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re PR target/85666 (gcc-8.0.1 fails to build mmix target: gcc/libgcc/libgcc2.h:203:20: internal compiler error: in leaf_function_p, at final.c:4488)

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PR target/85666
	* config/mmix/mmix.c (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS): Don't
	call leaf_function_p, instead use has_hard_reg_initial_val.

From-SVN: r264182
This commit is contained in:
Hans-Peter Nilsson 2018-09-09 18:05:48 +00:00 committed by Hans-Peter Nilsson
parent b8106e8fd7
commit a236f9d640
2 changed files with 14 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-09-09 Hans-Peter Nilsson <hp@bitrange.com>
PR target/85666
* config/mmix/mmix.c (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS): Don't
call leaf_function_p, instead use has_hard_reg_initial_val.
2018-09-09 Nathan Sidwell <nathan@acm.org>
* gcc.h (pfatal_with_name): Don't declare here.

19
gcc/config/mmix/mmix.c
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@ -60,19 +60,16 @@ along with GCC; see the file COPYING3. If not see
/* We have no means to tell DWARF 2 about the register stack, so we need
to store the return address on the stack if an exception can get into
this function. FIXME: Narrow condition. Before any whole-function
analysis, df_regs_ever_live_p () isn't initialized. We know it's up-to-date
after reload_completed; it may contain incorrect information some time
before that. Within a RTL sequence (after a call to start_sequence,
such as in RTL expanders), leaf_function_p doesn't see all insns
(perhaps any insn). But regs_ever_live is up-to-date when
leaf_function_p () isn't, so we "or" them together to get accurate
information. FIXME: Some tweak to leaf_function_p might be
preferable. */
this function. We'll have an "initial value" recorded for the
return-register if we've seen a call instruction emitted. This note
will be inaccurate before instructions are emitted, but the only caller
at that time is looking for modulo from stack-boundary, to which the
return-address does not contribute, and which is always 0 for MMIX
anyway. Beware of calling leaf_function_p here, as it'll abort if
called within a sequence. */
#define MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS \
(flag_exceptions \
&& ((reload_completed && df_regs_ever_live_p (MMIX_rJ_REGNUM)) \
|| !leaf_function_p ()))
&& has_hard_reg_initial_val (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM))
#define IS_MMIX_EH_RETURN_DATA_REG(REGNO) \
(crtl->calls_eh_return \