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Volatile memory can be used as source operand for any operations. Add
-ffuse-ops-with-volatile-access to fuse operations with volatile memory
reference and update simplify_binary_operation_1 to keep PLUS for 2
volatile memory references. On x86, this optimizes
extern volatile int bar;
int
foo (int z)
{
z *= 123;
return bar + z;
}
into
foo:
imull $123, %edi, %eax
addl bar(%rip), %eax
ret
and compile
extern volatile unsigned char u8;
void
test (void)
{
u8 = u8 + u8;
u8 = u8 - u8;
}
into
test:
movzbl u8(%rip), %eax
addb %al, u8(%rip)
movzbl u8(%rip), %eax
subb u8(%rip), %al
movb %al, u8(%rip)
ret
Tested with Linux kernel 6.17.9 on Intel Core i7-1195G7.
gcc/
PR target/122343
* common.opt: Add -ffuse-ops-with-volatile-access.
* common.opt.urls: Regenerated.
* recog.cc (general_operand): Allow volatile memory reference if
-ffuse-ops-with-volatile-access is enabled.
* simplify-rtx.cc (simplify_binary_operation_1): Keep PLUS for 2
volatile memory references.
* doc/invoke.texi: Document -ffuse-ops-with-volatile-access.
gcc/testsuite/
PR target/122343
* gcc.target/i386/20040112-1.c: Add -fomit-frame-pointer and use
check-function-bodies to check for loop.
* gcc.target/i386/avx-ne-convert-1.c: Compile with
-fno-fuse-ops-with-volatile-access.
* gcc.target/i386/avx10_2-bf16-1.c: Likewise.
* gcc.target/i386/avx10_2-convert-1.c: Likewise.
* gcc.target/i386/avx10_2-satcvt-1.c: Likewise.
* gcc.target/i386/avx512bf16-vcvtneps2bf16-1.c: Likewise.
* gcc.target/i386/avx512bf16vl-vcvtneps2bf16-1a.c: Likewise.
* gcc.target/i386/avx512bf16vl-vcvtneps2bf16-1b.c: Likewise.
* gcc.target/i386/avx512bitalg-vpshufbitqmb.c: Likewise.
* gcc.target/i386/avx512bw-vpcmpb-1.c: Likewise.
* gcc.target/i386/avx512bw-vpcmpub-1.c: Likewise.
* gcc.target/i386/avx512bw-vpcmpuw-1.c: Likewise.
* gcc.target/i386/avx512bw-vpcmpw-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvtps2qq-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvtps2uqq-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvtqq2pd-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvtqq2ps-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvttps2qq-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvttps2uqq-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvtuqq2pd-1.c: Likewise.
* gcc.target/i386/avx512dq-vcvtuqq2ps-1.c: Likewise.
* gcc.target/i386/avx512dq-vextractf32x8-1.c: Likewise.
* gcc.target/i386/avx512dq-vextractf64x2-1.c: Likewise.
* gcc.target/i386/avx512dq-vextracti64x2-1.c: Likewise.
* gcc.target/i386/avx512dq-vfpclasspd-1.c: Likewise.
* gcc.target/i386/avx512dq-vfpclassps-1.c: Likewise.
* gcc.target/i386/avx512dq-vfpclasssd-1.c: Likewise.
* gcc.target/i386/avx512dq-vfpclassss-1.c: Likewise.
* gcc.target/i386/avx512dq-vpmullq-1.c: Likewise.
* gcc.target/i386/avx512dq-vpmullq-3.c: Likewise.
* gcc.target/i386/avx512f-pr100267-1.c: Likewise.
* gcc.target/i386/avx512f-vcmppd-1.c: Likewise.
* gcc.target/i386/avx512f-vcmpps-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtps2pd-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtsd2si-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtsd2si64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtsd2usi-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtsd2usi64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtsi2ss-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtss2si-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtss2si64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtss2usi-1.c: Likewise.
* gcc.target/i386/avx512f-vcvtss2usi64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttsd2si-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttsd2si64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttsd2usi-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttsd2usi64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttss2si-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttss2si64-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttss2usi-1.c: Likewise.
* gcc.target/i386/avx512f-vcvttss2usi64-1.c: Likewise.
* gcc.target/i386/avx512f-vextractf32x4-1.c: Likewise.
* gcc.target/i386/avx512f-vextractf64x4-1.c: Likewise.
* gcc.target/i386/avx512f-vextracti64x4-1.c: Likewise.
* gcc.target/i386/avx512f-vmovapd-1.c: Likewise.
* gcc.target/i386/avx512f-vmovaps-1.c: Likewise.
* gcc.target/i386/avx512f-vmovdqa64-1.c: Likewise.
* gcc.target/i386/avx512f-vpandnq-1.c: Likewise.
* gcc.target/i386/avx512f-vpbroadcastd-1.c: Likewise.
* gcc.target/i386/avx512f-vpbroadcastq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpd-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpeqq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpequq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpged-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpgeq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpgeud-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpgeuq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpled-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpleq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpleud-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpleuq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpltd-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpltq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpltud-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpltuq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpneqd-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpneqq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpnequd-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpnequq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpq-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpud-1.c: Likewise.
* gcc.target/i386/avx512f-vpcmpuq-1.c: Likewise.
* gcc.target/i386/avx512f-vrndscalepd-1.c: Likewise.
* gcc.target/i386/avx512f-vrndscaleps-1.c: Likewise.
* gcc.target/i386/avx512fp16-complex-fma.c: Likewise.
* gcc.target/i386/avx512fp16-vaddph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtpd2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2dq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2pd-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2psx-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2qq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2udq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2uqq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2uw-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtph2w-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtps2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtqq2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvttph2dq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvttph2qq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvttph2udq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvttph2uqq-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvttph2uw-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvttph2w-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vcvtuqq2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vfcmaddcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vfcmulcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vfmaddcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vfmulcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vfpclassph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vfpclasssh-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vmulph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vrcpph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vrsqrtph-1a.c: Likewise.
* gcc.target/i386/avx512fp16-vsqrtph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vaddph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtpd2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2dq-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2psx-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2qq-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2udq-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2uqq-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2uw-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtph2w-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtps2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtqq2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvttph2dq-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvttph2udq-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvttph2uw-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvttph2w-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vcvtuqq2ph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vfcmaddcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vfcmulcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vfmaddcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vfmulcph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vfpclassph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vmulph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vrcpph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vrsqrtph-1a.c: Likewise.
* gcc.target/i386/avx512fp16vl-vsqrtph-1a.c: Likewise.
* gcc.target/i386/avx512vl-pr100267-1.c: Likewise.
* gcc.target/i386/avx512vl-vcmppd-1.c: Likewise.
* gcc.target/i386/avx512vl-vcmpps-1.c: Likewise.
* gcc.target/i386/avx512vl-vcvtpd2ps-1.c: Likewise.
* gcc.target/i386/avx512vl-vcvtpd2udq-1.c: Likewise.
* gcc.target/i386/avx512vl-vcvttpd2udq-1.c: Likewise.
* gcc.target/i386/avx512vl-vcvttps2udq-1.c: Likewise.
* gcc.target/i386/avx512vl-vextractf32x4-1.c: Likewise.
* gcc.target/i386/avx512vl-vmovapd-1.c: Likewise.
* gcc.target/i386/avx512vl-vmovaps-1.c: Likewise.
* gcc.target/i386/avx512vl-vmovdqa64-1.c: Likewise.
* gcc.target/i386/avx512vl-vpcmpd-1.c: Likewise.
* gcc.target/i386/avx512vl-vpcmpeqq-1.c: Likewise.
* gcc.target/i386/avx512vl-vpcmpequq-1.c: Likewise.
* gcc.target/i386/avx512vl-vpcmpq-1.c: Likewise.
* gcc.target/i386/avx512vl-vpcmpud-1.c: Likewise.
* gcc.target/i386/avx512vl-vpcmpuq-1.c: Likewise.
* gcc.target/i386/pr122343-1a.c: New test.
* gcc.target/i386/pr122343-1b.c: Likewise.
* gcc.target/i386/pr122343-2a.c: Likewise.
* gcc.target/i386/pr122343-2b.c: Likewise.
* gcc.target/i386/pr122343-3.c: Likewise.
* gcc.target/i386/pr122343-4a.c: Likewise.
* gcc.target/i386/pr122343-4b.c: Likewise.
* gcc.target/i386/pr122343-5a.c: Likewise.
* gcc.target/i386/pr122343-5b.c: Likewise.
* gcc.target/i386/pr122343-6a.c: Likewise.
* gcc.target/i386/pr122343-6b.c: Likewise.
* gcc.target/i386/pr122343-7.c: Likewise.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.