public inbox for gcc-cvs@sourceware.org help / color / mirror / Atom feed
From: Kito Cheng <kito@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r14-86] RISC-V: Align IOR optimization MODE_CLASS condition to AND. Date: Wed, 19 Apr 2023 15:18:50 +0000 (GMT) [thread overview] Message-ID: <20230419151850.B81463857732@sourceware.org> (raw) https://gcc.gnu.org/g:978e8f02e8edebaf21ce32768cce603f650459e4 commit r14-86-g978e8f02e8edebaf21ce32768cce603f650459e4 Author: Pan Li <pan2.li@intel.com> Date: Wed Apr 19 17:18:20 2023 +0800 RISC-V: Align IOR optimization MODE_CLASS condition to AND. This patch aligned the MODE_CLASS condition of the IOR to the AND. Then more MODE_CLASS besides SCALAR_INT can able to perform the optimization A | (~A) -> -1 similar to AND operator. For example as below sample code. vbool32_t test_shortcut_for_riscv_vmorn_case_5(vbool32_t v1, size_t vl) { return __riscv_vmorn_mm_b32(v1, v1, vl); } Before this patch: vsetvli a5,zero,e8,mf4,ta,ma vlm.v v24,0(a1) vsetvli zero,a2,e8,mf4,ta,ma vmorn.mm v24,v24,v24 vsetvli a5,zero,e8,mf4,ta,ma vsm.v v24,0(a0) ret After this patch: vsetvli zero,a2,e8,mf4,ta,ma vmset.m v24 vsetvli a5,zero,e8,mf4,ta,ma vsm.v v24,0(a0) ret Or in RTL's perspective, from: (ior:VNx2BI (reg/v:VNx2BI 137 [ v1 ]) (not:VNx2BI (reg/v:VNx2BI 137 [ v1 ]))) to: (const_vector:VNx2BI repeat [ (const_int 1 [0x1]) ]) The similar optimization like VMANDN has enabled already. There should be no difference execpt the operator when compare the VMORN and VMANDN for such kind of optimization. The patch aligns the IOR MODE_CLASS condition of the simplification to the AND operator. gcc/ChangeLog: * simplify-rtx.cc (simplify_context::simplify_binary_operation_1): Align IOR (A | (~A) -> -1) optimization MODE_CLASS condition to AND. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/base/mask_insn_shortcut.c: Update check condition. * gcc.target/riscv/simplify_ior_optimization.c: New test. Signed-off-by: Pan Li <pan2.li@intel.com> Diff: --- gcc/simplify-rtx.cc | 4 +- .../gcc.target/riscv/rvv/base/mask_insn_shortcut.c | 3 +- .../gcc.target/riscv/simplify_ior_optimization.c | 50 ++++++++++++++++++++++ 3 files changed, 53 insertions(+), 4 deletions(-) diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc index c57ff3320ee..d4aeebc7a5f 100644 --- a/gcc/simplify-rtx.cc +++ b/gcc/simplify-rtx.cc @@ -3370,8 +3370,8 @@ simplify_context::simplify_binary_operation_1 (rtx_code code, if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1)) || (GET_CODE (op1) == NOT && rtx_equal_p (XEXP (op1, 0), op0))) && ! side_effects_p (op0) - && SCALAR_INT_MODE_P (mode)) - return constm1_rtx; + && GET_MODE_CLASS (mode) != MODE_CC) + return CONSTM1_RTX (mode); /* (ior A C) is C if all bits of A that might be nonzero are on in C. */ if (CONST_INT_P (op1) diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/mask_insn_shortcut.c b/gcc/testsuite/gcc.target/riscv/rvv/base/mask_insn_shortcut.c index 83cc4a1b5a5..57d0241675a 100644 --- a/gcc/testsuite/gcc.target/riscv/rvv/base/mask_insn_shortcut.c +++ b/gcc/testsuite/gcc.target/riscv/rvv/base/mask_insn_shortcut.c @@ -233,9 +233,8 @@ vbool64_t test_shortcut_for_riscv_vmxnor_case_6(vbool64_t v1, size_t vl) { /* { dg-final { scan-assembler-not {vmxor\.mm\s+v[0-9]+,\s*v[0-9]+} } } */ /* { dg-final { scan-assembler-not {vmor\.mm\s+v[0-9]+,\s*v[0-9]+} } } */ /* { dg-final { scan-assembler-not {vmnor\.mm\s+v[0-9]+,\s*v[0-9]+} } } */ -/* { dg-final { scan-assembler-times {vmorn\.mm\s+v[0-9]+,\s*v[0-9]+,\s*v[0-9]+} 7 } } */ /* { dg-final { scan-assembler-not {vmxnor\.mm\s+v[0-9]+,\s*v[0-9]+} } } */ /* { dg-final { scan-assembler-times {vmclr\.m\s+v[0-9]+} 14 } } */ -/* { dg-final { scan-assembler-times {vmset\.m\s+v[0-9]+} 7 } } */ +/* { dg-final { scan-assembler-times {vmset\.m\s+v[0-9]+} 14 } } */ /* { dg-final { scan-assembler-times {vmmv\.m\s+v[0-9]+,\s*v[0-9]+} 14 } } */ /* { dg-final { scan-assembler-times {vmnot\.m\s+v[0-9]+,\s*v[0-9]+} 14 } } */ diff --git a/gcc/testsuite/gcc.target/riscv/simplify_ior_optimization.c b/gcc/testsuite/gcc.target/riscv/simplify_ior_optimization.c new file mode 100644 index 00000000000..ec3bd0baf03 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/simplify_ior_optimization.c @@ -0,0 +1,50 @@ +/* { dg-do compile } */ +/* { dg-options "-march=rv64gc -mabi=lp64 -O2" } */ + +#include <stdint.h> + +uint8_t test_simplify_ior_scalar_case_0 (uint8_t a) +{ + return a | ~a; +} + +uint16_t test_simplify_ior_scalar_case_1 (uint16_t a) +{ + return a | ~a; +} + +uint32_t test_simplify_ior_scalar_case_2 (uint32_t a) +{ + return a | ~a; +} + +uint64_t test_simplify_ior_scalar_case_3 (uint64_t a) +{ + return a | ~a; +} + +int8_t test_simplify_ior_scalar_case_4 (int8_t a) +{ + return a | ~a; +} + +int16_t test_simplify_ior_scalar_case_5 (int16_t a) +{ + return a | ~a; +} + +int32_t test_simplify_ior_scalar_case_6 (int32_t a) +{ + return a | ~a; +} + +int64_t test_simplify_ior_scalar_case_7 (int64_t a) +{ + return a | ~a; +} + +/* { dg-final { scan-assembler-times {li\s+a[0-9]+,\s*-1} 6 } } */ +/* { dg-final { scan-assembler-times {li\s+a[0-9]+,\s*255} 1 } } */ +/* { dg-final { scan-assembler-times {li\s+a[0-9]+,\s*65536} 1 } } */ +/* { dg-final { scan-assembler-not {or\s+a[0-9]+} } } */ +/* { dg-final { scan-assembler-not {not\s+a[0-9]+} } } */
reply other threads:[~2023-04-19 15:18 UTC|newest] Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20230419151850.B81463857732@sourceware.org \ --to=kito@gcc.gnu.org \ --cc=gcc-cvs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).