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| author | segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-10-29 19:24:48 +0000 |
|---|---|---|
| committer | segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-10-29 19:24:48 +0000 |
| commit | 556c2dd1a3c70cc3d285539b84eea31143005a91 (patch) | |
| tree | fbc4bbbd9b64d127f2a42db6ce1e8d6038f2e6d1 | |
| parent | 88778476b39d1f17164d815031ff594d88dbf44e (diff) | |
| download | gcc-556c2dd1a3c70cc3d285539b84eea31143005a91.tar.gz | |
lra: Don't remove the scratch in (mem:BLK (scratch))
LRA wants to replace SCRATCH registers with real registers. It should
not do that with (mem:BLK (scratch)), which is special, not really a
scratch register.
2015-10-29 Segher Boessenkool <segher@kernel.crashing.org>
* lra-constraints.c (process_address_1): Handle (mem:BLK (scratch))
by ignoring it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@229551 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/lra-constraints.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fa3e95651de..75ba2e83d44 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-10-29 Segher Boessenkool <segher@kernel.crashing.org> + + * lra-constraints.c (process_address_1): Handle (mem:BLK (scratch)) + by ignoring it. + 2015-10-29 Richard Henderson <rth@redhat.com> PR target/68124 diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index 0f54b6c24ce..c2777e982a7 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -2874,6 +2874,11 @@ process_address_1 (int nop, bool check_only_p, enum constraint_num cn = lookup_constraint (constraint); bool change_p = false; + if (MEM_P (op) + && GET_MODE (op) == BLKmode + && GET_CODE (XEXP (op, 0)) == SCRATCH) + return false; + if (insn_extra_address_constraint (cn)) decompose_lea_address (&ad, curr_id->operand_loc[nop]); else if (MEM_P (op)) |