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rs6000.c (rs6000_global_entry_point_needed_p): Rename to rs6000_global_entry_point_prologue_needed_p.

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[gcc]

2019-05-22  Bill Schmidt  <wschmidt@linux.ibm.com>

	* config/rs6000/rs6000.c (rs6000_global_entry_point_needed_p):
	Rename to rs6000_global_entry_point_prologue_needed_p.  Return
	false for PC-relative functions.
	(rs6000_output_function_prologue): Change called function name to
	rs6000_global_entry_point_prologue_needed_p.  Emit ".localentry
	name,1" for PC-relative functions.
	(rs6000_elf_declare_function_name): Change called function name to
	rs6000_global_entry_point_prologue_needed_p.

[gcc/testsuite]

2019-05-22  Bill Schmidt  <wschmidt@linux.ibm.com>

	* gcc.target/powerpc/localentry-1.c: New file.

From-SVN: r271577
This commit is contained in:
Bill Schmidt 2019-05-23 20:33:02 +00:00 committed by William Schmidt
parent 103d91c7cb
commit 99f8432359
4 changed files with 54 additions and 4 deletions
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11
gcc/ChangeLog
View File

@ -1,3 +1,14 @@
2019-05-23 Bill Schmidt <wschmidt@linux.ibm.com>
* config/rs6000/rs6000.c (rs6000_global_entry_point_needed_p):
Rename to rs6000_global_entry_point_prologue_needed_p. Return
false for PC-relative functions.
(rs6000_output_function_prologue): Change called function name to
rs6000_global_entry_point_prologue_needed_p. Emit ".localentry
name,1" for PC-relative functions.
(rs6000_elf_declare_function_name): Change called function name to
rs6000_global_entry_point_prologue_needed_p.
2019-05-23 Uroš Bizjak <ubizjak@gmail.com>
PR target/90552

25
gcc/config/rs6000/rs6000.c
View File

@ -26180,7 +26180,7 @@ split_stack_arg_pointer_used_p (void)
/* Return whether we need to emit an ELFv2 global entry point prologue. */
static bool
rs6000_global_entry_point_needed_p (void)
rs6000_global_entry_point_prologue_needed_p (void)
{
/* Only needed for the ELFv2 ABI. */
if (DEFAULT_ABI != ABI_ELFv2)
@ -26191,6 +26191,10 @@ rs6000_global_entry_point_needed_p (void)
if (TARGET_SINGLE_PIC_BASE)
return false;
/* PC-relative functions never generate a global entry point prologue. */
if (rs6000_pcrel_p (cfun))
return false;
/* Ensure we have a global entry point for thunks. ??? We could
avoid that if the target routine doesn't need a global entry point,
but we do not know whether this is the case at this point. */
@ -27547,10 +27551,9 @@ rs6000_output_function_prologue (FILE *file)
/* ELFv2 ABI r2 setup code and local entry point. This must follow
immediately after the global entry point label. */
if (rs6000_global_entry_point_needed_p ())
if (rs6000_global_entry_point_prologue_needed_p ())
{
const char *name = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
(*targetm.asm_out.internal_label) (file, "LCF", rs6000_pic_labelno);
if (TARGET_CMODEL != CMODEL_LARGE)
@ -27601,6 +27604,19 @@ rs6000_output_function_prologue (FILE *file)
fputs ("\n", file);
}
else if (rs6000_pcrel_p (cfun))
{
const char *name = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
/* All functions compiled to use PC-relative addressing will
have a .localentry value of 0 or 1. For now we set it to
1 all the time, indicating that the function may clobber
the TOC register r2. Later we may optimize this by setting
it to 0 if the function is a leaf and does not clobber r2. */
fputs ("\t.localentry\t", file);
assemble_name (file, name);
fputs (",1\n", file);
}
/* Output -mprofile-kernel code. This needs to be done here instead of
in output_function_profile since it must go after the ELFv2 ABI
local entry point. */
@ -33335,7 +33351,8 @@ rs6000_elf_declare_function_name (FILE *file, const char *name, tree decl)
ASM_OUTPUT_TYPE_DIRECTIVE (file, name, "function");
ASM_DECLARE_RESULT (file, DECL_RESULT (decl));
if (TARGET_CMODEL == CMODEL_LARGE && rs6000_global_entry_point_needed_p ())
if (TARGET_CMODEL == CMODEL_LARGE
&& rs6000_global_entry_point_prologue_needed_p ())
{
char buf[256];

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2019-05-23 Bill Schmidt <wschmidt@linux.ibm.com>
* gcc.target/powerpc/localentry-1.c: New file.
2019-05-23 Uroš Bizjak <ubizjak@gmail.com>
PR target/90552

18
gcc/testsuite/gcc.target/powerpc/localentry-1.c Normal file
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@ -0,0 +1,18 @@
/* { dg-do compile } */
/* { dg-options "-mdejagnu-cpu=future -O2" } */
/* { dg-require-effective-target powerpc_elfv2 } */
/* Ensure we generate ".localentry fn,1" for both leaf and non-leaf
functions. */
extern int y (int);
int x (void)
{
return y (5);
}
void z (void) { };
/* { dg-final { scan-assembler {\.localentry\t\mx,1\M} } } */
/* { dg-final { scan-assembler {\.localentry\t\mz,1\M} } } */