Add -march=ia to x86 backend

	* config.gcc: Support --with-cpu=ia.

	* config/i386/i386.c (cpu_names): Add "ia".
	(processor_alias_table): Likewise.
	(ix86_option_override_internal): Disallow -march=ia.
	* config/i386/i386.h (target_cpu_default): Add
	TARGET_CPU_DEFAULT_ia.

	* doc/invoke.texi: Document -mtune=ia.

From-SVN: r205719

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 73fdd1a..f1cd9b8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2013-12-05  H.J. Lu  <hongjiu.lu@intel.com>
+
+       * config.gcc: Support --with-cpu=ia.
+
+       * config/i386/i386.c (cpu_names): Add "ia".
+       (processor_alias_table): Likewise.
+       (ix86_option_override_internal): Disallow -march=ia.
+       * config/i386/i386.h (target_cpu_default): Add
+       TARGET_CPU_DEFAULT_ia.
+
+       * doc/invoke.texi: Document -mtune=ia.
+
 2013-12-05  Vladimir Makarov  <vmakarov@redhat.com>
 
        PR rtl-optimization/59317

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 1f20f18..dd180a0 100644 (file)
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1398,7 +1398,7 @@ i[34567]86-*-linux* | i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i
                        TM_MULTILIB_CONFIG=`echo $TM_MULTILIB_CONFIG | sed 's/^,//'`
                        need_64bit_isa=yes
                        case X"${with_cpu}" in
-                       Xgeneric|Xatom|Xslm|Xcore2|Xcorei7|Xcorei7-avx|Xnocona|Xx86-64|Xbdver4|Xbdver3|Xbdver2|Xbdver1|Xbtver2|Xbtver1|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx|Xathlon64-sse3|Xk8-sse3|Xopteron-sse3)                    
+                       Xgeneric|Xia|Xatom|Xslm|Xcore2|Xcorei7|Xcorei7-avx|Xnocona|Xx86-64|Xbdver4|Xbdver3|Xbdver2|Xbdver1|Xbtver2|Xbtver1|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx|Xathlon64-sse3|Xk8-sse3|Xopteron-sse3)                        
                                ;;
                        X)
                                if test x$with_cpu_64 = x; then
@@ -1407,7 +1407,7 @@ i[34567]86-*-linux* | i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | i
                                ;;
                        *)
                                echo "Unsupported CPU used in --with-cpu=$with_cpu, supported values:" 1>&2
-                               echo "generic atom slm core2 corei7 corei7-avx nocona x86-64 bdver4 bdver3 bdver2 bdver1 btver2 btver1 amdfam10 barcelona k8 opteron athlon64 athlon-fx athlon64-sse3 k8-sse3 opteron-sse3" 1>&2
+                               echo "generic ia atom slm core2 corei7 corei7-avx nocona x86-64 bdver4 bdver3 bdver2 bdver1 btver2 btver1 amdfam10 barcelona k8 opteron athlon64 athlon-fx athlon64-sse3 k8-sse3 opteron-sse3" 1>&2
                                exit 1
                                ;;
                        esac
@@ -1519,7 +1519,7 @@ i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]*)
                tmake_file="$tmake_file i386/t-sol2-64"
                need_64bit_isa=yes
                case X"${with_cpu}" in
-               Xgeneric|Xatom|Xslm|Xcore2|Xcorei7|Xcorei7-avx|Xnocona|Xx86-64|Xbdver4|Xbdver3|Xbdver2|Xbdver1|Xbtver2|Xbtver1|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx|Xathlon64-sse3|Xk8-sse3|Xopteron-sse3)
+               Xgeneric|Xia|Xatom|Xslm|Xcore2|Xcorei7|Xcorei7-avx|Xnocona|Xx86-64|Xbdver4|Xbdver3|Xbdver2|Xbdver1|Xbtver2|Xbtver1|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx|Xathlon64-sse3|Xk8-sse3|Xopteron-sse3)
                        ;;
                X)
                        if test x$with_cpu_64 = x; then
@@ -1528,7 +1528,7 @@ i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]*)
                        ;;
                *)
                        echo "Unsupported CPU used in --with-cpu=$with_cpu, supported values:" 1>&2
-                       echo "generic atom slm core2 corei7 corei7-avx nocona x86-64 bdver4 bdver3 bdver2 bdver1 btver2 btver1 amdfam10 barcelona k8 opteron athlon64 athlon-fx athlon64-sse3 k8-sse3 opteron-sse3" 1>&2
+                       echo "generic ia atom slm core2 corei7 corei7-avx nocona x86-64 bdver4 bdver3 bdver2 bdver1 btver2 btver1 amdfam10 barcelona k8 opteron athlon64 athlon-fx athlon64-sse3 k8-sse3 opteron-sse3" 1>&2
                        exit 1
                        ;;
                esac
@@ -1604,7 +1604,7 @@ i[34567]86-*-mingw* | x86_64-*-mingw*)
                        if test x$enable_targets = xall; then
                                tm_defines="${tm_defines} TARGET_BI_ARCH=1"
                                case X"${with_cpu}" in
-                               Xgeneric|Xatom|Xslm|Xcore2|Xcorei7|Xcorei7-avx|Xnocona|Xx86-64|Xbdver4|Xbdver3|Xbdver2|Xbdver1|Xbtver2|Xbtver1|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx|Xathlon64-sse3|Xk8-sse3|Xopteron-sse3)
+                               Xgeneric|Xia|Xatom|Xslm|Xcore2|Xcorei7|Xcorei7-avx|Xnocona|Xx86-64|Xbdver4|Xbdver3|Xbdver2|Xbdver1|Xbtver2|Xbtver1|Xamdfam10|Xbarcelona|Xk8|Xopteron|Xathlon64|Xathlon-fx|Xathlon64-sse3|Xk8-sse3|Xopteron-sse3)
                                        ;;
                                X)
                                        if test x$with_cpu_64 = x; then
@@ -1613,7 +1613,7 @@ i[34567]86-*-mingw* | x86_64-*-mingw*)
                                        ;;
                                *)
                                        echo "Unsupported CPU used in --with-cpu=$with_cpu, supported values:" 1>&2
-                                       echo "generic atom slm core2 corei7 Xcorei7-avx nocona x86-64 bdver4 bdver3 bdver2 bdver1 btver2 btver1 amdfam10 barcelona k8 opteron athlon64 athlon-fx athlon64-sse3 k8-sse3 opteron-sse3" 1>&2
+                                       echo "generic ia atom slm core2 corei7 Xcorei7-avx nocona x86-64 bdver4 bdver3 bdver2 bdver1 btver2 btver1 amdfam10 barcelona k8 opteron athlon64 athlon-fx athlon64-sse3 k8-sse3 opteron-sse3" 1>&2
                                        exit 1
                                        ;;
                                esac
@@ -3664,7 +3664,7 @@ case "${target}" in
                                esac
                                # OK
                                ;;
-                       "" | x86-64 | generic | native \
+                       "" | x86-64 | generic | ia | native \
                        | k8 | k8-sse3 | athlon64 | athlon64-sse3 | opteron \
                        | opteron-sse3 | athlon-fx | bdver4 | bdver3 | bdver2 \
                        | bdver1 | btver2 |  btver1 | amdfam10 | barcelona \

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 0f6612d..382f8fb 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -2434,6 +2434,7 @@ static const char *const cpu_names[TARGET_CPU_DEFAULT_max] =
   "core-avx2",
   "atom",
   "slm",
+  "ia",
   "geode",
   "k6",
   "k6-2",
@@ -3142,6 +3143,9 @@ ix86_option_override_internal (bool main_args_p,
        PTA_64BIT | PTA_MMX | PTA_SSE | PTA_SSE2 | PTA_SSE3 | PTA_SSSE3
        | PTA_SSE4_1 | PTA_SSE4_2 | PTA_CX16 | PTA_POPCNT | PTA_AES
        | PTA_PCLMUL | PTA_RDRND | PTA_MOVBE | PTA_FXSR},
+      {"ia", PROCESSOR_SLM, CPU_SLM,
+       PTA_64BIT | PTA_MMX | PTA_SSE | PTA_SSE2 | PTA_SSE3 | PTA_SSSE3
+       | PTA_SSE4_1 | PTA_SSE4_2 | PTA_CX16 | PTA_POPCNT | PTA_FXSR},
       {"geode", PROCESSOR_GEODE, CPU_GEODE,
        PTA_MMX | PTA_3DNOW | PTA_3DNOW_A | PTA_PREFETCH_SSE | PTA_PRFCHW},
       {"k6", PROCESSOR_K6, CPU_K6, PTA_MMX},
@@ -3628,6 +3632,9 @@ ix86_option_override_internal (bool main_args_p,
   if (!strcmp (opts->x_ix86_arch_string, "generic"))
     error ("generic CPU can be used only for %stune=%s %s",
           prefix, suffix, sw);
+  else if (!strcmp (ix86_arch_string, "ia"))
+    error ("ia CPU can be used only for %stune=%s %s",
+          prefix, suffix, sw);
   else if (!strncmp (opts->x_ix86_arch_string, "generic", 7) || i == pta_size)
     error ("bad value (%s) for %sarch=%s %s",
           opts->x_ix86_arch_string, prefix, suffix, sw);

diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 113c75e..db81aea 100644 (file)
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -626,6 +626,7 @@ enum target_cpu_default
   TARGET_CPU_DEFAULT_haswell,
   TARGET_CPU_DEFAULT_atom,
   TARGET_CPU_DEFAULT_slm,
+  TARGET_CPU_DEFAULT_ia,
 
   TARGET_CPU_DEFAULT_geode,
   TARGET_CPU_DEFAULT_k6,

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 704d474..ed5b60f 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14743,7 +14743,7 @@ then @option{-mtune=pentium4} generates code that is tuned for Pentium 4
 but still runs on i686 machines.
 
 The choices for @var{cpu-type} are the same as for @option{-march}.
-In addition, @option{-mtune} supports an extra choice for @var{cpu-type}:
+In addition, @option{-mtune} supports 2 extra choices for @var{cpu-type}:
 
 @table @samp
 @item generic
@@ -14764,6 +14764,26 @@ indicates the instruction set the compiler can use, and there is no
 generic instruction set applicable to all processors.  In contrast,
 @option{-mtune} indicates the processor (or, in this case, collection of
 processors) for which the code is optimized.
+
+@item ia
+Produce code optimized for the most current Intel processors, which are
+Haswell and Silvermont for this version of GCC.  If you know the CPU
+on which your code will run, then you should use the corresponding
+@option{-mtune} or @option{-march} option instead of @option{-mtune=ia}.
+But, if you want your application performs better on both Haswell and
+Silvermont, then you should use this option.
+
+As new Intel processors are deployed in the marketplace, the behavior of
+this option will change.  Therefore, if you upgrade to a newer version of
+GCC, code generation controlled by this option will change to reflect
+the most current Intel processors at the time that version of GCC is
+released.
+
+There is no @option{-march=ia} option because @option{-march} indicates
+the instruction set the compiler can use, and there is no common
+instruction set applicable to all processors.  In contrast,
+@option{-mtune} indicates the processor (or, in this case, collection of
+processors) for which the code is optimized.
 @end table
 
 @item -mcpu=@var{cpu-type}