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| author | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2020-10-18 19:53:49 +0200 |
|---|---|---|
| committer | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2020-10-20 08:35:15 +0200 |
| commit | bc252d990312274418de69ef2b3a829e03542ac5 (patch) | |
| tree | 6c1135eb36678af001fe50b58e13fff86da24479 /gcc/config | |
| parent | 970d683f67777319990b30302a21a860990e2ec8 (diff) | |
| download | gcc-bc252d990312274418de69ef2b3a829e03542ac5.zip gcc-bc252d990312274418de69ef2b3a829e03542ac5.tar.gz gcc-bc252d990312274418de69ef2b3a829e03542ac5.tar.bz2 | |
IBM Z: Emit vector alignment hints for strlen
In case the vectorized version of strlen is used, then each memory
access inside the loop is 16-byte aligned. Thus add this kind of
information so that vector alignment hints can later on be emitted.
gcc/ChangeLog:
* config/s390/s390.c (s390_expand_vec_strlen): Add alignment
for memory access inside loop.
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/s390/s390.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index dbb541b..f9b27f9 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -5955,6 +5955,7 @@ s390_expand_vec_strlen (rtx target, rtx string, rtx alignment) rtx temp; rtx len = gen_reg_rtx (QImode); rtx cond; + rtx mem; s390_load_address (str_addr_base_reg, XEXP (string, 0)); emit_move_insn (str_idx_reg, const0_rtx); @@ -5996,10 +5997,10 @@ s390_expand_vec_strlen (rtx target, rtx string, rtx alignment) LABEL_NUSES (loop_start_label) = 1; /* Load 16 bytes of the string into VR. */ - emit_move_insn (str_reg, - gen_rtx_MEM (V16QImode, - gen_rtx_PLUS (Pmode, str_idx_reg, - str_addr_base_reg))); + mem = gen_rtx_MEM (V16QImode, + gen_rtx_PLUS (Pmode, str_idx_reg, str_addr_base_reg)); + set_mem_align (mem, 128); + emit_move_insn (str_reg, mem); if (into_loop_label != NULL_RTX) { emit_label (into_loop_label); |