CVS commit: src/external/gpl3/gcc.old/dist/gcc

["Rin Okuyama" <rin%netbsd.org@localhost>]

Module Name:    src
Committed By:   rin
Date:           Sat Oct  7 12:05:36 UTC 2023

Modified Files:
        src/external/gpl3/gcc.old/dist/gcc: rtlanal.c target.def targhooks.c
            targhooks.h
        src/external/gpl3/gcc.old/dist/gcc/config/vax: vax.c
        src/external/gpl3/gcc.old/dist/gcc/doc: tm.texi tm.texi.in

Log Message:
gcc.old: PR port-vax/57646 patch provided by Kalvis Duckmanton [13/21]

Bitfield instructions will generate a reserved operand fault if the
operands are not reasonable (size > 32, position > 31 and size not
zero and field in a register). GCC generates code to test for these
conditions but in certain circumstances, the optimiser may decide
that a bitfield extraction instruction is invariant and move it
ahead of the instructions testing its arguments.

Introduce a new target hook to indicate to GCC that a bitfield
instruction may trap and update may_trap_p_1()

XXXRO: Although this patch includes diffs outside gcc/config/vax,
NFC for !TARGET_BITFIELD_MAY_TRAP_P, i.e., other than vax.


To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/external/gpl3/gcc.old/dist/gcc/rtlanal.c
cvs rdiff -u -r1.9 -r1.10 src/external/gpl3/gcc.old/dist/gcc/target.def
cvs rdiff -u -r1.11 -r1.12 src/external/gpl3/gcc.old/dist/gcc/targhooks.c \
    src/external/gpl3/gcc.old/dist/gcc/targhooks.h
cvs rdiff -u -r1.16 -r1.17 \
    src/external/gpl3/gcc.old/dist/gcc/config/vax/vax.c
cvs rdiff -u -r1.11 -r1.12 src/external/gpl3/gcc.old/dist/gcc/doc/tm.texi
cvs rdiff -u -r1.9 -r1.10 src/external/gpl3/gcc.old/dist/gcc/doc/tm.texi.in

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.