PR target/42321

[pf3gnuchains/gcc-fork.git] / gcc / config / arm / arm.c

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 864d3af..6f42dd0 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -1877,13 +1877,6 @@ arm_override_options (void)
       flag_reorder_blocks = 1;
     }
 
-  /* Ideally we would want to use CFI directives to generate
-     debug info.  However this also creates the .eh_frame
-     section, so disable them until GAS can handle
-     this properly.  See PR40521. */
-  if (TARGET_AAPCS_BASED)
-    flag_dwarf2_cfi_asm = 0;
-
   /* Register global variables with the garbage collector.  */
   arm_add_gc_roots ();
 }
@@ -6235,6 +6228,15 @@ thumb1_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer)
       else if ((outer == IOR || outer == XOR || outer == AND)
               && INTVAL (x) < 256 && INTVAL (x) >= -256)
        return COSTS_N_INSNS (1);
+      else if (outer == AND)
+       {
+         int i;
+         /* This duplicates the tests in the andsi3 expander.  */
+         for (i = 9; i <= 31; i++)
+           if ((((HOST_WIDE_INT) 1) << i) - 1 == INTVAL (x)
+               || (((HOST_WIDE_INT) 1) << i) - 1 == ~INTVAL (x))
+             return COSTS_N_INSNS (2);
+       }
       else if (outer == ASHIFT || outer == ASHIFTRT
               || outer == LSHIFTRT)
        return 0;
@@ -13729,24 +13731,29 @@ arm_output_epilogue (rtx sibling)
 
       if (TARGET_HARD_FLOAT && TARGET_VFP)
        {
-         start_reg = FIRST_VFP_REGNUM;
-         for (reg = FIRST_VFP_REGNUM; reg < LAST_VFP_REGNUM; reg += 2)
+         int end_reg = LAST_VFP_REGNUM + 1;
+
+         /* Scan the registers in reverse order.  We need to match
+            any groupings made in the prologue and generate matching
+            pop operations.  */
+         for (reg = LAST_VFP_REGNUM - 1; reg >= FIRST_VFP_REGNUM; reg -= 2)
            {
              if ((!df_regs_ever_live_p (reg) || call_used_regs[reg])
-                 && (!df_regs_ever_live_p (reg + 1) || call_used_regs[reg + 1]))
+                 && (!df_regs_ever_live_p (reg + 1)
+                     || call_used_regs[reg + 1]))
                {
-                 if (start_reg != reg)
+                 if (end_reg > reg + 2)
                    vfp_output_fldmd (f, SP_REGNUM,
-                                     (start_reg - FIRST_VFP_REGNUM) / 2,
-                                     (reg - start_reg) / 2);
-                 start_reg = reg + 2;
+                                     (reg + 2 - FIRST_VFP_REGNUM) / 2,
+                                     (end_reg - (reg + 2)) / 2);
+                 end_reg = reg;
                }
            }
-         if (start_reg != reg)
-           vfp_output_fldmd (f, SP_REGNUM,
-                             (start_reg - FIRST_VFP_REGNUM) / 2,
-                             (reg - start_reg) / 2);
+         if (end_reg > reg + 2)
+           vfp_output_fldmd (f, SP_REGNUM, 0,
+                             (end_reg - (reg + 2)) / 2);
        }
+
       if (TARGET_IWMMXT)
        for (reg = FIRST_IWMMXT_REGNUM; reg <= LAST_IWMMXT_REGNUM; reg++)
          if (df_regs_ever_live_p (reg) && !call_used_regs[reg])