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| author | Jeffrey A Law <law@cygnus.com> | 2000-04-12 23:47:06 +0000 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-04-12 16:47:06 -0700 |
| commit | 4fa48eaefa5e78fbecb27a73d4f622ea238a3628 (patch) | |
| tree | 3e9531941b584cf074efa635b43ce94f684623ba | |
| parent | aea0083a2d142590d6468a02a03c0f5c43e75973 (diff) | |
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Jeffrey A Law (law@cygnus.com)
* function.c (purge_addressof): Unshare any shared rtl created by
purge_addressof and its children.
From-SVN: r33133
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/function.c | 14 |
2 files changed, 19 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3f69496..6131937 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2000-04-12 Jeffrey A Law (law@cygnus.com) + + * function.c (purge_addressof): Unshare any shared rtl created by + purge_addressof and its children. + 2000-04-12 Mark Mitchell <mark@codesourcery.com> * function.c (aggregate_value_p): VOID_TYPE nodes are never diff --git a/gcc/function.c b/gcc/function.c index f31e20d..4b6f5ff 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -3330,6 +3330,20 @@ purge_addressof (insns) hash_table_free (&ht); purge_bitfield_addressof_replacements = 0; purge_addressof_replacements = 0; + + /* REGs are shared. purge_addressof will destructively replace a REG + with a MEM, which creates shared MEMs. + + Unfortunately, the children of put_reg_into_stack assume that MEMs + referring to the same stack slot are shared (fixup_var_refs and + the associated hash table code). + + So, we have to do another unsharing pass after we have flushed any + REGs that had their address taken into the stack. + + It may be worth tracking whether or not we converted any REGs into + MEMs to avoid this overhead when it is not needed. */ + unshare_all_rtl_again (get_insns ()); } /* Pass through the INSNS of function FNDECL and convert virtual register |