[PATCH] x86: performance improvements at the beginning of functions

[Arthur Huillet]

introduce freg: EXPR_LOCAL and stmt_store: STMT_STORE(EXPR_TEMPORARY, 
EXPR_LOCAL)

Signed-off-by: Arthur Huillet <arthur.huil...@free.fr>
---
 arch/x86/insn-selector_32.brg |   44 +++++++++++++++++++++++++++++++++++++++-
 1 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/arch/x86/insn-selector_32.brg b/arch/x86/insn-selector_32.brg
index 4124181..cca84f2 100644
--- a/arch/x86/insn-selector_32.brg
+++ b/arch/x86/insn-selector_32.brg
@@ -224,7 +224,23 @@ reg:       EXPR_LOCAL      1
        }
 }
 
-reg:   EXPR_TEMPORARY
+freg:  EXPR_LOCAL 0
+{
+       struct compilation_unit *cu = s->b_parent;
+       struct expression *expr;
+       struct stack_slot *slot;
+       struct var_info *result;
+
+       expr = to_expr(tree);
+       slot = get_local_slot(cu->stack_frame, expr->local_index);
+
+       result = get_fpu_var(s->b_parent);
+       state->reg1 = result;
+
+       select_insn(s, tree, memlocal_reg_insn(INSN_MOV_MEMLOCAL_FREG, slot, 
result));
+}
+
+reg:   EXPR_TEMPORARY 0
 {
        struct expression *expr;
 
@@ -1399,7 +1415,31 @@ stmt:    STMT_STORE(EXPR_LOCAL, reg)
        }
 }
 
-stmt:  STMT_STORE(EXPR_TEMPORARY, reg)
+stmt:  STMT_STORE(EXPR_TEMPORARY, EXPR_LOCAL) 1
+{
+       struct expression *exprdest, *exprsrc;
+       struct var_info *src, *dest;
+       struct statement *stmt;
+       struct stack_slot *slot;
+
+       stmt = to_stmt(tree);
+
+       exprsrc = to_expr(stmt->store_src);
+       exprdest = to_expr(stmt->store_dest);
+       
+       slot = get_local_slot(s->b_parent->stack_frame, exprsrc->local_index);
+
+       dest = exprdest->tmp_low;
+
+       select_insn(s, tree, memlocal_reg_insn(INSN_MOV_MEMLOCAL_REG, slot, 
dest));
+       if (exprsrc->vm_type == J_LONG) {
+               slot = get_local_slot(s->b_parent->stack_frame, 
exprsrc->local_index + 1);
+               select_insn(s, tree, memlocal_reg_insn(INSN_MOV_MEMLOCAL_REG, 
slot, exprdest->tmp_high));
+       }       
+
+}
+
+stmt:  STMT_STORE(EXPR_TEMPORARY, reg) 1
 {
        struct expression *temp;
        struct var_info *src, *dest;
-- 
1.6.3.3



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