Stage two of getting CFE top correct.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@39734 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Parse/DeclSpec.cpp b/Parse/DeclSpec.cpp
new file mode 100644
index 0000000..117ff12
--- /dev/null
+++ b/Parse/DeclSpec.cpp
@@ -0,0 +1,285 @@
+//===--- SemaDeclSpec.cpp - Declaration Specifier Semantic Analysis -------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements semantic analysis for declaration specifiers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Parse/DeclSpec.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/SourceLocation.h"
+using namespace clang;
+
+/// getParsedSpecifiers - Return a bitmask of which flavors of specifiers this
+///
+unsigned DeclSpec::getParsedSpecifiers() const {
+ unsigned Res = 0;
+ if (StorageClassSpec != SCS_unspecified ||
+ SCS_thread_specified)
+ Res |= PQ_StorageClassSpecifier;
+
+ if (TypeQualifiers != TQ_unspecified)
+ Res |= PQ_TypeQualifier;
+
+ if (hasTypeSpecifier())
+ Res |= PQ_TypeSpecifier;
+
+ if (FS_inline_specified)
+ Res |= PQ_FunctionSpecifier;
+ return Res;
+}
+
+const char *DeclSpec::getSpecifierName(DeclSpec::SCS S) {
+ switch (S) {
+ default: assert(0 && "Unknown typespec!");
+ case DeclSpec::SCS_unspecified: return "unspecified";
+ case DeclSpec::SCS_typedef: return "typedef";
+ case DeclSpec::SCS_extern: return "extern";
+ case DeclSpec::SCS_static: return "static";
+ case DeclSpec::SCS_auto: return "auto";
+ case DeclSpec::SCS_register: return "register";
+ }
+}
+
+static bool BadSpecifier(DeclSpec::SCS S, const char *&PrevSpec) {
+ PrevSpec = DeclSpec::getSpecifierName(S);
+ return true;
+}
+
+static bool BadSpecifier(DeclSpec::TSW W, const char *&PrevSpec) {
+ switch (W) {
+ case DeclSpec::TSW_unspecified: PrevSpec = "unspecified"; break;
+ case DeclSpec::TSW_short: PrevSpec = "short"; break;
+ case DeclSpec::TSW_long: PrevSpec = "long"; break;
+ case DeclSpec::TSW_longlong: PrevSpec = "long long"; break;
+ }
+ return true;
+}
+
+static bool BadSpecifier(DeclSpec::TSC C, const char *&PrevSpec) {
+ switch (C) {
+ case DeclSpec::TSC_unspecified: PrevSpec = "unspecified"; break;
+ case DeclSpec::TSC_imaginary: PrevSpec = "imaginary"; break;
+ case DeclSpec::TSC_complex: PrevSpec = "complex"; break;
+ }
+ return true;
+}
+
+
+static bool BadSpecifier(DeclSpec::TSS S, const char *&PrevSpec) {
+ switch (S) {
+ case DeclSpec::TSS_unspecified: PrevSpec = "unspecified"; break;
+ case DeclSpec::TSS_signed: PrevSpec = "signed"; break;
+ case DeclSpec::TSS_unsigned: PrevSpec = "unsigned"; break;
+ }
+ return true;
+}
+
+const char *DeclSpec::getSpecifierName(DeclSpec::TST T) {
+ switch (T) {
+ default: assert(0 && "Unknown typespec!");
+ case DeclSpec::TST_unspecified: return "unspecified";
+ case DeclSpec::TST_void: return "void";
+ case DeclSpec::TST_char: return "char";
+ case DeclSpec::TST_int: return "int";
+ case DeclSpec::TST_float: return "float";
+ case DeclSpec::TST_double: return "double";
+ case DeclSpec::TST_bool: return "_Bool";
+ case DeclSpec::TST_decimal32: return "_Decimal32";
+ case DeclSpec::TST_decimal64: return "_Decimal64";
+ case DeclSpec::TST_decimal128: return "_Decimal128";
+ case DeclSpec::TST_enum: return "enum";
+ case DeclSpec::TST_union: return "union";
+ case DeclSpec::TST_struct: return "struct";
+ case DeclSpec::TST_typedef: return "typedef";
+ }
+}
+
+static bool BadSpecifier(DeclSpec::TST T, const char *&PrevSpec) {
+ PrevSpec = DeclSpec::getSpecifierName(T);
+ return true;
+}
+
+static bool BadSpecifier(DeclSpec::TQ T, const char *&PrevSpec) {
+ switch (T) {
+ case DeclSpec::TQ_unspecified: PrevSpec = "unspecified"; break;
+ case DeclSpec::TQ_const: PrevSpec = "const"; break;
+ case DeclSpec::TQ_restrict: PrevSpec = "restrict"; break;
+ case DeclSpec::TQ_volatile: PrevSpec = "volatile"; break;
+ }
+ return true;
+}
+
+bool DeclSpec::SetStorageClassSpec(SCS S, SourceLocation Loc,
+ const char *&PrevSpec) {
+ if (StorageClassSpec != SCS_unspecified)
+ return BadSpecifier(StorageClassSpec, PrevSpec);
+ StorageClassSpec = S;
+ StorageClassSpecLoc = Loc;
+ return false;
+}
+
+bool DeclSpec::SetStorageClassSpecThread(SourceLocation Loc,
+ const char *&PrevSpec) {
+ if (SCS_thread_specified) {
+ PrevSpec = "__thread";
+ return true;
+ }
+ SCS_thread_specified = true;
+ SCS_threadLoc = Loc;
+ return false;
+}
+
+
+/// These methods set the specified attribute of the DeclSpec, but return true
+/// and ignore the request if invalid (e.g. "extern" then "auto" is
+/// specified).
+bool DeclSpec::SetTypeSpecWidth(TSW W, SourceLocation Loc,
+ const char *&PrevSpec) {
+ if (TypeSpecWidth != TSW_unspecified &&
+ // Allow turning long -> long long.
+ (W != TSW_longlong || TypeSpecWidth != TSW_long))
+ return BadSpecifier(TypeSpecWidth, PrevSpec);
+ TypeSpecWidth = W;
+ TSWLoc = Loc;
+ return false;
+}
+
+bool DeclSpec::SetTypeSpecComplex(TSC C, SourceLocation Loc,
+ const char *&PrevSpec) {
+ if (TypeSpecComplex != TSC_unspecified)
+ return BadSpecifier(TypeSpecComplex, PrevSpec);
+ TypeSpecComplex = C;
+ TSCLoc = Loc;
+ return false;
+}
+
+bool DeclSpec::SetTypeSpecSign(TSS S, SourceLocation Loc,
+ const char *&PrevSpec) {
+ if (TypeSpecSign != TSS_unspecified)
+ return BadSpecifier(TypeSpecSign, PrevSpec);
+ TypeSpecSign = S;
+ TSSLoc = Loc;
+ return false;
+}
+
+bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
+ const char *&PrevSpec, void *Rep) {
+ if (TypeSpecType != TST_unspecified)
+ return BadSpecifier(TypeSpecType, PrevSpec);
+ TypeSpecType = T;
+ TypeRep = Rep;
+ TSTLoc = Loc;
+ return false;
+}
+
+bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec,
+ const LangOptions &Lang) {
+ // Duplicates turn into warnings pre-C99.
+ if ((TypeQualifiers & T) && !Lang.C99)
+ return BadSpecifier(T, PrevSpec);
+ TypeQualifiers |= T;
+
+ switch (T) {
+ default: assert(0 && "Unknown type qualifier!");
+ case TQ_const: TQ_constLoc = Loc; break;
+ case TQ_restrict: TQ_restrictLoc = Loc; break;
+ case TQ_volatile: TQ_volatileLoc = Loc; break;
+ }
+ return false;
+}
+
+bool DeclSpec::SetFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec){
+ // 'inline inline' is ok.
+ FS_inline_specified = true;
+ FS_inlineLoc = Loc;
+ return false;
+}
+
+
+/// Finish - This does final analysis of the declspec, rejecting things like
+/// "_Imaginary" (lacking an FP type). This returns a diagnostic to issue or
+/// diag::NUM_DIAGNOSTICS if there is no error. After calling this method,
+/// DeclSpec is guaranteed self-consistent, even if an error occurred.
+void DeclSpec::Finish(Diagnostic &D, const LangOptions &Lang) {
+ // Check the type specifier components first.
+
+ // signed/unsigned are only valid with int/char.
+ if (TypeSpecSign != TSS_unspecified) {
+ if (TypeSpecType == TST_unspecified)
+ TypeSpecType = TST_int; // unsigned -> unsigned int, signed -> signed int.
+ else if (TypeSpecType != TST_int && TypeSpecType != TST_char) {
+ Diag(D, TSSLoc, diag::err_invalid_sign_spec,
+ getSpecifierName(TypeSpecType));
+ // signed double -> double.
+ TypeSpecSign = TSS_unspecified;
+ }
+ }
+
+ // Validate the width of the type.
+ switch (TypeSpecWidth) {
+ case TSW_unspecified: break;
+ case TSW_short: // short int
+ case TSW_longlong: // long long int
+ if (TypeSpecType == TST_unspecified)
+ TypeSpecType = TST_int; // short -> short int, long long -> long long int.
+ else if (TypeSpecType != TST_int) {
+ Diag(D, TSWLoc,
+ TypeSpecWidth == TSW_short ? diag::err_invalid_short_spec
+ : diag::err_invalid_longlong_spec,
+ getSpecifierName(TypeSpecType));
+ TypeSpecType = TST_int;
+ }
+ break;
+ case TSW_long: // long double, long int
+ if (TypeSpecType == TST_unspecified)
+ TypeSpecType = TST_int; // long -> long int.
+ else if (TypeSpecType != TST_int && TypeSpecType != TST_double) {
+ Diag(D, TSWLoc, diag::err_invalid_long_spec,
+ getSpecifierName(TypeSpecType));
+ TypeSpecType = TST_int;
+ }
+ break;
+ }
+
+ // TODO: if the implementation does not implement _Complex or _Imaginary,
+ // disallow their use. Need information about the backend.
+ if (TypeSpecComplex != TSC_unspecified) {
+ if (TypeSpecType == TST_unspecified) {
+ Diag(D, TSCLoc, diag::ext_plain_complex);
+ TypeSpecType = TST_double; // _Complex -> _Complex double.
+ } else if (TypeSpecType == TST_int || TypeSpecType == TST_char) {
+ // Note that this intentionally doesn't include _Complex _Bool.
+ Diag(D, TSTLoc, diag::ext_integer_complex);
+ } else if (TypeSpecType != TST_float && TypeSpecType != TST_double) {
+ Diag(D, TSCLoc, diag::err_invalid_complex_spec,
+ getSpecifierName(TypeSpecType));
+ TypeSpecComplex = TSC_unspecified;
+ }
+ }
+
+ // Verify __thread.
+ if (SCS_thread_specified) {
+ if (StorageClassSpec == SCS_unspecified) {
+ StorageClassSpec = SCS_extern; // '__thread int' -> 'extern __thread int'
+ } else if (StorageClassSpec != SCS_extern &&
+ StorageClassSpec != SCS_static) {
+ Diag(D, getStorageClassSpecLoc(), diag::err_invalid_thread_spec,
+ getSpecifierName(StorageClassSpec));
+ SCS_thread_specified = false;
+ }
+ }
+
+ // Okay, now we can infer the real type.
+ // TODO: infer real type.
+
+ // TODO: return "auto function" and other bad things based on the real type.
+
+ // 'data definition has no type or storage class'?
+}