diff options
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 56 |
1 files changed, 47 insertions, 9 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 9a5db43bc8e..ebe0a52e7d9 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -3077,6 +3077,37 @@ prev_cc0_setter (rtx insn) } #endif +#ifdef AUTO_INC_DEC +/* Find a RTX_AUTOINC class rtx which matches DATA. */ + +static int +find_auto_inc (rtx *xp, void *data) +{ + rtx x = *xp; + rtx reg = data; + + if (GET_RTX_CLASS (GET_CODE (x)) != RTX_AUTOINC) + return 0; + + switch (GET_CODE (x)) + { + case PRE_DEC: + case PRE_INC: + case POST_DEC: + case POST_INC: + case PRE_MODIFY: + case POST_MODIFY: + if (rtx_equal_p (reg, XEXP (x, 0))) + return 1; + break; + + default: + gcc_unreachable (); + } + return -1; +} +#endif + /* Increment the label uses for all labels present in rtx. */ static void @@ -3201,8 +3232,7 @@ try_split (rtx pat, rtx trial, int last) switch (REG_NOTE_KIND (note)) { case REG_EH_REGION: - insn = insn_last; - while (insn != NULL_RTX) + for (insn = insn_last; insn != NULL_RTX; insn = PREV_INSN (insn)) { if (CALL_P (insn) || (flag_non_call_exceptions && INSN_P (insn) @@ -3211,37 +3241,45 @@ try_split (rtx pat, rtx trial, int last) = gen_rtx_EXPR_LIST (REG_EH_REGION, XEXP (note, 0), REG_NOTES (insn)); - insn = PREV_INSN (insn); } break; case REG_NORETURN: case REG_SETJMP: - insn = insn_last; - while (insn != NULL_RTX) + for (insn = insn_last; insn != NULL_RTX; insn = PREV_INSN (insn)) { if (CALL_P (insn)) REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_NOTE_KIND (note), XEXP (note, 0), REG_NOTES (insn)); - insn = PREV_INSN (insn); } break; case REG_NON_LOCAL_GOTO: - insn = insn_last; - while (insn != NULL_RTX) + for (insn = insn_last; insn != NULL_RTX; insn = PREV_INSN (insn)) { if (JUMP_P (insn)) REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_NOTE_KIND (note), XEXP (note, 0), REG_NOTES (insn)); - insn = PREV_INSN (insn); } break; +#ifdef AUTO_INC_DEC + case REG_INC: + for (insn = insn_last; insn != NULL_RTX; insn = PREV_INSN (insn)) + { + rtx reg = XEXP (note, 0); + if (!FIND_REG_INC_NOTE (insn, reg) + && for_each_rtx (&PATTERN (insn), find_auto_inc, reg) > 0) + REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_INC, reg, + REG_NOTES (insn)); + } + break; +#endif + default: break; } |