[gcc r11-7578] [PR99454] LRA: Process 0..9 constraints in process_address_1

[gcc r11-7578] [PR99454] LRA: Process 0..9 constraints in process_address_1

[Vladimir Makarov]

https://gcc.gnu.org/g:9725df0233b6fb6e761875968b3b8e9fd9f522ac

commit r11-7578-g9725df0233b6fb6e761875968b3b8e9fd9f522ac
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Tue Mar 9 09:05:05 2021 -0500

    [PR99454] LRA: Process 0..9 constraints in process_address_1
    
    We need to process 0..9 constraints to fetch the right op constraint in
    the function.  Also 0..9 constraints gives unknown class constraint
    class which can result in skipping address normalization for memory in asm.
    
    gcc/ChangeLog:
    
            PR target/99454
            * lra-constraints.c (process_address_1): Process 0..9 constraints
            in process_address_1.

Diff:
---
 gcc/lra-constraints.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index 76e3ff7efe6..feff766c590 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -3452,6 +3452,10 @@ process_address_1 (int nop, bool check_only_p,
 
   constraint
     = skip_contraint_modifiers (curr_static_id->operand[nop].constraint);
+  if ('0' <= constraint[0] && constraint[0] <= '9')
+    constraint
+      = skip_contraint_modifiers (curr_static_id->operand
+				  [constraint[0] - '0'].constraint);
   cn = lookup_constraint (constraint);
   if (insn_extra_address_constraint (cn)
       /* When we find an asm operand with an address constraint that