AMDGPU: Parse r600 CPU name early and expose FMAF capability

[jvesely]

Summary

Improve amdgcn macro test

[arsenm]

LGTM

cfe/trunk/lib/Basic/Targets/AMDGPU.cpp

void AMDGPUTargetInfo::setAddressSpaceMap(bool DefaultIsPrivate) {
   } else {
     AddrSpaceMap = DefaultIsPrivate ? &AMDGPUPrivIsZeroDefIsPrivMap
                                     : &AMDGPUPrivIsZeroDefIsGenMap;
   }
 }
 
 AMDGPUTargetInfo::AMDGPUTargetInfo(const llvm::Triple &Triple,
                                    const TargetOptions &Opts)
-    : TargetInfo(Triple), GPU(isAMDGCN(Triple) ? GK_GFX6 : GK_R600),
+    : TargetInfo(Triple),
+      GPU(isAMDGCN(Triple) ? GK_GFX6 : parseR600Name(Opts.CPU)),
       hasFP64(false), hasFMAF(false), hasLDEXPF(false),
       AS(isGenericZero(Triple)) {
   if (getTriple().getArch() == llvm::Triple::amdgcn) {
     hasFP64 = true;
     hasFMAF = true;
     hasLDEXPF = true;
   }
+  if (getTriple().getArch() == llvm::Triple::r600) {
+    if (GPU == GK_EVERGREEN_DOUBLE_OPS || GPU == GK_CAYMAN) {
+      hasFMAF = true;
+    }
+  }
   auto IsGenericZero = isGenericZero(Triple);
   resetDataLayout(getTriple().getArch() == llvm::Triple::amdgcn
                       ? (IsGenericZero ? DataLayoutStringSIGenericIsZero
                                        : DataLayoutStringSIPrivateIsZero)
                       : DataLayoutStringR600);
   assert(DataLayout->getAllocaAddrSpace() == AS.Private);
 
   setAddressSpaceMap(Triple.getOS() == llvm::Triple::Mesa3D ||

cfe/trunk/test/Preprocessor/predefined-arch-macros.c

 // CHECK_SYSTEMZ_ZVECTOR: #define __VEC__ 10302
 
 // Begin amdgcn tests ----------------
 //
 // RUN: %clang -march=amdgcn -E -dM %s -o - 2>&1 \
 // RUN:     -target amdgcn-unknown-unknown \
 // RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_AMDGCN
 // CHECK_AMDGCN: #define __AMDGCN__ 1
+// CHECK_AMDGCN: #define __HAS_FMAF__ 1
+// CHECK_AMDGCN: #define __HAS_FP64__ 1
+// CHECK_AMDGCN: #define __HAS_LDEXPF__ 1
 
 // Begin r600 tests ----------------
 //
 // RUN: %clang -march=amdgcn -E -dM %s -o - 2>&1 \
 // RUN:     -target r600-unknown-unknown \
 // RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_R600
 // CHECK_R600: #define __R600__ 1
+// CHECK_R600-NOT: #define __HAS_FMAF__ 1
+
+// RUN: %clang -march=amdgcn -mcpu=cypress -E -dM %s -o - 2>&1 \
+// RUN:     -target r600-unknown-unknown \
+// RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_R600_FP64
+// CHECK_R600_FP64-DAG: #define __R600__ 1
+// CHECK_R600_FP64-DAG: #define __HAS_FMAF__ 1