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| author | Uros Bizjak <ubizjak@gmail.com> | 2016-04-29 16:43:29 +0200 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2016-04-29 16:43:29 +0200 |
| commit | febaf72616a01e0bd74dc6c473912f6868118de7 (patch) | |
| tree | f5f9351509e1f841f68535bbe134674b25eb9829 | |
| parent | b891ade601b742d159a4a566e89321317bfe8975 (diff) | |
| download | gcc-febaf72616a01e0bd74dc6c473912f6868118de7.zip gcc-febaf72616a01e0bd74dc6c473912f6868118de7.tar.gz gcc-febaf72616a01e0bd74dc6c473912f6868118de7.tar.bz2 | |
i386.md (unspec): Add UNSPEC_PROBE_STACK.
* config/i386/i386.md (unspec): Add UNSPEC_PROBE_STACK.
(probe_stack): New expander.
(probe_stack_<mode>): New insn pattern.
From-SVN: r235642
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/i386/i386.md | 25 |
2 files changed, 31 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 86523e0..01f2580 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2016-04-29 Uros Bizjak <ubizjak@gmail.com> + * config/i386/i386.md (unspec): Add UNSPEC_PROBE_STACK. + (probe_stack): New expander. + (probe_stack_<mode>): New insn pattern. + +2016-04-29 Uros Bizjak <ubizjak@gmail.com> + * config/i386/i386.md (operations with memory inputs setting flags peephole2): Remove uneeded REG_P checks. Cleanup pattern generation. diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 217551b..a0343d9 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -88,6 +88,7 @@ UNSPEC_SET_GOT_OFFSET UNSPEC_MEMORY_BLOCKAGE UNSPEC_STACK_CHECK + UNSPEC_PROBE_STACK ;; TLS support UNSPEC_TP @@ -17552,6 +17553,30 @@ DONE; }) +(define_expand "probe_stack" + [(match_operand 0 "memory_operand")] + "" +{ + rtx (*insn) (rtx, rtx) + = (GET_MODE (operands[0]) == DImode + ? gen_probe_stack_di : gen_probe_stack_si); + + emit_insn (insn (operands[0], const0_rtx)); + DONE; +}) + +;; Use OR for stack probes, this is shorter. +(define_insn "probe_stack_<mode>" + [(set (match_operand:W 0 "memory_operand" "=m") + (unspec:W [(match_operand:W 1 "const0_operand")] + UNSPEC_PROBE_STACK)) + (clobber (reg:CC FLAGS_REG))] + "" + "or{<imodesuffix>}\t{%1, %0|%0, %1}" + [(set_attr "type" "alu1") + (set_attr "mode" "<MODE>") + (set_attr "length_immediate" "1")]) + (define_insn "adjust_stack_and_probe<mode>" [(set (match_operand:P 0 "register_operand" "=r") (unspec_volatile:P [(match_operand:P 1 "register_operand" "0")] |