Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20150727' int…

…o staging

Fix buglets for 2.4

# gpg: Signature made Mon Jul 27 15:26:48 2015 BST using RSA key ID 4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"

* remotes/rth/tags/pull-tcg-20150727:
  tcg: mark temps as mem_coherent = 0 for mov with a constant
  tcg: correctly mark dead inputs for mov with a constant

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

tcg/tcg.c

@@ -1894,6 +1894,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
             ts->mem_coherent = 1;
         } else if (ts->val_type == TEMP_VAL_CONST) {
             tcg_out_movi(s, itype, ts->reg, ts->val);
+            ts->mem_coherent = 0;
         }
         s->reg_to_temp[ts->reg] = args[1];
         ts->val_type = TEMP_VAL_REG;
@@ -1920,6 +1921,9 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
         }
         ots->val_type = TEMP_VAL_CONST;
         ots->val = ts->val;
+        if (IS_DEAD_ARG(1)) {
+            temp_dead(s, args[1]);
+        }
     } else {
         /* The code in the first if block should have moved the
            temp to a register. */