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author | Jakub Jelinek <jakub@redhat.com> | 2022-04-19 18:58:59 +0200 |
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committer | Jakub Jelinek <jakub@redhat.com> | 2022-04-19 18:58:59 +0200 |
commit | eeca2b8bd03f57c59c6cf48bf6b9bd6dc86924f6 (patch) | |
tree | ccc98793e6bc5039fe7df862c95a90f5d25eba58 | |
parent | eb03e424598d30fed68801af6d6ef6236d32e32e (diff) | |
download | gcc-eeca2b8bd03f57c59c6cf48bf6b9bd6dc86924f6.zip gcc-eeca2b8bd03f57c59c6cf48bf6b9bd6dc86924f6.tar.gz gcc-eeca2b8bd03f57c59c6cf48bf6b9bd6dc86924f6.tar.bz2 |
sparc: Preserve ORIGINAL_REGNO in epilogue_renumber [PR105257]
The following testcase ICEs, because the pic register is
(reg:DI 24 %i0 [109]) and is used in the delay slot of a return.
We invoke epilogue_renumber and that changes it to
(reg:DI 8 %o0) which no longer satisfies sparc_pic_register_p
predicate, so we don't recognize the insn anymore.
The following patch fixes that by preserving ORIGINAL_REGNO if
specified, so we get (reg:DI 8 %o0 [109]) instead.
2022-04-19 Jakub Jelinek <jakub@redhat.com>
PR target/105257
* config/sparc/sparc.cc (epilogue_renumber): If ORIGINAL_REGNO,
use gen_raw_REG instead of gen_rtx_REG and copy over also
ORIGINAL_REGNO. Use return 0; instead of /* fallthrough */.
* gcc.dg/pr105257.c: New test.
-rw-r--r-- | gcc/config/sparc/sparc.cc | 16 | ||||
-rw-r--r-- | gcc/testsuite/gcc.dg/pr105257.c | 16 |
2 files changed, 30 insertions, 2 deletions
diff --git a/gcc/config/sparc/sparc.cc b/gcc/config/sparc/sparc.cc index bb4ce88..467a9f1 100644 --- a/gcc/config/sparc/sparc.cc +++ b/gcc/config/sparc/sparc.cc @@ -8884,8 +8884,20 @@ epilogue_renumber (rtx *where, int test) if (REGNO (*where) >= 8 && REGNO (*where) < 24) /* oX or lX */ return 1; if (! test && REGNO (*where) >= 24 && REGNO (*where) < 32) - *where = gen_rtx_REG (GET_MODE (*where), OUTGOING_REGNO (REGNO(*where))); - /* fallthrough */ + { + if (ORIGINAL_REGNO (*where)) + { + rtx n = gen_raw_REG (GET_MODE (*where), + OUTGOING_REGNO (REGNO (*where))); + ORIGINAL_REGNO (n) = ORIGINAL_REGNO (*where); + *where = n; + } + else + *where = gen_rtx_REG (GET_MODE (*where), + OUTGOING_REGNO (REGNO (*where))); + } + return 0; + case SCRATCH: case PC: case CONST_INT: diff --git a/gcc/testsuite/gcc.dg/pr105257.c b/gcc/testsuite/gcc.dg/pr105257.c new file mode 100644 index 0000000..4232942 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr105257.c @@ -0,0 +1,16 @@ +/* PR target/105257 */ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ +/* { dg-additional-options "-fpic" { target fpic } } */ + +extern int sigsetjmp (void **, int); +void *buf[32]; +void (*fn) (void); + +const char * +bar (void) +{ + sigsetjmp (buf, 0); + fn (); + return ""; +} |