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i386: Fix ix86_function_arg_regno_p to return correct SSE regno for 32bit TARGET_MACHO

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Use up to SSE_REGPARM_MAX registers to pass function parameters
for 32bit Mach-O targets.  Also, define X86_32_MMX_REGPARM_MAX
to return 0 for 32bit Mach-O targets.

2020-11-03  Uroš Bizjak  <ubizjak@gmail.com>

gcc/

	* config/i386/i386.c (ix86_function_arg_regno_p): Use up to
	SSE_REGPARM_MAX registers to pass function parameters
	for 32bit Mach-O targets.
	* config/i386/i386.h (X86_32_MMX_REGPARM_MAX): New macro.
	(MMX_REGPARM_MAX): Use it.
This commit is contained in:
Uros Bizjak 2020-11-03 19:13:57 +01:00
parent 5b01425ec2
commit f4a0e873be
2 changed files with 9 additions and 15 deletions
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20
gcc/config/i386/i386.c
View File

@ -1423,23 +1423,15 @@ ix86_function_arg_regno_p (int regno)
enum calling_abi call_abi;
const int *parm_regs;
if (!TARGET_64BIT)
{
if (TARGET_MACHO)
return (regno < REGPARM_MAX
|| (TARGET_SSE && SSE_REGNO_P (regno) && !fixed_regs[regno]));
else
return (regno < REGPARM_MAX
|| (TARGET_MMX && MMX_REGNO_P (regno)
&& (regno < FIRST_MMX_REG + MMX_REGPARM_MAX))
|| (TARGET_SSE && SSE_REGNO_P (regno)
&& (regno < FIRST_SSE_REG + SSE_REGPARM_MAX)));
}
if (TARGET_SSE && SSE_REGNO_P (regno)
&& (regno < FIRST_SSE_REG + SSE_REGPARM_MAX))
&& regno < FIRST_SSE_REG + SSE_REGPARM_MAX)
return true;
if (!TARGET_64BIT)
return (regno < REGPARM_MAX
|| (TARGET_MMX && MMX_REGNO_P (regno)
&& regno < FIRST_MMX_REG + MMX_REGPARM_MAX));
/* TODO: The function should depend on current function ABI but
builtins.c would need updating then. Therefore we use the
default ABI. */

4
gcc/config/i386/i386.h
View File

@ -1950,7 +1950,9 @@ typedef struct ix86_args {
: X86_64_SSE_REGPARM_MAX) \
: X86_32_SSE_REGPARM_MAX)
#define MMX_REGPARM_MAX (TARGET_64BIT ? 0 : (TARGET_MMX ? 3 : 0))
#define X86_32_MMX_REGPARM_MAX (TARGET_MMX ? (TARGET_MACHO ? 0 : 3) : 0)
#define MMX_REGPARM_MAX (TARGET_64BIT ? 0 : X86_32_MMX_REGPARM_MAX)
/* Specify the machine mode that this machine uses
for the index in the tablejump instruction. */