpenBSD())
       IntMaxType = SignedLongLong;
     else
       IntMaxType = SignedLong;