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| author | Jakub Jelinek <jakub@redhat.com> | 2023-04-25 14:20:51 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2023-04-25 14:37:16 +0200 |
| commit | fb4e50a7c1cdd14e8f06421c642837292c9d8dee (patch) | |
| tree | d707d605a837ac486f4cbbff809e7f5b75b64feb | |
| parent | 4fee426ce03e616a4db129edca30efa1267d1503 (diff) | |
| download | gcc-fb4e50a7c1cdd14e8f06421c642837292c9d8dee.tar.gz | |
powerpc: Fix up *branch_anddi3_dot for -m32 -mpowerpc64 [PR109566]
The following testcase reduced from newlib ICEs on powerpc-linux,
with -O2 -m32 -mpowerpc64 since r12-6433 PR102239 optimization was
added and on the original testcase since some ranger improvements in
GCC 13 made it no longer latent on newlib.
The problem is that the *branch_anddi3_dot define_insn_and_split
relies on the *rotldi3_mask_dot define_insn_and_split being recognized
during splitting. The rs6000_is_valid_rotate_dot_mask function checks whether
the mask is a CONST_INT which is a valid mask, but *rotl<mode>3_mask_dot in
addition to checking that it is a valid mask also has
(<MODE>mode == Pmode || UINTVAL (operands[3]) <= 0x7fffffff)
test in the condition. For TARGET_64BIT that doesn't add any further
requirements, but for !TARGET_64BIT && TARGET_POWERPC64 if the AND
second operand is larger than INT_MAX it will not be recognized.
The rs6000_is_valid_rotate_dot_mask function is used solely in one spot,
condition of *branch_anddi3_dot, so the following patch adjusts it
to check for that as well.
2023-04-25 Jakub Jelinek <jakub@redhat.com>
PR target/109566
* config/rs6000/rs6000.cc (rs6000_is_valid_rotate_dot_mask): For
!TARGET_64BIT, don't return true if UINTVAL (mask) << (63 - nb)
is larger than signed int maximum.
* gcc.target/powerpc/pr109566.c: New test.
(cherry picked from commit 97f8f2d0a0384d377ca46da88495f9a3d18d4415)
| -rw-r--r-- | gcc/config/rs6000/rs6000.cc | 11 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/powerpc/pr109566.c | 18 |
2 files changed, 28 insertions, 1 deletions
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index 3be5860dd9b..6debf0f63ff 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -11409,7 +11409,16 @@ bool rs6000_is_valid_rotate_dot_mask (rtx mask, machine_mode mode) { int nb, ne; - return rs6000_is_valid_mask (mask, &nb, &ne, mode) && nb >= ne && ne > 0; + if (rs6000_is_valid_mask (mask, &nb, &ne, mode) && nb >= ne && ne > 0) + { + if (TARGET_64BIT) + return true; + /* *rotldi3_mask_dot requires for -m32 -mpowerpc64 that the mask is + <= 0x7fffffff. */ + return (UINTVAL (mask) << (63 - nb)) <= 0x7fffffff; + } + + return false; } /* Return whether MASK (a CONST_INT) is a valid mask for any rlwinm, rldicl, diff --git a/gcc/testsuite/gcc.target/powerpc/pr109566.c b/gcc/testsuite/gcc.target/powerpc/pr109566.c new file mode 100644 index 00000000000..bfbf9224755 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr109566.c @@ -0,0 +1,18 @@ +/* PR target/109566 */ +/* Skip this on aix, otherwise it emits the error message like "64-bit + computation with 32-bit addressing not yet supported" on aix. */ +/* { dg-skip-if "" { powerpc*-*-aix* } } */ +/* { dg-do compile } */ +/* { dg-options "-O2 -mpowerpc64" } */ + +void +foo (double x) +{ + union { double d; unsigned i; } u; + u.d = x; + if (u.i & 0x7ff00000) + return; + else + for (;;) + ; +} |