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Re: port-macppc/54827: alloca() is broken in gcc 8 on powerpc
The following reply was made to PR port-macppc/54827; it has been noted by GNATS.
From: Valery Ushakov <uwe%stderr.spb.ru@localhost>
Cc: matthew green <mrg%eterna.com.au@localhost>
Subject: Re: port-macppc/54827: alloca() is broken in gcc 8 on powerpc
Date: Sun, 19 Jan 2020 18:32:32 +0300
That doesn't seem to help.
save_align = (TARGET_ALTIVEC_ABI || DEFAULT_ABI == ABI_DARWIN) ? 16 : 8;
#else /* XXX: uwe: fancy way to say 16 */
save_align = STACK_BOUNDARY / BITS_PER_UNIT;
The output for -mno-altivec -O2 allocates larger stack frame:
- stwu %r1,-48(%r1)
+ stwu %r1,-64(%r1)
(plus corresponding changes down the code), but the rest is the same.
Testing its output shows the bug is still there, it just happens 16
$ cc -g -O0 main.c out-nx-no2.s && ./a.out
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