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re PR rtl-optimization/34959 (23_containers/bitset/ext/15361.cc fails for MIPS n64)

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gcc/
	PR rtl-optimization/34959
	* optabs.c (expand_unop): In libcall notes, give ffs, clz, ctz,
	popcount and parity rtxes the same mode as their operand.
	Truncate or extend the result to the return value's mode
	if necessary.

From-SVN: r131863
This commit is contained in:
Richard Sandiford 2008-01-26 11:34:41 +00:00 committed by Richard Sandiford
parent 2f35df8c14
commit 1230d7f8de
2 changed files with 15 additions and 2 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2008-01-26 Richard Sandiford <rsandifo@nildram.co.uk>
PR rtl-optimization/34959
* optabs.c (expand_unop): In libcall notes, give ffs, clz, ctz,
popcount and parity rtxes the same mode as their operand.
Truncate or extend the result to the return value's mode
if necessary.
2008-01-26 Richard Sandiford <rsandifo@nildram.co.uk>
PR target/34981

9
gcc/optabs.c
View File

@ -3273,6 +3273,7 @@ expand_unop (enum machine_mode mode, optab unoptab, rtx op0, rtx target,
{
rtx insns;
rtx value;
rtx eq_value;
enum machine_mode outmode = mode;
/* All of these functions return small values. Thus we choose to
@ -3292,8 +3293,12 @@ expand_unop (enum machine_mode mode, optab unoptab, rtx op0, rtx target,
end_sequence ();
target = gen_reg_rtx (outmode);
emit_libcall_block (insns, target, value,
gen_rtx_fmt_e (unoptab->code, outmode, op0));
eq_value = gen_rtx_fmt_e (unoptab->code, mode, op0);
if (GET_MODE_SIZE (outmode) < GET_MODE_SIZE (mode))
eq_value = simplify_gen_unary (TRUNCATE, outmode, eq_value, mode);
else if (GET_MODE_SIZE (outmode) > GET_MODE_SIZE (mode))
eq_value = simplify_gen_unary (ZERO_EXTEND, outmode, eq_value, mode);
emit_libcall_block (insns, target, value, eq_value);
return target;
}