amdgcn: Fix attributes for LLVM-12 [PR 100208]

This should work for a wider range of LLVM 12 variants now.
More work required for LLVM 13 though.

gcc/ChangeLog:

	PR target/100208
	* config.in: Regenerate.
	* config/gcn/gcn-hsa.h (A_FIJI): New define.
	(A_900): New define.
	(A_906): New define.
	(A_908): New define.
	(ASM_SPEC): Use A_FIJI, A_900, A_906 and A_908.
	* config/gcn/gcn.c (output_file_start): Adjust attributes according
	to the assembler capabilities.
	* config/gcn/mkoffload.c (main): Likewise.
	* configure: Regenerate.
	* configure.ac: Add tests for LLVM assembler attribute features.

6 files changed, 235 insertions, 6 deletions

diff --git a/gcc/config.in b/gcc/config.in
index 2abac53..affaff2 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -1449,6 +1449,30 @@
 #endif
 
 
+/* Define if your assembler allows -mattr=+sram-ecc for fiji. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_GCN_SRAM_ECC_FIJI
+#endif
+
+
+/* Define if your assembler allows -mattr=+sram-ecc for gfx900. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_GCN_SRAM_ECC_GFX900
+#endif
+
+
+/* Define if your assembler allows -mattr=+sram-ecc for gfx906. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_GCN_SRAM_ECC_GFX906
+#endif
+
+
+/* Define if your assembler allows -mattr=+sram-ecc for gfx908. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_GCN_SRAM_ECC_GFX908
+#endif
+
+
 /* Define to 1 if you have the `getchar_unlocked' function. */
 #ifndef USED_FOR_TARGET
 #undef HAVE_GETCHAR_UNLOCKED
diff --git a/gcc/config/gcn/gcn-hsa.h b/gcc/config/gcn/gcn-hsa.h
index 724e9a3..fc99c8d 100644
--- a/gcc/config/gcn/gcn-hsa.h
+++ b/gcc/config/gcn/gcn-hsa.h
@@ -75,6 +75,28 @@ extern unsigned int gcn_local_sym_hash (const char *name);
    supported for gcn.  */
 #define GOMP_SELF_SPECS ""
 
+#ifdef HAVE_GCN_SRAM_ECC_FIJI
+#define A_FIJI
+#else
+#define A_FIJI "!march=*:;march=fiji:;"
+#endif
+#ifdef HAVE_GCN_SRAM_ECC_GFX900
+#define A_900
+#else
+#define A_900 "march=gfx900:;"
+#endif
+#ifdef HAVE_GCN_SRAM_ECC_GFX906
+#define A_906
+#else
+#define A_906 "march=gfx906:;"
+#endif
+#ifdef HAVE_GCN_SRAM_ECC_GFX908
+#define A_908
+#else
+#define A_908 "march=gfx908:;"
+#endif
+
+/* These targets can't have SRAM-ECC, even if a broken assembler allows it.  */
 #define DRIVER_SELF_SPECS \
   "%{march=fiji|march=gfx900|march=gfx906:%{!msram-ecc=*:-msram-ecc=off}}"
 
@@ -83,7 +105,8 @@ extern unsigned int gcn_local_sym_hash (const char *name);
 		  "%:last_arg(%{march=*:-mcpu=%*}) " \
 		  "-mattr=%{mxnack:+xnack;:-xnack} " \
 		  /* FIXME: support "any" when we move to HSACOv4.  */ \
-		  "-mattr=%{!msram-ecc=off:+sram-ecc;:-sram-ecc} " \
+		  "-mattr=%{" A_FIJI A_900 A_906 A_908 \
+			    "!msram-ecc=off:+sram-ecc;:-sram-ecc} " \
 		  "-filetype=obj"
 #define LINK_SPEC "--pie --export-dynamic"
 #define LIB_SPEC  "-lc"
diff --git a/gcc/config/gcn/gcn.c b/gcc/config/gcn/gcn.c
index 385b90c..d25c4e5 100644
--- a/gcc/config/gcn/gcn.c
+++ b/gcc/config/gcn/gcn.c
@@ -5181,18 +5181,39 @@ static void
 output_file_start (void)
 {
   const char *cpu;
+  bool use_sram = flag_sram_ecc;
   switch (gcn_arch)
     {
-    case PROCESSOR_FIJI: cpu = "gfx803"; break;
-    case PROCESSOR_VEGA10: cpu = "gfx900"; break;
-    case PROCESSOR_VEGA20: cpu = "gfx906"; break;
-    case PROCESSOR_GFX908: cpu = "gfx908"; break;
+    case PROCESSOR_FIJI:
+      cpu = "gfx803";
+#ifndef HAVE_GCN_SRAM_ECC_FIJI
+      use_sram = false;
+#endif
+      break;
+    case PROCESSOR_VEGA10:
+      cpu = "gfx900";
+#ifndef HAVE_GCN_SRAM_ECC_GFX900
+      use_sram = false;
+#endif
+      break;
+    case PROCESSOR_VEGA20:
+      cpu = "gfx906";
+#ifndef HAVE_GCN_SRAM_ECC_GFX906
+      use_sram = false;
+#endif
+      break;
+    case PROCESSOR_GFX908:
+      cpu = "gfx908";
+#ifndef HAVE_GCN_SRAM_ECC_GFX908
+      use_sram = false;
+#endif
+      break;
     default: gcc_unreachable ();
     }
 
   const char *xnack = (flag_xnack ? "+xnack" : "");
   /* FIXME: support "any" when we move to HSACOv4.  */
-  const char *sram_ecc = (flag_sram_ecc ? "+sram-ecc" : "");
+  const char *sram_ecc = (use_sram ? "+sram-ecc" : "");
 
   fprintf(asm_out_file, "\t.amdgcn_target \"amdgcn-unknown-amdhsa--%s%s%s\"\n",
 	  cpu, xnack, sram_ecc);
diff --git a/gcc/config/gcn/mkoffload.c b/gcc/config/gcn/mkoffload.c
index 804cc26..732bdfd 100644
--- a/gcc/config/gcn/mkoffload.c
+++ b/gcc/config/gcn/mkoffload.c
@@ -898,6 +898,9 @@ main (int argc, char **argv)
       case EF_AMDGPU_MACH_AMDGCN_GFX803:
       case EF_AMDGPU_MACH_AMDGCN_GFX900:
       case EF_AMDGPU_MACH_AMDGCN_GFX906:
+#ifndef HAVE_GCN_SRAM_ECC_GFX908
+      case EF_AMDGPU_MACH_AMDGCN_GFX908:
+#endif
 	break;
       default:
 	/* FIXME: change this when we move to HSACOv4.  */
diff --git a/gcc/configure b/gcc/configure
index a15f8b4..8b5acd7 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -29046,6 +29046,135 @@ $as_echo "$gcc_cv_as_gcn_global_load_fixed" >&6; }
     ;;
 esac
 
+case "$target" in
+  amdgcn-* | gcn-*)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for assembler accepts -mattr=+sram-ecc for fiji" >&5
+$as_echo_n "checking assembler for assembler accepts -mattr=+sram-ecc for fiji... " >&6; }
+if ${gcc_cv_as_gcn_sram_ecc_fiji+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_gcn_sram_ecc_fiji=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '.amdgcn_target "amdgcn-unknown-amdhsa--gfx803+sram-ecc"' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -triple=amdgcn--amdhsa -mcpu=fiji -mattr=-xnack -mattr=+sram-ecc -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_gcn_sram_ecc_fiji=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_gcn_sram_ecc_fiji" >&5
+$as_echo "$gcc_cv_as_gcn_sram_ecc_fiji" >&6; }
+if test $gcc_cv_as_gcn_sram_ecc_fiji = yes; then
+
+$as_echo "#define HAVE_GCN_SRAM_ECC_FIJI 1" >>confdefs.h
+
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for assembler accepts -mattr=+sram-ecc for gfx900" >&5
+$as_echo_n "checking assembler for assembler accepts -mattr=+sram-ecc for gfx900... " >&6; }
+if ${gcc_cv_as_gcn_sram_ecc_gfx900+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_gcn_sram_ecc_gfx900=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '.amdgcn_target "amdgcn-unknown-amdhsa--gfx900+sram-ecc"' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -triple=amdgcn--amdhsa -mcpu=gfx900 -mattr=-xnack -mattr=+sram-ecc -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_gcn_sram_ecc_gfx900=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_gcn_sram_ecc_gfx900" >&5
+$as_echo "$gcc_cv_as_gcn_sram_ecc_gfx900" >&6; }
+if test $gcc_cv_as_gcn_sram_ecc_gfx900 = yes; then
+
+$as_echo "#define HAVE_GCN_SRAM_ECC_GFX900 1" >>confdefs.h
+
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for assembler accepts -mattr=+sram-ecc for gfx906" >&5
+$as_echo_n "checking assembler for assembler accepts -mattr=+sram-ecc for gfx906... " >&6; }
+if ${gcc_cv_as_gcn_sram_ecc_gfx906+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_gcn_sram_ecc_gfx906=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '.amdgcn_target "amdgcn-unknown-amdhsa--gfx906+sram-ecc"' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -triple=amdgcn--amdhsa -mcpu=gfx906 -mattr=-xnack -mattr=+sram-ecc -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_gcn_sram_ecc_gfx906=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_gcn_sram_ecc_gfx906" >&5
+$as_echo "$gcc_cv_as_gcn_sram_ecc_gfx906" >&6; }
+if test $gcc_cv_as_gcn_sram_ecc_gfx906 = yes; then
+
+$as_echo "#define HAVE_GCN_SRAM_ECC_GFX906 1" >>confdefs.h
+
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for assembler accepts -mattr=+sram-ecc for gfx908" >&5
+$as_echo_n "checking assembler for assembler accepts -mattr=+sram-ecc for gfx908... " >&6; }
+if ${gcc_cv_as_gcn_sram_ecc_gfx908+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_gcn_sram_ecc_gfx908=no
+  if test x$gcc_cv_as != x; then
+    $as_echo '.amdgcn_target "amdgcn-unknown-amdhsa--gfx908+sram-ecc"' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -triple=amdgcn--amdhsa -mcpu=gfx908 -mattr=-xnack -mattr=+sram-ecc -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	gcc_cv_as_gcn_sram_ecc_gfx908=yes
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_gcn_sram_ecc_gfx908" >&5
+$as_echo "$gcc_cv_as_gcn_sram_ecc_gfx908" >&6; }
+if test $gcc_cv_as_gcn_sram_ecc_gfx908 = yes; then
+
+$as_echo "#define HAVE_GCN_SRAM_ECC_GFX908 1" >>confdefs.h
+
+fi
+
+    ;;
+esac
+
 # ??? Not all targets support dwarf2 debug_line, even within a version
 # of gas.  Moreover, we need to emit a valid instruction to trigger any
 # info to the output file.  So, as supported targets are added to gas 2.11,
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 26da073..c8e0d63 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -5431,6 +5431,35 @@ EOF
     ;;
 esac
 
+case "$target" in
+  amdgcn-* | gcn-*)
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for fiji],
+      gcc_cv_as_gcn_sram_ecc_fiji,,
+      [-triple=amdgcn--amdhsa -mcpu=fiji -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx803+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_FIJI, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for fiji.])])
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for gfx900],
+      gcc_cv_as_gcn_sram_ecc_gfx900,,
+      [-triple=amdgcn--amdhsa -mcpu=gfx900 -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx900+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_GFX900, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for gfx900.])])
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for gfx906],
+      gcc_cv_as_gcn_sram_ecc_gfx906,,
+      [-triple=amdgcn--amdhsa -mcpu=gfx906 -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx906+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_GFX906, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for gfx906.])])
+    gcc_GAS_CHECK_FEATURE([assembler accepts -mattr=+sram-ecc for gfx908],
+      gcc_cv_as_gcn_sram_ecc_gfx908,,
+      [-triple=amdgcn--amdhsa -mcpu=gfx908 -mattr=-xnack -mattr=+sram-ecc],
+      [.amdgcn_target "amdgcn-unknown-amdhsa--gfx908+sram-ecc"],,
+      [AC_DEFINE(HAVE_GCN_SRAM_ECC_GFX908, 1,
+       [Define if your assembler allows -mattr=+sram-ecc for gfx908.])])
+    ;;
+esac
+
 # ??? Not all targets support dwarf2 debug_line, even within a version
 # of gas.  Moreover, we need to emit a valid instruction to trigger any
 # info to the output file.  So, as supported targets are added to gas 2.11,