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| author | Haochen Gui <guihaoc@gcc.gnu.org> | 2024-06-24 13:16:12 +0800 |
|---|---|---|
| committer | Haochen Gui <guihaoc@gcc.gnu.org> | 2024-06-24 13:17:27 +0800 |
| commit | 6274f10318d05311f31147c895f76a01aec37830 (patch) | |
| tree | b1ab26522584cb6049824b3dd350d6df1d69dca1 | |
| parent | ea8061f46a301797e7ba33b52e3b4713fb8e6b48 (diff) | |
| download | gcc-6274f10318d05311f31147c895f76a01aec37830.zip gcc-6274f10318d05311f31147c895f76a01aec37830.tar.gz gcc-6274f10318d05311f31147c895f76a01aec37830.tar.bz2 | |
rs6000: Eliminate unnecessary byte swaps for duplicated constant vector store
gcc/
PR target/113325
* config/rs6000/vsx.md (vsx_stxvd2x4_le_const_<mode>): New.
gcc/testsuite/
PR target/113325
* gcc.target/powerpc/pr113325.c: New.
| -rw-r--r-- | gcc/config/rs6000/vsx.md | 25 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/powerpc/pr113325.c | 9 |
2 files changed, 34 insertions, 0 deletions
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md index 7a9c19a..48ba262 100644 --- a/gcc/config/rs6000/vsx.md +++ b/gcc/config/rs6000/vsx.md @@ -3368,6 +3368,31 @@ "stxvd2x %x1,%y0" [(set_attr "type" "vecstore")]) +(define_insn_and_split "vsx_stxvd2x4_le_const_<mode>" + [(set (match_operand:VSX_W 0 "memory_operand" "=Z") + (match_operand:VSX_W 1 "immediate_operand" "W"))] + "!BYTES_BIG_ENDIAN + && VECTOR_MEM_VSX_P (<MODE>mode) + && !TARGET_P9_VECTOR + && const_vec_duplicate_p (operands[1]) + && can_create_pseudo_p ()" + "#" + "&& 1" + [(set (match_dup 2) + (match_dup 1)) + (set (match_dup 0) + (vec_select:VSX_W + (match_dup 2) + (parallel [(const_int 2) (const_int 3) + (const_int 0) (const_int 1)])))] +{ + /* Here all the constants must be loaded without memory. */ + gcc_assert (easy_altivec_constant (operands[1], <MODE>mode)); + operands[2] = gen_reg_rtx (<MODE>mode); +} + [(set_attr "type" "vecstore") + (set_attr "length" "8")]) + (define_insn "*vsx_stxvd2x8_le_V8HI" [(set (match_operand:V8HI 0 "memory_operand" "=Z") (vec_select:V8HI diff --git a/gcc/testsuite/gcc.target/powerpc/pr113325.c b/gcc/testsuite/gcc.target/powerpc/pr113325.c new file mode 100644 index 0000000..3ca1fcb --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr113325.c @@ -0,0 +1,9 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mdejagnu-cpu=power8 -mvsx" } */ +/* { dg-require-effective-target powerpc_vsx } */ +/* { dg-final { scan-assembler-not {\mxxpermdi\M} } } */ + +void* foo (void* s1) +{ + return __builtin_memset (s1, 0, 32); +} |