diff options
Diffstat (limited to 'gcc/global.c')
| -rw-r--r-- | gcc/global.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/gcc/global.c b/gcc/global.c index f82cd08..d4e2b77 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -97,6 +97,9 @@ struct allocno /* Number of calls crossed by each allocno. */ int calls_crossed; + /* Number of calls that might throw crossed by each allocno. */ + int throwing_calls_crossed; + /* Number of refs to each allocno. */ int n_refs; @@ -465,9 +468,7 @@ global_alloc (FILE *file) /* Don't allocate pseudos that cross calls, if this function receives a nonlocal goto. */ && (! current_function_has_nonlocal_label - || REG_N_CALLS_CROSSED (i) == 0) - /* Don't allocate pseudos that cross calls that may throw. */ - && REG_N_THROWING_CALLS_CROSSED (i) == 0) + || REG_N_CALLS_CROSSED (i) == 0)) { if (reg_renumber[i] < 0 && reg_may_share[i] && reg_allocno[reg_may_share[i]] >= 0) @@ -488,6 +489,8 @@ global_alloc (FILE *file) allocno[num].reg = i; allocno[num].size = PSEUDO_REGNO_SIZE (i); allocno[num].calls_crossed += REG_N_CALLS_CROSSED (i); + allocno[num].throwing_calls_crossed + += REG_N_THROWING_CALLS_CROSSED (i); allocno[num].n_refs += REG_N_REFS (i); allocno[num].freq += REG_FREQ (i); if (allocno[num].live_length < REG_LIVE_LENGTH (i)) @@ -1207,9 +1210,11 @@ find_reg (int num, HARD_REG_SET losers, int alt_regs_p, int accept_call_clobbere { /* Did not find a register. If it would be profitable to allocate a call-clobbered register and save and restore it - around calls, do that. */ + around calls, do that. Don't do this if it crosses any calls + that might throw. */ if (! accept_call_clobbered && allocno[num].calls_crossed != 0 + && allocno[num].throwing_calls_crossed == 0 && CALLER_SAVE_PROFITABLE (allocno[num].n_refs, allocno[num].calls_crossed)) { |