Create a documentation category for the new calling convention documentation. Drive-by fixing of duplicate target names from a previous commit.

llvm-svn: 220419

clang/include/clang/Basic/AttrDocs.td

@@ -673,8 +673,17 @@ The semantics are as follows:
   }];
 }
 
+def DocCatCallingConvs : DocumentationCategory<"Calling Conventions"> {
+  let Content = [{
+Clang supports several different calling conventions, depending on the target
+platform and architecture. The calling convention used for a function determines
+how parameters are passed, how results are returned to the caller, and other
+low-level details of calling a function.
+  }];
+}
+
 def PcsDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On ARM targets, this attribute can be used to select calling conventions
 similar to ``stdcall`` on x86. Valid parameter values are "aapcs" and
@@ -683,7 +692,7 @@ similar to ``stdcall`` on x86. Valid parameter values are "aapcs" and
 }
 
 def RegparmDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On 32-bit x86 targets, the regparm attribute causes the compiler to pass
 the first three integer parameters in EAX, EDX, and ECX instead of on the
@@ -693,7 +702,7 @@ are passed via the stack as normal.
 }
 
 def SysVABIDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On Windows x86_64 targets, this attribute changes the calling convention of a
 function to match the default convention used on Sys V targets such as Linux,
@@ -702,7 +711,7 @@ Mac, and BSD. This attribute has no effect on other targets.
 }
 
 def MSABIDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On non-Windows x86_64 targets, this attribute changes the calling convention of
 a function to match the default convention used on Windows x86_64. This
@@ -711,21 +720,21 @@ attribute has no effect on Windows targets or non-x86_64 targets.
 }
 
 def StdCallDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On 32-bit x86 targets, this attribute changes the calling convention of a
 function to clear parameters off of the stack on return. This convention does
 not support variadic calls or unprototyped functions in C, and has no effect on
 x86_64 targets. This calling convention is used widely by the Windows API and
 COM applications.  Documentation for the Visual C++ attribute is available on
-MSDN_.
+MSDN1_.
 
-.. _MSDN: http://msdn.microsoft.com/en-us/library/zxk0tw93.aspx
+.. _MSDN1: http://msdn.microsoft.com/en-us/library/zxk0tw93.aspx
   }];
 }
 
 def FastCallDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On 32-bit x86 targets, this attribute changes the calling convention of a
 function to use ECX and EDX as register parameters and clear parameters off of
@@ -734,23 +743,23 @@ unprototyped functions in C, and has no effect on x86_64 targets. This calling
 convention is supported primarily for compatibility with existing code. Users
 seeking register parameters should use the ``regparm`` attribute, which does
 not require callee-cleanup.  Documentation for the Visual C++ attribute is
-available on MSDN_.
+available on MSDN2_.
 
-.. _MSDN: http://msdn.microsoft.com/en-us/library/6xa169sk.aspx
+.. _MSDN2: http://msdn.microsoft.com/en-us/library/6xa169sk.aspx
   }];
 }
 
 def ThisCallDocs : Documentation {
-  let Category = DocCatFunction;
+  let Category = DocCatCallingConvs;
   let Content = [{
 On 32-bit x86 targets, this attribute changes the calling convention of a
 function to use ECX for the first parameter (typically the implicit ``this``
 parameter of C++ methods) and clear parameters off of the stack on return. This
 convention does not support variadic calls or unprototyped functions in C, and
 has no effect on x86_64 targets. Documentation for the Visual C++ attribute is
-available on MSDN_.
+available on MSDN3_.
 
-.. _MSDN: http://msdn.microsoft.com/en-us/library/ek8tkfbw.aspx
+.. _MSDN3: http://msdn.microsoft.com/en-us/library/ek8tkfbw.aspx
   }];
 }