re PR target/56995 (sh4 -mfmovd: ICE in find_costs_and_classes)

2013-04-18  Christian Bruel  <christian.bruel@st.com>

       PR target/56995
       * config/sh/sh.h (enum reg_class): Remove DF_HI_REGS.
       (REG_CLASS_NAMES): Idem.
       (REG_CLASS_CONTENTS): Idem.
       (REGCLASS_HAS_FP_REG): Idem.
       * config/sh/sh.c (sh_cannot_change_mode_class): Idem.
       (sh_conditional_register_usage): Idem.

From-SVN: r198123

gcc/ChangeLog

+2013-04-18  Christian Bruel  <christian.bruel@st.com>
+
+	PR target/56995
+	* config/sh/sh.h (enum reg_class): Remove DF_HI_REGS.
+	(REG_CLASS_NAMES): Idem.
+	(REG_CLASS_CONTENTS): Idem.
+	(REGCLASS_HAS_FP_REG): Idem.
+	* config/sh/sh.c (sh_cannot_change_mode_class): Idem.
+	(sh_conditional_register_usage): Idem.
+
 2013-04-21  Jeff Law  <law@redhat.com>
 
 	* tree-ssa-forwprop.c (simplify_conversion_from_bitmask): New function.

gcc/config/sh/sh.c

@@ -12163,7 +12163,7 @@ sh_cannot_change_mode_class (enum machine_mode from, enum machine_mode to,
       else
 	{
 	  if (GET_MODE_SIZE (from) < 8)
-	    return reg_classes_intersect_p (DF_HI_REGS, rclass);
+	    return reg_classes_intersect_p (DF_REGS, rclass);
 	}
     }
   return false;
@@ -13210,9 +13210,7 @@ sh_conditional_register_usage (void)
       call_really_used_regs[MACH_REG] = 0;
       call_really_used_regs[MACL_REG] = 0;
     }
-  for (regno = FIRST_FP_REG + (TARGET_LITTLE_ENDIAN != 0);
-       regno <= LAST_FP_REG; regno += 2)
-    SET_HARD_REG_BIT (reg_class_contents[DF_HI_REGS], regno);
+
   if (TARGET_SHMEDIA)
     {
       for (regno = FIRST_TARGET_REG; regno <= LAST_TARGET_REG; regno ++)

gcc/config/sh/sh.h

@@ -984,7 +984,6 @@ enum reg_class
   GENERAL_REGS,
   FP0_REGS,
   FP_REGS,
-  DF_HI_REGS,
   DF_REGS,
   FPSCR_REGS,
   GENERAL_FP_REGS,
@@ -1010,7 +1009,6 @@ enum reg_class
   "GENERAL_REGS",	\
   "FP0_REGS",		\
   "FP_REGS",		\
-  "DF_HI_REGS",		\
   "DF_REGS",		\
   "FPSCR_REGS",		\
   "GENERAL_FP_REGS",	\
@@ -1046,8 +1044,6 @@ enum reg_class
   { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000 },	\
 /* FP_REGS:  */								\
   { 0x00000000, 0x00000000, 0xffffffff, 0xffffffff, 0x00000000 },	\
-/* DF_HI_REGS:  Initialized in TARGET_CONDITIONAL_REGISTER_USAGE.  */	\
-  { 0x00000000, 0x00000000, 0xffffffff, 0xffffffff, 0x0000ff00 },	\
 /* DF_REGS:  */								\
   { 0x00000000, 0x00000000, 0xffffffff, 0xffffffff, 0x0000ff00 },	\
 /* FPSCR_REGS:  */							\
@@ -1922,7 +1918,7 @@ struct sh_args {
 
 #define REGCLASS_HAS_FP_REG(CLASS) \
   ((CLASS) == FP0_REGS || (CLASS) == FP_REGS \
-   || (CLASS) == DF_REGS || (CLASS) == DF_HI_REGS)
+   || (CLASS) == DF_REGS)
 
 /* ??? Perhaps make MEMORY_MOVE_COST depend on compiler option?  This
    would be so that people with slow memory systems could generate

gcc/testsuite/ChangeLog

+2013-04-18  Christian Bruel  <christian.bruel@st.com>
+
+	PR target/56995
+	* gcc.target/sh/mfmovd.c: Add new function and check hard_float.
+
 2013-04-21  Jeff Law  <law@redhat.com>
 
 	* gcc.dg/tree-ssa/forwprop-26.c: New test.

gcc/testsuite/gcc.target/sh/mfmovd.c

 /* Verify that we generate fmov.d instructions to move doubles when -mfmovd 
    option is enabled.  */
 /* { dg-do compile { target "sh*-*-*" } } */
+/* { dg-require-effective-target hard_float } */
 /* { dg-options "-mfmovd" } */
-/* { dg-skip-if "" { "sh*-*-*" } { "*" } { "-m2a" "-m2a-single" "-m4" "-m4-single" "-m4-100" "-m4-100-single" "-m4-200" "-m4-200-single" "-m4-300" "-m4-300-single" "-m4a" "-m4a-single" } }  */
+/* { dg-skip-if "" { *-*-* }  { "*-single-only" } { "" } } */
 /* { dg-final { scan-assembler "fmov.d" } } */
 
 extern double g;
@@ -13,3 +14,9 @@ f (double d)
   g = d;
 }
 
+extern float h;
+
+void f2 ()
+{
+  h = g;
+}