path: root/toolchain/gcc/patches/10.5.0/revert-sparc.patch

diff -Nur gcc-10.3.0.orig/gcc/config/sparc/sparc.c gcc-10.3.0/gcc/config/sparc/sparc.c
--- gcc-10.3.0.orig/gcc/config/sparc/sparc.c	2021-04-08 13:56:28.201742273 +0200
+++ gcc-10.3.0/gcc/config/sparc/sparc.c	2022-01-24 10:19:53.724121161 +0100
@@ -4157,6 +4157,13 @@
 static bool
 sparc_cannot_force_const_mem (machine_mode mode, rtx x)
 {
+  /* After IRA has run in PIC mode, it is too late to put anything into the
+     constant pool if the PIC register hasn't already been initialized.  */
+  if ((lra_in_progress || reload_in_progress)
+      && flag_pic
+      && !crtl->uses_pic_offset_table)
+    return true;
+
   switch (GET_CODE (x))
     {
     case CONST_INT:
@@ -4192,11 +4199,9 @@
 }
 
 /* Global Offset Table support.  */
-static GTY(()) rtx got_symbol_rtx = NULL_RTX;
-static GTY(()) rtx got_register_rtx = NULL_RTX;
 static GTY(()) rtx got_helper_rtx = NULL_RTX;
-
-static GTY(()) bool got_helper_needed = false;
+static GTY(()) rtx got_register_rtx = NULL_RTX;
+static GTY(()) rtx got_symbol_rtx = NULL_RTX;
 
 /* Return the SYMBOL_REF for the Global Offset Table.  */
 
@@ -4209,6 +4214,27 @@
   return got_symbol_rtx;
 }
 
+#ifdef HAVE_GAS_HIDDEN
+# define USE_HIDDEN_LINKONCE 1
+#else
+# define USE_HIDDEN_LINKONCE 0
+#endif
+
+static void
+get_pc_thunk_name (char name[32], unsigned int regno)
+{
+  const char *reg_name = reg_names[regno];
+
+  /* Skip the leading '%' as that cannot be used in a
+     symbol name.  */
+  reg_name += 1;
+
+  if (USE_HIDDEN_LINKONCE)
+    sprintf (name, "__sparc_get_pc_thunk.%s", reg_name);
+  else
+    ASM_GENERATE_INTERNAL_LABEL (name, "LADDPC", regno);
+}
+
 /* Wrapper around the load_pcrel_sym{si,di} patterns.  */
 
 static rtx
@@ -4228,78 +4254,30 @@
   return insn;
 }
 
-/* Output the load_pcrel_sym{si,di} patterns.  */
-
-const char *
-output_load_pcrel_sym (rtx *operands)
-{
-  if (flag_delayed_branch)
-    {
-      output_asm_insn ("sethi\t%%hi(%a1-4), %0", operands);
-      output_asm_insn ("call\t%a2", operands);
-      output_asm_insn (" add\t%0, %%lo(%a1+4), %0", operands);
-    }
-  else
-    {
-      output_asm_insn ("sethi\t%%hi(%a1-8), %0", operands);
-      output_asm_insn ("add\t%0, %%lo(%a1-4), %0", operands);
-      output_asm_insn ("call\t%a2", operands);
-      output_asm_insn (" nop", NULL);
-    }
-
-  if (operands[2] == got_helper_rtx)
-    got_helper_needed = true;
-
-  return "";
-}
-
-#ifdef HAVE_GAS_HIDDEN
-# define USE_HIDDEN_LINKONCE 1
-#else
-# define USE_HIDDEN_LINKONCE 0
-#endif
-
 /* Emit code to load the GOT register.  */
 
 void
 load_got_register (void)
 {
-  rtx insn;
+  if (!got_register_rtx)
+    got_register_rtx = gen_rtx_REG (Pmode, GLOBAL_OFFSET_TABLE_REGNUM);
 
   if (TARGET_VXWORKS_RTP)
-    {
-      if (!got_register_rtx)
-	got_register_rtx = pic_offset_table_rtx;
-
-      insn = gen_vxworks_load_got ();
-    }
+    emit_insn (gen_vxworks_load_got ());
   else
     {
-      if (!got_register_rtx)
-	got_register_rtx = gen_rtx_REG (Pmode, GLOBAL_OFFSET_TABLE_REGNUM);
-
       /* The GOT symbol is subject to a PC-relative relocation so we need a
 	 helper function to add the PC value and thus get the final value.  */
       if (!got_helper_rtx)
 	{
 	  char name[32];
-
-	  /* Skip the leading '%' as that cannot be used in a symbol name.  */
-	  if (USE_HIDDEN_LINKONCE)
-	    sprintf (name, "__sparc_get_pc_thunk.%s",
-		     reg_names[REGNO (got_register_rtx)] + 1);
-	  else
-	    ASM_GENERATE_INTERNAL_LABEL (name, "LADDPC",
-					 REGNO (got_register_rtx));
-
+	  get_pc_thunk_name (name, GLOBAL_OFFSET_TABLE_REGNUM);
 	  got_helper_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (name));
 	}
 
-      insn
-	= gen_load_pcrel_sym (got_register_rtx, sparc_got (), got_helper_rtx);
+      emit_insn (gen_load_pcrel_sym (got_register_rtx, sparc_got (),
+				     got_helper_rtx));
     }
-
-  emit_insn (insn);
 }
 
 /* Ensure that we are not using patterns that are not OK with PIC.  */
@@ -5464,7 +5442,7 @@
     return true;
 
   /* GOT register (%l7) if needed.  */
-  if (got_register_rtx && regno == REGNO (got_register_rtx))
+  if (regno == GLOBAL_OFFSET_TABLE_REGNUM && got_register_rtx)
     return true;
 
   /* If the function accesses prior frames, the frame pointer and the return
@@ -12507,9 +12485,10 @@
 sparc_file_end (void)
 {
   /* If we need to emit the special GOT helper function, do so now.  */
-  if (got_helper_needed)
+  if (got_helper_rtx)
     {
       const char *name = XSTR (got_helper_rtx, 0);
+      const char *reg_name = reg_names[GLOBAL_OFFSET_TABLE_REGNUM];
 #ifdef DWARF2_UNWIND_INFO
       bool do_cfi;
 #endif
@@ -12546,22 +12525,17 @@
 #ifdef DWARF2_UNWIND_INFO
       do_cfi = dwarf2out_do_cfi_asm ();
       if (do_cfi)
-	output_asm_insn (".cfi_startproc", NULL);
+	fprintf (asm_out_file, "\t.cfi_startproc\n");
 #endif
       if (flag_delayed_branch)
-	{
-	  output_asm_insn ("jmp\t%%o7+8", NULL);
-	  output_asm_insn (" add\t%%o7, %0, %0", &got_register_rtx);
-	}
+	fprintf (asm_out_file, "\tjmp\t%%o7+8\n\t add\t%%o7, %s, %s\n",
+		 reg_name, reg_name);
       else
-	{
-	  output_asm_insn ("add\t%%o7, %0, %0", &got_register_rtx);
-	  output_asm_insn ("jmp\t%%o7+8", NULL);
-	  output_asm_insn (" nop", NULL);
-	}
+	fprintf (asm_out_file, "\tadd\t%%o7, %s, %s\n\tjmp\t%%o7+8\n\t nop\n",
+		 reg_name, reg_name);
 #ifdef DWARF2_UNWIND_INFO
       if (do_cfi)
-	output_asm_insn (".cfi_endproc", NULL);
+	fprintf (asm_out_file, "\t.cfi_endproc\n");
 #endif
     }
 
@@ -13056,10 +13030,7 @@
   edge entry_edge;
   rtx_insn *seq;
 
-  /* In PIC mode, we need to always initialize the PIC register if optimization
-     is enabled, because we are called from IRA and LRA may later force things
-     to the constant pool for optimization purposes.  */
-  if (!flag_pic || (!crtl->uses_pic_offset_table && !optimize))
+  if (!crtl->uses_pic_offset_table)
     return;
 
   start_sequence ();
diff -Nur gcc-10.3.0.orig/gcc/config/sparc/sparc.md gcc-10.3.0/gcc/config/sparc/sparc.md
--- gcc-10.3.0.orig/gcc/config/sparc/sparc.md	2021-04-08 13:56:28.205742322 +0200
+++ gcc-10.3.0/gcc/config/sparc/sparc.md	2022-01-24 10:19:54.504102046 +0100
@@ -1601,7 +1601,10 @@
    (clobber (reg:P O7_REG))]
   "REGNO (operands[0]) == INTVAL (operands[3])"
 {
-  return output_load_pcrel_sym (operands);
+  if (flag_delayed_branch)
+    return "sethi\t%%hi(%a1-4), %0\n\tcall\t%a2\n\t add\t%0, %%lo(%a1+4), %0";
+  else
+    return "sethi\t%%hi(%a1-8), %0\n\tadd\t%0, %%lo(%a1-4), %0\n\tcall\t%a2\n\t nop";
 }
   [(set (attr "type") (const_string "multi"))
    (set (attr "length")
diff -Nur gcc-10.3.0.orig/gcc/config/sparc/sparc-protos.h gcc-10.3.0/gcc/config/sparc/sparc-protos.h
--- gcc-10.3.0.orig/gcc/config/sparc/sparc-protos.h	2021-04-08 13:56:28.201742273 +0200
+++ gcc-10.3.0/gcc/config/sparc/sparc-protos.h	2022-01-24 10:19:54.548100968 +0100
@@ -69,7 +69,6 @@
 extern void sparc_split_mem_reg (rtx, rtx, machine_mode);
 extern int sparc_split_reg_reg_legitimate (rtx, rtx);
 extern void sparc_split_reg_reg (rtx, rtx, machine_mode);
-extern const char *output_load_pcrel_sym (rtx *);
 extern const char *output_ubranch (rtx, rtx_insn *);
 extern const char *output_cbranch (rtx, rtx, int, int, int, rtx_insn *);
 extern const char *output_return (rtx_insn *);
diff -Nur gcc-10.3.0.orig/gcc/testsuite/gcc.c-torture/compile/20191108-1.c gcc-10.3.0/gcc/testsuite/gcc.c-torture/compile/20191108-1.c
--- gcc-10.3.0.orig/gcc/testsuite/gcc.c-torture/compile/20191108-1.c	2021-04-08 13:56:28.929751064 +0200
+++ gcc-10.3.0/gcc/testsuite/gcc.c-torture/compile/20191108-1.c	1970-01-01 01:00:00.000000000 +0100
@@ -1,14 +0,0 @@
-/* PR target/92095 */
-/* Testcase by Sergei Trofimovich <slyfox@inbox.ru> */
-
-typedef union {
-  double a;
-  int b[2];
-} c;
-
-double d(int e)
-{
-  c f;
-  (&f)->b[0] = 15728640;
-  return e ? -(&f)->a : (&f)->a;
-}
diff -Nur gcc-10.3.0.orig/gcc/testsuite/gcc.target/sparc/overflow-3.c gcc-10.3.0/gcc/testsuite/gcc.target/sparc/overflow-3.c
--- gcc-10.3.0.orig/gcc/testsuite/gcc.target/sparc/overflow-3.c	2021-04-08 13:56:29.453757389 +0200
+++ gcc-10.3.0/gcc/testsuite/gcc.target/sparc/overflow-3.c	2022-01-24 10:19:54.688097536 +0100
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O -fno-pie" } */
+/* { dg-options "-O" } */
 
 #include <stdbool.h>
 #include <stdint.h>
diff -Nur gcc-10.3.0.orig/gcc/testsuite/gcc.target/sparc/overflow-4.c gcc-10.3.0/gcc/testsuite/gcc.target/sparc/overflow-4.c
--- gcc-10.3.0.orig/gcc/testsuite/gcc.target/sparc/overflow-4.c	2021-04-08 13:56:29.453757389 +0200
+++ gcc-10.3.0/gcc/testsuite/gcc.target/sparc/overflow-4.c	2022-01-24 10:19:55.336081656 +0100
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O -fno-pie -mno-vis3 -mno-vis4" } */
+/* { dg-options "-O -mno-vis3 -mno-vis4" } */
 
 #include <stdbool.h>
 #include <stdint.h>
diff -Nur gcc-10.3.0.orig/gcc/testsuite/gcc.target/sparc/overflow-5.c gcc-10.3.0/gcc/testsuite/gcc.target/sparc/overflow-5.c
--- gcc-10.3.0.orig/gcc/testsuite/gcc.target/sparc/overflow-5.c	2021-04-08 13:56:29.453757389 +0200
+++ gcc-10.3.0/gcc/testsuite/gcc.target/sparc/overflow-5.c	2022-01-24 10:19:55.336081656 +0100
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O -fno-pie -mvis3" } */
+/* { dg-options "-O -mvis3" } */
 
 #include <stdbool.h>
 #include <stdint.h>