[Driver] Hook up Haiku ARM support (#67222)

Author: brad0

clang/lib/Basic/Targets.cpp

@@ -219,6 +219,8 @@ std::unique_ptr<TargetInfo> AllocateTarget(const llvm::Triple &Triple,
       return std::make_unique<OpenBSDTargetInfo<ARMleTargetInfo>>(Triple, Opts);
     case llvm::Triple::RTEMS:
       return std::make_unique<RTEMSTargetInfo<ARMleTargetInfo>>(Triple, Opts);
+    case llvm::Triple::Haiku:
+      return std::make_unique<HaikuTargetInfo<ARMleTargetInfo>>(Triple, Opts);
     case llvm::Triple::NaCl:
       return std::make_unique<NaClTargetInfo<ARMleTargetInfo>>(Triple, Opts);
     case llvm::Triple::Win32:

clang/lib/Basic/Targets/ARM.cpp

@@ -257,6 +257,7 @@ ARMTargetInfo::ARMTargetInfo(const llvm::Triple &Triple,
   bool IsFreeBSD = Triple.isOSFreeBSD();
   bool IsOpenBSD = Triple.isOSOpenBSD();
   bool IsNetBSD = Triple.isOSNetBSD();
+  bool IsHaiku = Triple.isOSHaiku();
 
   // FIXME: the isOSBinFormatMachO is a workaround for identifying a Darwin-like
   // environment where size_t is `unsigned long` rather than `unsigned int`
@@ -323,7 +324,7 @@ ARMTargetInfo::ARMTargetInfo(const llvm::Triple &Triple,
     default:
       if (IsNetBSD)
         setABI("apcs-gnu");
-      else if (IsFreeBSD || IsOpenBSD)
+      else if (IsFreeBSD || IsOpenBSD || IsHaiku)
         setABI("aapcs-linux");
       else
         setABI("aapcs");

clang/lib/Driver/ToolChains/Arch/ARM.cpp

@@ -404,6 +404,7 @@ arm::FloatABI arm::getDefaultFloatABI(const llvm::Triple &Triple) {
     }
     break;
 
+  case llvm::Triple::Haiku:
   case llvm::Triple::OpenBSD:
     return FloatABI::SoftFP;
 

clang/test/Driver/arm-abi.c

@@ -33,6 +33,8 @@
 // RUN:   | FileCheck -check-prefix=CHECK-AAPCS-LINUX %s
 // RUN: %clang -target arm--openbsd- %s -### -o %t.o 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHECK-AAPCS-LINUX %s
+// RUN: %clang -target arm--haiku- %s -### -o %t.o 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHECK-AAPCS-LINUX %s
 
 // Otherwise, ABI is selected based on environment
 // RUN: %clang -target arm---android %s -### -o %t.o 2>&1 \

clang/test/Driver/haiku.c

@@ -65,3 +65,8 @@
 // CHECK-X86_64-SHARED-SAME: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-X86_64-SHARED: "{{.*}}ld{{(.exe)?}}"
 // CHECK-X86_64-SHARED-NOT: "[[SYSROOT]]/boot/system/develop/lib/start_dyn.o"
+
+// Check default ARM CPU, ARMv6
+// RUN: %clang -### %s 2>&1 --target=arm-unknown-haiku \
+// RUN:   | FileCheck --check-prefix=CHECK-ARM-CPU %s
+// CHECK-ARM-CPU: "-target-cpu" "arm1176jzf-s"

llvm/lib/TargetParser/ARMTargetParser.cpp

@@ -526,7 +526,8 @@ StringRef ARM::computeDefaultTargetABI(const Triple &TT, StringRef CPU) {
   default:
     if (TT.isOSNetBSD())
       return "apcs-gnu";
-    if (TT.isOSFreeBSD() || TT.isOSOpenBSD() || TT.isOHOSFamily())
+    if (TT.isOSFreeBSD() || TT.isOSOpenBSD() || TT.isOSHaiku() ||
+        TT.isOHOSFamily())
       return "aapcs-linux";
     return "aapcs";
   }
@@ -542,6 +543,7 @@ StringRef ARM::getARMCPUForArch(const llvm::Triple &Triple, StringRef MArch) {
   case llvm::Triple::FreeBSD:
   case llvm::Triple::NetBSD:
   case llvm::Triple::OpenBSD:
+  case llvm::Triple::Haiku:
     if (!MArch.empty() && MArch == "v6")
       return "arm1176jzf-s";
     if (!MArch.empty() && MArch == "v7")
@@ -574,6 +576,8 @@ StringRef ARM::getARMCPUForArch(const llvm::Triple &Triple, StringRef MArch) {
   // If no specific architecture version is requested, return the minimum CPU
   // required by the OS and environment.
   switch (Triple.getOS()) {
+  case llvm::Triple::Haiku:
+    return "arm1176jzf-s";
   case llvm::Triple::NetBSD:
     switch (Triple.getEnvironment()) {
     case llvm::Triple::EABI: