OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

* config/nvptx/nvptx.c: Expand some comments.

Browse Source 
From-SVN: r226075
This commit is contained in:
Bernd Schmidt 2015-07-22 15:30:14 +00:00 committed by Bernd Schmidt
parent 252207bd03
commit ecf6e535fc
2 changed files with 28 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/ChangeLog
View File

@ -1,3 +1,7 @@
2015-07-22 Bernd Schmidt <bernds@codesourcery.com>
* config/nvptx/nvptx.c: Expand some comments.
2015-07-22 James Greenhalgh <james.greenhalgh@arm.com>
* config/arm/cortex-a53 (cortex_53_advsimd): Rename to...

29
gcc/config/nvptx/nvptx.c
View File

@ -266,7 +266,9 @@ write_as_kernel (tree attrs)
|| lookup_attribute ("omp target entrypoint", attrs) != NULL_TREE);
}
/* Write a function decl for DECL to S, where NAME is the name to be used. */
/* Write a function decl for DECL to S, where NAME is the name to be used.
This includes ptx .visible or .extern specifiers, .func or .kernel, and
argument and return types. */
static void
nvptx_write_function_decl (std::stringstream &s, const char *name, const_tree decl)
@ -756,7 +758,11 @@ nvptx_end_call_args (void)
free_EXPR_LIST_list (&cfun->machine->call_args);
}
/* Emit the sequence for a call. */
/* Emit the sequence for a call to ADDRESS, setting RETVAL. Keep
track of whether calls involving static chains or varargs were seen
in the current function.
For libcalls, maintain a hash table of decls we have seen, and
record a function decl for later when encountering a new one. */
void
nvptx_expand_call (rtx retval, rtx address)
@ -815,6 +821,8 @@ nvptx_expand_call (rtx retval, rtx address)
XVECEXP (pat, 0, nargs + 1) = gen_rtx_USE (VOIDmode, this_arg);
}
/* Construct the call insn, including a USE for each argument pseudo
register. These will be used when printing the insn. */
int i;
rtx arg;
for (i = 1, arg = cfun->machine->call_args; arg; arg = XEXP (arg, 1), i++)
@ -832,6 +840,11 @@ nvptx_expand_call (rtx retval, rtx address)
t = gen_rtx_SET (tmp_retval, t);
}
XVECEXP (pat, 0, 0) = t;
/* If this is a libcall, decl_type is NULL. For a call to a non-libcall
undeclared function, we'll have an external decl without arg types.
In either case we have to try to construct a ptx declaration from one of
the calls to the function. */
if (!REG_P (callee)
&& (decl_type == NULL_TREE
|| (external_decl && TYPE_ARG_TYPES (decl_type) == NULL_TREE)))
@ -1194,7 +1207,10 @@ nvptx_addr_space_from_address (rtx addr)
return ADDR_SPACE_GLOBAL;
}
/* Machinery to output constant initializers. */
/* Machinery to output constant initializers. When beginning an initializer,
we decide on a chunk size (which is visible in ptx in the type used), and
then all initializer data is buffered until a chunk is filled and ready to
be written out. */
/* Used when assembling integers to ensure data is emitted in
pieces whose size matches the declaration we printed. */
@ -1464,7 +1480,8 @@ nvptx_assemble_undefined_decl (FILE *file, const char *name, const_tree decl)
}
/* Output INSN, which is a call to CALLEE with result RESULT. For ptx, this
involves writing .param declarations and in/out copies into them. */
involves writing .param declarations and in/out copies into them. For
indirect calls, also write the .callprototype. */
const char *
nvptx_output_call_insn (rtx_insn *insn, rtx result, rtx callee)
@ -1484,6 +1501,7 @@ nvptx_output_call_insn (rtx_insn *insn, rtx result, rtx callee)
false));
}
/* Ensure we have a ptx declaration in the output if necessary. */
if (GET_CODE (callee) == SYMBOL_REF)
{
decl = SYMBOL_REF_DECL (callee);
@ -2057,7 +2075,8 @@ nvptx_file_start (void)
fputs ("// END PREAMBLE\n", asm_out_file);
}
/* Write out the function declarations we've collected. */
/* Write out the function declarations we've collected and declare storage
for the broadcast buffer. */
static void
nvptx_file_end (void)