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re PR target/34042 (Segfault in mips_cannot_change_mode_class)

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gcc/
	PR target/34042
	* config/mips/mips.c (mips_return_fpr_single): New function.
	(mips_function_value): Use it when returning single-field
	aggregates in FPRs.
	(mips_expand_call): Handle the PARALLELs created by
	mips_return_fpr_single.

From-SVN: r130119
This commit is contained in:
Richard Sandiford 2007-11-12 20:05:46 +00:00 • committed by Richard Sandiford
parent 3aa64f2ccc
commit fd0d4c1fbb
2 changed files with 45 additions and 4 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2007-11-12 Richard Sandiford <rsandifo@nildram.co.uk>
PR target/34042
* config/mips/mips.c (mips_return_fpr_single): New function.
(mips_function_value): Use it when returning single-field
aggregates in FPRs.
(mips_expand_call): Handle the PARALLELs created by
mips_return_fpr_single.
2007-11-12 Richard Guenther <rguenther@suse.de>
PR middle-end/34070

40
gcc/config/mips/mips.c
View file

@ -4451,6 +4451,31 @@ mips_return_mode_in_fpr_p (enum machine_mode mode)
&& GET_MODE_UNIT_SIZE (mode) <= UNITS_PER_HWFPVALUE);
}
/* Return the representation of an FPR return register when the
value being returned in FP_RETURN has mode VALUE_MODE and the
return type itself has mode TYPE_MODE. On NewABI targets,
the two modes may be different for structures like:
struct __attribute__((packed)) foo { float f; }
where we return the SFmode value of "f" in FP_RETURN, but where
the structure itself has mode BLKmode. */
static rtx
mips_return_fpr_single (enum machine_mode type_mode,
enum machine_mode value_mode)
{
rtx x;
x = gen_rtx_REG (value_mode, FP_RETURN);
if (type_mode != value_mode)
{
x = gen_rtx_EXPR_LIST (VOIDmode, x, const0_rtx);
x = gen_rtx_PARALLEL (type_mode, gen_rtvec (1, x));
}
return x;
}
/* Return a composite value in a pair of floating-point registers.
MODE1 and OFFSET1 are the mode and byte offset for the first value,
likewise MODE2 and OFFSET2 for the second. MODE is the mode of the
@ -4502,7 +4527,8 @@ mips_function_value (const_tree valtype, enum machine_mode mode)
switch (mips_fpr_return_fields (valtype, fields))
{
case 1:
return gen_rtx_REG (mode, FP_RETURN);
return mips_return_fpr_single (mode,
TYPE_MODE (TREE_TYPE (fields[0])));
case 2:
return mips_return_fpr_pair (mode,
@ -5536,6 +5562,7 @@ mips_expand_call (rtx result, rtx addr, rtx args_size, rtx aux, bool sibcall_p)
: gen_call_internal (addr, args_size));
else if (GET_CODE (result) == PARALLEL && XVECLEN (result, 0) == 2)
{
/* Handle return values created by mips_return_fpr_pair. */
rtx reg1, reg2;
reg1 = XEXP (XVECEXP (result, 0, 0), 0);
@ -5546,9 +5573,14 @@ mips_expand_call (rtx result, rtx addr, rtx args_size, rtx aux, bool sibcall_p)
: gen_call_value_multiple_internal (reg1, addr, args_size, reg2));
}
else
pattern = (sibcall_p
? gen_sibcall_value_internal (result, addr, args_size)
: gen_call_value_internal (result, addr, args_size));
{
/* Handle return values created by mips_return_fpr_single. */
if (GET_CODE (result) == PARALLEL && XVECLEN (result, 0) == 1)
result = XEXP (XVECEXP (result, 0, 0), 0);
pattern = (sibcall_p
? gen_sibcall_value_internal (result, addr, args_size)
: gen_call_value_internal (result, addr, args_size));
}
insn = emit_call_insn (pattern);