Make a major restructuring of the clang tree: introduce a top-level

lib dir and move all the libraries into it.  This follows the main
llvm tree, and allows the libraries to be built in parallel.  The
top level now enforces that all the libs are built before Driver,
but we don't care what order the libs are built in.  This speeds
up parallel builds, particularly incremental ones.

llvm-svn: 48402

1 files changed, 210 insertions, 0 deletions

diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
new file mode 100644
index 00000000000..0a561d75cb8
--- /dev/null
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -0,0 +1,210 @@
+//===--- TargetInfo.cpp - Information about Target machine ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements the TargetInfo and TargetInfoImpl interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/AST/Builtins.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/STLExtras.h"
+using namespace clang;
+
+// TargetInfo Constructor.
+TargetInfo::TargetInfo(const std::string &T) : Triple(T) {
+  // Set defaults.  These should be overridden by concrete targets as needed.
+  CharIsSigned = true;
+  WCharWidth = WCharAlign = 32;
+  FloatFormat = &llvm::APFloat::IEEEsingle;
+  DoubleFormat = &llvm::APFloat::IEEEdouble;
+  LongDoubleFormat = &llvm::APFloat::IEEEdouble;
+}
+
+// Out of line virtual dtor for TargetInfo.
+TargetInfo::~TargetInfo() {}
+
+//===----------------------------------------------------------------------===//
+
+
+static void removeGCCRegisterPrefix(const char *&Name) {
+  if (Name[0] == '%' || Name[0] == '#')
+    Name++;
+}
+
+/// isValidGCCRegisterName - Returns whether the passed in string
+/// is a valid register name according to GCC. This is used by Sema for
+/// inline asm statements.
+bool TargetInfo::isValidGCCRegisterName(const char *Name) const {
+  const char * const *Names;
+  unsigned NumNames;
+  
+  // Get rid of any register prefix.
+  removeGCCRegisterPrefix(Name);
+
+  
+  if (strcmp(Name, "memory") == 0 ||
+      strcmp(Name, "cc") == 0)
+    return true;
+  
+  getGCCRegNames(Names, NumNames);
+  
+  // If we have a number it maps to an entry in the register name array.
+  if (isdigit(Name[0])) {
+    char *End;
+    int n = (int)strtol(Name, &End, 0);
+    if (*End == 0)
+      return n >= 0 && (unsigned)n < NumNames;
+  }
+
+  // Check register names.
+  for (unsigned i = 0; i < NumNames; i++) {
+    if (strcmp(Name, Names[i]) == 0)
+      return true;
+  }
+  
+  // Now check aliases.
+  const GCCRegAlias *Aliases;
+  unsigned NumAliases;
+  
+  getGCCRegAliases(Aliases, NumAliases);
+  for (unsigned i = 0; i < NumAliases; i++) {
+    for (unsigned j = 0 ; j < llvm::array_lengthof(Aliases[i].Aliases); j++) {
+      if (!Aliases[i].Aliases[j])
+        break;
+      if (strcmp(Aliases[i].Aliases[j], Name) == 0)
+        return true;
+    }
+  }
+  
+  return false;
+}
+
+const char *TargetInfo::getNormalizedGCCRegisterName(const char *Name) const {
+  assert(isValidGCCRegisterName(Name) && "Invalid register passed in");
+  
+  removeGCCRegisterPrefix(Name);
+    
+  const char * const *Names;
+  unsigned NumNames;
+
+  getGCCRegNames(Names, NumNames);
+
+  // First, check if we have a number.
+  if (isdigit(Name[0])) {
+    char *End;
+    int n = (int)strtol(Name, &End, 0);
+    if (*End == 0) {
+      assert(n >= 0 && (unsigned)n < NumNames && 
+             "Out of bounds register number!");
+      return Names[n];
+    }
+  }
+  
+  // Now check aliases.
+  const GCCRegAlias *Aliases;
+  unsigned NumAliases;
+  
+  getGCCRegAliases(Aliases, NumAliases);
+  for (unsigned i = 0; i < NumAliases; i++) {
+    for (unsigned j = 0 ; j < llvm::array_lengthof(Aliases[i].Aliases); j++) {
+      if (!Aliases[i].Aliases[j])
+        break;
+      if (strcmp(Aliases[i].Aliases[j], Name) == 0)
+        return Aliases[i].Register;
+    }
+  }
+  
+  return Name;
+}
+
+bool TargetInfo::validateOutputConstraint(const char *Name, 
+                                          ConstraintInfo &info) const
+{
+  // An output constraint must start with '=' or '+'
+  if (*Name != '=' && *Name != '+')
+    return false;
+
+  if (*Name == '+')
+    info = CI_ReadWrite;
+  else
+    info = CI_None;
+
+  Name++;
+  while (*Name) {
+    switch (*Name) {
+    default:
+      if (!validateAsmConstraint(*Name, info)) {
+        // FIXME: This assert is in place temporarily 
+        // so we can add more constraints as we hit it.
+        // Eventually, an unknown constraint should just be treated as 'g'.
+        assert(0 && "Unknown output constraint type!");
+      }
+    case '&': // early clobber.
+      break;
+    case 'r': // general register.
+      info = (ConstraintInfo)(info|CI_AllowsRegister);
+      break;
+    case 'm': // memory operand.
+      info = (ConstraintInfo)(info|CI_AllowsMemory);
+      break;
+    case 'g': // general register, memory operand or immediate integer.
+      info = (ConstraintInfo)(info|CI_AllowsMemory|CI_AllowsRegister);
+      break;
+    }
+    
+    Name++;
+  }
+  
+  return true;
+}
+
+bool TargetInfo::validateInputConstraint(const char *Name,
+                                         unsigned NumOutputs,
+                                         ConstraintInfo &info) const {
+  while (*Name) {
+    switch (*Name) {
+    default:
+      // Check if we have a matching constraint
+      if (*Name >= '0' && *Name <= '9') {
+        unsigned i = *Name - '0';
+        
+        // Check if matching constraint is out of bounds.
+        if (i >= NumOutputs)
+          return false;
+      } else if (!validateAsmConstraint(*Name, info)) {
+        // FIXME: This assert is in place temporarily 
+        // so we can add more constraints as we hit it.
+        // Eventually, an unknown constraint should just be treated as 'g'.
+        assert(0 && "Unknown input constraint type!");
+      }        
+    case '%': // commutative
+      // FIXME: Fail if % is used with the last operand.
+      break;
+    case 'i': // immediate integer.
+    case 'I':
+    case 'n': // immediate integer with a known value.
+      break;
+    case 'r': // general register.
+      info = (ConstraintInfo)(info|CI_AllowsRegister);
+      break;
+    case 'm': // memory operand.
+      info = (ConstraintInfo)(info|CI_AllowsMemory);
+      break;
+    case 'g': // general register, memory operand or immediate integer.
+      info = (ConstraintInfo)(info|CI_AllowsMemory|CI_AllowsRegister);
+      break;
+    }
+    
+    Name++;
+  }
+  
+  return true;
+}