arm.c (use_return_insn): Do not use a single return instruction for interrupt handelr...

* config/arm/arm.c (use_return_insn): Do not use a single return instruction
for interrupt handelrs which have to create a stack frame.
(arm_expand_prologue): Do not pre-bias the return address of interrupt handlers
which create a stack frame.

From-SVN: r61698

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5e15284c2798bf9c0d8042f13b049574efb750eb..382396c08be68d0c8f11106082311166f60c89c0 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,53 @@
+2003-01-24  Nick Clifton  <nickc@redhat.com>
+
+       * config/arm/arm.c (use_return_insn): Do not use a single return
+       instruction for interrupt handelrs which have to create a stack
+       frame.
+       (arm_expand_prologue): Do not pre-bias the return address of
+       interrupt handlers which create a stack frame.
+
+2003-01-24  Nick Clifton  <nickc@redhat.com>
+
+       * Add sh2e support:
+
+       2002-08-12  Alexandre Oliva  <aoliva@redhat.com>
+
+               * config/sh/sh.c (output_branch) [TARGET_SH2E]: Handle
+               med_cbranches.  Fix logic in short_cbranches.
+
+       2002-04-03  Alexandre Oliva  <aoliva@redhat.com>
+
+               * config/sh/sh.md (delay for cbranch): Don't annul delay
+               slots on SH2e.
+               * config/sh/sh.c (sh_insn_length_adjustment): Add 2 for
+               cbranch with unfilled delay slot on SH2e.
+               (output_branch): Fill with a nop the delay slot of a
+               branch that required a delay slot but didn't get one.
+
+       2002-04-02  Alexandre Oliva  <aoliva@redhat.com>
+
+               * doc/invoke.texi (SH options): Document -m2e.
+               * config/sh/crt1.asm: Add __SH2E__ Next to __SH3E__.
+               * config/sh/lib1funcs.asm: Likewise.
+               * config/sh/sh.c: Replace all uses of TARGET_SH3E with SH2E.
+               * config/sh/sh.h (CPP_SPEC): Define __SH2E__ for -m2e, and
+               not __sh1__.
+               (CONDITIONAL_REGISTER_USAGE): Don't disable FP regs from
+               SH2E up.
+               (SH3E_BIT): Renamed to...
+               (SH_E_BIT): ... this.  Replace all uses.
+               (TARGET_SH2E): Define from SH_E_BIT and TARGET_SH2.
+               Replace all uses of TARGET_SH3E with TARGET_SH2E.
+               (TARGET_SWITCHES): Added 2e.
+               (OVERRIDE_OPTIONS): Set sh_cpu for SH2E.
+               (processor_type): Added PROCESSOR_SH2E.
+               * config/sh/sh.md: Replace all uses of TARGET_SH3E with
+               TARGET_SH2E, except in sqrtsf2_i.
+               (attribute cpu): Added sh2e.
+               * config/sh/t-sh (MULTILIB_OPTIONS): Replace m3e with m2e.
+               (MULTILIB_MATCHES): Use m2e multilib for m3e.
+               * config.gcc: Add sh2e target support.
+
 2003-01-24  Phil Edwards  <pme@gcc.gnu.org>
 
        Rename -W to -Wextra.

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 4bffcb5258321330013fc7956465687299147bce..db27913b0d2e073759a971cfb751fe303ec170df 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -938,6 +938,10 @@ use_return_insn (iscond)
      consideration.  */
   if (func_type & (ARM_FT_VOLATILE | ARM_FT_NAKED))
     return 0;
+
+  /* So do interrupt functions that use the frame pointer.  */
+  if (IS_INTERRUPT (func_type) && frame_pointer_needed)
+    return 0;
   
   /* As do variadic functions.  */
   if (current_function_pretend_args_size
@@ -7092,7 +7096,7 @@ output_move_double (operands)
                    {
                      if (GET_CODE (otherops[2]) == CONST_INT)
                        {
-                         switch (INTVAL (otherops[2]))
+                         switch ((int) INTVAL (otherops[2]))
                            {
                            case -8:
                              output_asm_insn ("ldm%?db\t%1, %M0", otherops);
@@ -7168,7 +7172,7 @@ output_move_double (operands)
        case PLUS:
          if (GET_CODE (XEXP (XEXP (operands[0], 0), 1)) == CONST_INT)
            {
-             switch (INTVAL (XEXP (XEXP (operands[0], 0), 1)))
+             switch ((int) INTVAL (XEXP (XEXP (operands[0], 0), 1)))
                {
                case -8:
                  output_asm_insn ("stm%?db\t%m0, %M1", operands);
@@ -8813,18 +8817,19 @@ arm_expand_prologue ()
       RTX_FRAME_RELATED_P (insn) = 1;
     }
 
-  /* If this is an interrupt service routine, and the link register is
-     going to be pushed, subtracting four now will mean that the
-     function return can be done with a single instruction.  */
+  /* If this is an interrupt service routine, and the link register
+     is going to be pushed, and we are not creating a stack frame,
+     (which would involve an extra push of IP and a pop in the epilogue)
+     subtracting four from LR now will mean that the function return
+     can be done with a single instruction.  */
   if ((func_type == ARM_FT_ISR || func_type == ARM_FT_FIQ)
-      && (live_regs_mask & (1 << LR_REGNUM)) != 0)
-    {
-      emit_insn (gen_rtx_SET (SImode, 
-                             gen_rtx_REG (SImode, LR_REGNUM),
-                             gen_rtx_PLUS (SImode,
-                                   gen_rtx_REG (SImode, LR_REGNUM),
-                                   GEN_INT (-4))));
-    }
+      && (live_regs_mask & (1 << LR_REGNUM)) != 0
+      && ! frame_pointer_needed)
+    emit_insn (gen_rtx_SET (SImode, 
+                           gen_rtx_REG (SImode, LR_REGNUM),
+                           gen_rtx_PLUS (SImode,
+                                         gen_rtx_REG (SImode, LR_REGNUM),
+                                         GEN_INT (-4))));
 
   if (live_regs_mask)
     {