rs6000: Delete -mmfpgpr

This patch makes the -mmfpgpr option not do anything except warn that
the option is deprecated.


	* config/rs6000/rs6000.h (MASK_MFPGPR): Delete.
	* config/rs6000/rs6000.c (direct_move_p): Adjust.
	(rs6000_secondary_reload_simple_move): Adjust.
	(rs6000_opt_masks): Neuter the "mfpgpr" option.
	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Adjust.
	* config/rs6000/rs6000-cpus.def (ISA_2_5_MASKS_EMBEDDED): Adjust
	comment.
	(power6x): Adjust.
	* config/rs6000/rs6000.md (floatsi<mode>2_lfiwax): Adjust.
	(floatunssi<mode>2_lfiwzx): Adjust.
	(fix_trunc<mode>si2_stfiwx): Adjust.
	(fixuns_trunc<mode>si2_stfiwx): Adjust.
	* config/rs6000/rs6000.opt (mno-mfpgpr): New.
	(mfpgpr): Mark as deprecated.
	* doc/extend.texi (PowerPC Function Attributes): Delete mfpgpr.
	(Basic PowerPC Built-in Functions Available on ISA 2.05): Adjust.
	* doc/invoke.texi (RS/6000 and PowerPC Options): Delete -mmfpgpr.

gcc/testsuite/
	* gcc.target/powerpc/mmfpgpr.c: Delete.

From-SVN: r271889

11 files changed, 48 insertions, 79 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 80561d7..d012ce2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,25 @@
 2019-06-03  Segher Boessenkool  <segher@kernel.crashing.org>
 
+	* config/rs6000/rs6000.h (MASK_MFPGPR): Delete.
+	* config/rs6000/rs6000.c (direct_move_p): Adjust.
+	(rs6000_secondary_reload_simple_move): Adjust.
+	(rs6000_opt_masks): Neuter the "mfpgpr" option.
+	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Adjust.
+	* config/rs6000/rs6000-cpus.def (ISA_2_5_MASKS_EMBEDDED): Adjust
+	comment.
+	(power6x): Adjust.
+	* config/rs6000/rs6000.md (floatsi<mode>2_lfiwax): Adjust.
+	(floatunssi<mode>2_lfiwzx): Adjust.
+	(fix_trunc<mode>si2_stfiwx): Adjust.
+	(fixuns_trunc<mode>si2_stfiwx): Adjust.
+	* config/rs6000/rs6000.opt (mno-mfpgpr): New.
+	(mfpgpr): Mark as deprecated.
+	* doc/extend.texi (PowerPC Function Attributes): Delete mfpgpr.
+	(Basic PowerPC Built-in Functions Available on ISA 2.05): Adjust.
+	* doc/invoke.texi (RS/6000 and PowerPC Options): Delete -mmfpgpr.
+
+2019-06-03  Segher Boessenkool  <segher@kernel.crashing.org>
+
 	* config/rs6000/constraints.md (define_register_constraint "wg"):
 	Delete.
 	* config/rs6000/rs6000.h (enum r6000_reg_class_enum): Delete
diff --git a/gcc/config/rs6000/rs6000-c.c b/gcc/config/rs6000/rs6000-c.c
index bd1e97e..7854082 100644
--- a/gcc/config/rs6000/rs6000-c.c
+++ b/gcc/config/rs6000/rs6000-c.c
@@ -430,8 +430,6 @@ rs6000_target_modify_macros (bool define_p, HOST_WIDE_INT flags,
     rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR5X");
   if ((flags & OPTION_MASK_CMPB) != 0)
     rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR6");
-  if ((flags & OPTION_MASK_MFPGPR) != 0)
-    rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR6X");
   if ((flags & OPTION_MASK_POPCNTD) != 0)
     rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR7");
   /* Note that the OPTION_MASK_DIRECT_MOVE flag is automatically
diff --git a/gcc/config/rs6000/rs6000-cpus.def b/gcc/config/rs6000/rs6000-cpus.def
index 101efd5..14f8a0e 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -24,10 +24,9 @@
 #define ISA_2_2_MASKS		(ISA_2_1_MASKS | OPTION_MASK_POPCNTB)
 #define ISA_2_4_MASKS		(ISA_2_2_MASKS | OPTION_MASK_FPRND)
 
-  /* For ISA 2.05, do not add MFPGPR, since it isn't in ISA 2.06, and don't add
-     ALTIVEC, since in general it isn't a win on power6.  In ISA 2.04, fsel,
-     fre, fsqrt, etc. were no longer documented as optional.  Group masks by
-     server and embedded. */
+  /* For ISA 2.05, don't add ALTIVEC, since in general it isn't a win on
+     power6.  In ISA 2.04, fsel, fre, fsqrt, etc. were no longer documented
+     as optional.  Group masks by server and embedded. */
 #define ISA_2_5_MASKS_EMBEDDED	(ISA_2_4_MASKS				\
 				 | OPTION_MASK_CMPB			\
 				 | OPTION_MASK_RECIP_PRECISION		\
@@ -130,7 +129,6 @@
 				 | OPTION_MASK_HTM			\
 				 | OPTION_MASK_ISEL			\
 				 | OPTION_MASK_MFCRF			\
-				 | OPTION_MASK_MFPGPR			\
 				 | OPTION_MASK_MODULO			\
 				 | OPTION_MASK_MULHW			\
 				 | OPTION_MASK_NO_UPDATE		\
@@ -236,7 +234,7 @@ RS6000_CPU ("power6", PROCESSOR_POWER6, MASK_POWERPC64 | MASK_PPC_GPOPT
 	    | MASK_CMPB | MASK_DFP | MASK_RECIP_PRECISION)
 RS6000_CPU ("power6x", PROCESSOR_POWER6, MASK_POWERPC64 | MASK_PPC_GPOPT
 	    | MASK_PPC_GFXOPT | MASK_MFCRF | MASK_POPCNTB | MASK_FPRND
-	    | MASK_CMPB | MASK_DFP | MASK_MFPGPR | MASK_RECIP_PRECISION)
+	    | MASK_CMPB | MASK_DFP | MASK_RECIP_PRECISION)
 RS6000_CPU ("power7", PROCESSOR_POWER7, MASK_POWERPC64 | ISA_2_6_MASKS_SERVER)
 RS6000_CPU ("power8", PROCESSOR_POWER8, MASK_POWERPC64 | ISA_2_7_MASKS_SERVER)
 RS6000_CPU ("power9", PROCESSOR_POWER9, MASK_POWERPC64 | ISA_3_0_MASKS_SERVER)
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index ba40536..3aa19db 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -7473,30 +7473,22 @@ gpr_or_gpr_p (rtx op0, rtx op1)
 bool
 direct_move_p (rtx op0, rtx op1)
 {
-  int regno0, regno1;
-
   if (!REG_P (op0) || !REG_P (op1))
     return false;
 
-  if (!TARGET_DIRECT_MOVE && !TARGET_MFPGPR)
+  if (!TARGET_DIRECT_MOVE)
     return false;
 
-  regno0 = REGNO (op0);
-  regno1 = REGNO (op1);
+  int regno0 = REGNO (op0);
+  int regno1 = REGNO (op1);
   if (!HARD_REGISTER_NUM_P (regno0) || !HARD_REGISTER_NUM_P (regno1))
     return false;
 
-  if (INT_REGNO_P (regno0))
-    return (TARGET_DIRECT_MOVE) ? VSX_REGNO_P (regno1) : FP_REGNO_P (regno1);
-
-  else if (INT_REGNO_P (regno1))
-    {
-      if (TARGET_MFPGPR && FP_REGNO_P (regno0))
-	return true;
+  if (INT_REGNO_P (regno0) && VSX_REGNO_P (regno1))
+    return true;
 
-      else if (TARGET_DIRECT_MOVE && VSX_REGNO_P (regno0))
-	return true;
-    }
+  if (VSX_REGNO_P (regno0) && INT_REGNO_P (regno1))
+    return true;
 
   return false;
 }
@@ -19079,12 +19071,6 @@ rs6000_secondary_reload_simple_move (enum rs6000_reg_type to_type,
 	return true;
     }
 
-  /* Power6+: MFTGPR or MFFGPR.  */
-  else if (TARGET_MFPGPR && TARGET_POWERPC64 && size == 8
-      && ((to_type == GPR_REG_TYPE && from_type == FPR_REG_TYPE)
-	  || (to_type == FPR_REG_TYPE && from_type == GPR_REG_TYPE)))
-    return true;
-
   /* Move to/from SPR.  */
   else if ((size == 4 || (TARGET_POWERPC64 && size == 8))
 	   && ((to_type == GPR_REG_TYPE && from_type == SPR_REG_TYPE)
@@ -36452,7 +36438,7 @@ static struct rs6000_opt_mask const rs6000_opt_masks[] =
   { "htm",			OPTION_MASK_HTM,		false, true  },
   { "isel",			OPTION_MASK_ISEL,		false, true  },
   { "mfcrf",			OPTION_MASK_MFCRF,		false, true  },
-  { "mfpgpr",			OPTION_MASK_MFPGPR,		false, true  },
+  { "mfpgpr",			0,				false, true  },
   { "modulo",			OPTION_MASK_MODULO,		false, true  },
   { "mulhw",			OPTION_MASK_MULHW,		false, true  },
   { "multiple",			OPTION_MASK_MULTIPLE,		false, true  },
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 8ec1f35..3201152 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -509,7 +509,6 @@ extern int rs6000_vector_align[];
 #define MASK_HTM			OPTION_MASK_HTM
 #define MASK_ISEL			OPTION_MASK_ISEL
 #define MASK_MFCRF			OPTION_MASK_MFCRF
-#define MASK_MFPGPR			OPTION_MASK_MFPGPR
 #define MASK_MULHW			OPTION_MASK_MULHW
 #define MASK_MULTIPLE			OPTION_MASK_MULTIPLE
 #define MASK_NO_UPDATE			OPTION_MASK_NO_UPDATE
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index c8e43c5..c49614c 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -5265,8 +5265,7 @@
   rtx src = operands[1];
   rtx tmp;
 
-  if (!MEM_P (src) && TARGET_POWERPC64
-      && (TARGET_MFPGPR || TARGET_DIRECT_MOVE))
+  if (!MEM_P (src) && TARGET_POWERPC64 && TARGET_DIRECT_MOVE)
     tmp = convert_to_mode (DImode, src, false);
   else
     {
@@ -5341,8 +5340,7 @@
   rtx src = operands[1];
   rtx tmp;
 
-  if (!MEM_P (src) && TARGET_POWERPC64
-      && (TARGET_MFPGPR || TARGET_DIRECT_MOVE))
+  if (!MEM_P (src) && TARGET_POWERPC64 && TARGET_DIRECT_MOVE)
     tmp = convert_to_mode (DImode, src, true);
   else
     {
@@ -5703,7 +5701,7 @@
       emit_insn (gen_stfiwx (dest, tmp));
       DONE;
     }
-  else if (TARGET_POWERPC64 && (TARGET_MFPGPR || TARGET_DIRECT_MOVE) && !MEM_P (dest))
+  else if (TARGET_POWERPC64 && TARGET_DIRECT_MOVE && !MEM_P (dest))
     {
       dest = gen_lowpart (DImode, dest);
       emit_move_insn (dest, tmp);
@@ -5851,7 +5849,7 @@
       emit_insn (gen_stfiwx (dest, tmp));
       DONE;
     }
-  else if (TARGET_POWERPC64 && (TARGET_MFPGPR || TARGET_DIRECT_MOVE))
+  else if (TARGET_POWERPC64 && TARGET_DIRECT_MOVE)
     {
       dest = gen_lowpart (DImode, dest);
       emit_move_insn (dest, tmp);
diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
index 3a43536..342a349 100644
--- a/gcc/config/rs6000/rs6000.opt
+++ b/gcc/config/rs6000/rs6000.opt
@@ -144,9 +144,12 @@ mcmpb
 Target Report Mask(CMPB) Var(rs6000_isa_flags)
 Use PowerPC V2.05 compare bytes instruction.
 
+;; This option existed in the past, but now is always off.
+mno-mfpgpr
+Target RejectNegative Undocumented Ignore
+
 mmfpgpr
-Target Report Mask(MFPGPR) Var(rs6000_isa_flags)
-Use extended PowerPC V2.05 move floating point to/from GPR instructions.
+Target RejectNegative Undocumented Deprecated
 
 maltivec
 Target Report Mask(ALTIVEC) Var(rs6000_isa_flags)
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 777d974..2520835 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -5432,13 +5432,6 @@ Generate code that uses (does not use) the move from condition
 register field instruction implemented on the POWER4 processor and
 other processors that support the PowerPC V2.01 architecture.
 
-@item mfpgpr
-@itemx no-mfpgpr
-@cindex @code{target("mfpgpr")} function attribute, PowerPC
-Generate code that uses (does not use) the FP move to/from general
-purpose register instructions implemented on the POWER6X processor and
-other processors that support the extended PowerPC V2.05 architecture.
-
 @item mulhw
 @itemx no-mulhw
 @cindex @code{target("mulhw")} function attribute, PowerPC
@@ -16879,8 +16872,8 @@ enabling the @option{-mpowerpc64}, @option{-mpowerpc-gpopt},
 @option{-mpowerpc-gfxopt}, @option{-mmfcrf}, @option{-mpopcntb},
 @option{-mfprnd}, @option{-mcmpb}, @option{-mhard-dfp}, and
 @option{-mrecip-precision} options.  Specify the
-@option{-maltivec} and @option{-mfpgpr} options explicitly in
-combination with the above options if they are desired.
+@option{-maltivec} option explicitly in
+combination with the above options if desired.
 
 The following functions require option @option{-mcmpb}.
 @smallexample
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 9e2fab5..91c9bb8 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1076,7 +1076,7 @@ See RS/6000 and PowerPC Options.
 -mpowerpc-gfxopt  -mno-powerpc-gfxopt @gol
 -mmfcrf  -mno-mfcrf  -mpopcntb  -mno-popcntb  -mpopcntd  -mno-popcntd @gol
 -mfprnd  -mno-fprnd @gol
--mcmpb  -mno-cmpb  -mmfpgpr  -mno-mfpgpr  -mhard-dfp  -mno-hard-dfp @gol
+-mcmpb  -mno-cmpb  -mhard-dfp  -mno-hard-dfp @gol
 -mfull-toc   -mminimal-toc  -mno-fp-in-toc  -mno-sum-in-toc @gol
 -m64  -m32  -mxl-compat  -mno-xl-compat  -mpe @gol
 -malign-power  -malign-natural @gol
@@ -24014,8 +24014,6 @@ These @samp{-m} options are defined for the IBM RS/6000 and PowerPC:
 @need 800
 @itemx -mcmpb
 @itemx -mno-cmpb
-@itemx -mmfpgpr
-@itemx -mno-mfpgpr
 @itemx -mhard-dfp
 @itemx -mno-hard-dfp
 @opindex mpowerpc-gpopt
@@ -24034,8 +24032,6 @@ These @samp{-m} options are defined for the IBM RS/6000 and PowerPC:
 @opindex mno-fprnd
 @opindex mcmpb
 @opindex mno-cmpb
-@opindex mmfpgpr
-@opindex mno-mfpgpr
 @opindex mhard-dfp
 @opindex mno-hard-dfp
 You use these options to specify which instructions are available on the
@@ -24069,10 +24065,6 @@ processors that support the PowerPC V2.03 architecture.
 The @option{-mcmpb} option allows GCC to generate the compare bytes
 instruction implemented on the POWER6 processor and other processors
 that support the PowerPC V2.05 architecture.
-The @option{-mmfpgpr} option allows GCC to generate the FP move to/from
-general-purpose register instructions implemented on the POWER6X
-processor and other processors that support the extended PowerPC V2.05
-architecture.
 The @option{-mhard-dfp} option allows GCC to generate the decimal
 floating-point instructions implemented on some POWER processors.
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index bc4010e..3f7ddfd 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2019-06-03  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* gcc.target/powerpc/mmfpgpr.c: Delete.
+
 2019-06-03  David Edelsohn  <dje.gcc@gmail.com>
 
 	* gcc.dg/debug/enum-1.c: Add -fno-eliminate-unused-debug-symbols
diff --git a/gcc/testsuite/gcc.target/powerpc/mmfpgpr.c b/gcc/testsuite/gcc.target/powerpc/mmfpgpr.c
deleted file mode 100644
index d7063a4..0000000
--- a/gcc/testsuite/gcc.target/powerpc/mmfpgpr.c
+++ /dev/null
@@ -1,22 +0,0 @@
-/* { dg-do compile { target { powerpc*-*-* && lp64 } } } */
-/* { dg-skip-if "" { powerpc*-*-darwin* } } */
-/* { dg-require-effective-target powerpc_vsx_ok } */
-/* { dg-options "-O2 -mdejagnu-cpu=power6x -mmfpgpr" } */
-/* { dg-final { scan-assembler "mffgpr" } } */
-/* { dg-final { scan-assembler "mftgpr" } } */
-
-/* Test that we generate the instructions to move between the GPR and FPR
-   registers under power6x.  */
-
-extern long return_long (void);
-extern double return_double (void);
-
-double return_double2 (void)
-{
-  return (double) return_long ();
-}
-
-long return_long2 (void)
-{
-  return (long) return_double ();
-}