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[v2,1/2] LoongArch: Add the macro implementation of mcmodel=extreme.

Message ID 20240105034021.30177-2-chenglulu@loongson.cn
State New
Headers show
Series When cmodel=extreme, add macro support and only support macros. | expand

Commit Message

Lulu Cheng Jan. 5, 2024, 3:40 a.m. UTC 
gcc/ChangeLog:

	* config/loongarch/loongarch.cc (loongarch_symbolic_constant_p):
	Remove the sym+addend form from the SYMBOL_PCREL64 type symbol.
	(loongarch_output_mi_thunk): Add code model extreme support.
	(loongarch_option_override_internal): Supports option combinations
	of -cmodel=extreme and -mexplicit-relocs=none.
	(loongarch_handle_model_attribute): Remove detection code.
	* config/loongarch/loongarch.md (movdi_pcrel64): New templated.
	(movdi_got_disp): Likewise.
	* config/loongarch/predicates.md (symbolic_got_operand): Determine
	whether the symbol type is SYMBOL_GOT_DISP.
	(symbolic_pcrel64_operand): Determine whether the symbol type is
	SYMBOL_PCREL64.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/func-call-extreme-5.c: New test.
	* gcc.target/loongarch/func-call-extreme-6.c: New test.
---
 gcc/config/loongarch/loongarch.cc             | 28 +++++------
 gcc/config/loongarch/loongarch.md             | 50 +++++++++++++++++++
 gcc/config/loongarch/predicates.md            | 14 ++++++
 .../loongarch/func-call-extreme-5.c           |  7 +++
 .../loongarch/func-call-extreme-6.c           |  7 +++
 5 files changed, 91 insertions(+), 15 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-extreme-5.c
 create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-extreme-6.c
diff mbox series

Patch

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 28d64135c54..6a3321327ea 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -1944,10 +1944,10 @@  loongarch_symbolic_constant_p (rtx x, enum loongarch_symbol_type *symbol_type)
     case SYMBOL_TLSGD:
     case SYMBOL_TLSLDM:
     case SYMBOL_PCREL:
-    case SYMBOL_PCREL64:
       /* GAS rejects offsets outside the range [-2^31, 2^31-1].  */
       return sext_hwi (INTVAL (offset), 32) == INTVAL (offset);
 
+    case SYMBOL_PCREL64:
     case SYMBOL_GOT_DISP:
     case SYMBOL_TLS:
       return false;
@@ -7450,12 +7450,22 @@  loongarch_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
      allowed, otherwise load the address into a register first.  */
   if (use_sibcall_p)
     {
-      insn = emit_call_insn (gen_sibcall_internal (fnaddr, const0_rtx));
+      if (TARGET_CMODEL_EXTREME)
+	{
+	  emit_insn (gen_movdi_pcrel64 (temp1, fnaddr, temp2));
+	  insn = emit_call_insn (gen_sibcall_internal (temp1, const0_rtx));
+	}
+      else
+	insn = emit_call_insn (gen_sibcall_internal (fnaddr, const0_rtx));
       SIBLING_CALL_P (insn) = 1;
     }
   else
     {
-      loongarch_emit_move (temp1, fnaddr);
+      if (TARGET_CMODEL_EXTREME)
+	emit_insn (gen_movdi_pcrel64 (temp1, fnaddr, temp2));
+      else
+	loongarch_emit_move (temp1, fnaddr);
+
       emit_jump_insn (gen_indirect_jump (temp1));
     }
 
@@ -7583,10 +7593,6 @@  loongarch_option_override_internal (struct gcc_options *opts,
   switch (la_target.cmodel)
     {
       case CMODEL_EXTREME:
-	if (la_opt_explicit_relocs == EXPLICIT_RELOCS_NONE)
-	  error ("code model %qs is not compatible with %s",
-		 "extreme", "-mexplicit-relocs=none");
-
 	if (opts->x_flag_plt)
 	  {
 	    if (global_options_set.x_flag_plt)
@@ -7951,14 +7957,6 @@  loongarch_handle_model_attribute (tree *node, tree name, tree arg, int,
 	  *no_add_attrs = true;
 	  return NULL_TREE;
 	}
-      if (la_opt_explicit_relocs == EXPLICIT_RELOCS_NONE)
-	{
-	  error_at (DECL_SOURCE_LOCATION (decl),
-		    "%qE attribute is not compatible with %s", name,
-		    "-mexplicit-relocs=none");
-	  *no_add_attrs = true;
-	  return NULL_TREE;
-	}
 
       arg = TREE_VALUE (arg);
       if (TREE_CODE (arg) != STRING_CST)
diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index d1f5b94f5d6..c0365dc9e99 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -85,6 +85,9 @@  (define_c_enum "unspec" [
 
   UNSPEC_SIBCALL_VALUE_MULTIPLE_INTERNAL_1
   UNSPEC_CALL_VALUE_MULTIPLE_INTERNAL_1
+
+  UNSPEC_MOV_PCREL64
+  UNSPEC_MOV_GOT_DISP
 ])
 
 (define_c_enum "unspecv" [
@@ -2057,6 +2060,25 @@  (define_expand "movdi"
 {
   if (loongarch_legitimize_move (DImode, operands[0], operands[1]))
     DONE;
+
+  enum loongarch_symbol_type symbol_type;
+  if (loongarch_symbolic_constant_p (operands[1], &symbol_type))
+    {
+      if (symbol_type == SYMBOL_PCREL64)
+	{
+	  gcc_assert (can_create_pseudo_p ());
+	  emit_insn (gen_movdi_pcrel64 (operands[0], operands[1],
+					gen_reg_rtx (DImode)));
+	  DONE;
+	}
+      else if (TARGET_CMODEL_EXTREME && symbol_type == SYMBOL_GOT_DISP)
+       {
+	  gcc_assert (can_create_pseudo_p ());
+	  emit_insn (gen_movdi_got_disp (operands[0], operands[1],
+					 gen_reg_rtx (DImode)));
+	  DONE;
+       }
+    }
 })
 
 (define_insn_and_split "*movdi_32bit"
@@ -2097,6 +2119,34 @@  (define_insn_and_split "*movdi_64bit"
   [(set_attr "move_type" "move,const,load,store,mgtf,fpload,mftg,fpstore")
    (set_attr "mode" "DI")])
 
+;; Use two registers to get the local symbol address.
+;; la.local rd, rt, sym
+
+(define_insn "movdi_pcrel64"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+       (match_operand:DI 1 "symbolic_pcrel64_operand"))
+  (unspec:DI [(const_int 0)]
+    UNSPEC_MOV_PCREL64)
+  (clobber (match_operand:DI 2 "register_operand" "=&r"))]
+ "TARGET_64BIT"
+ "la.local\t%0,%2,%1"
+ [(set_attr "mode" "DI")
+  (set_attr "length" "5")])
+
+;; Use two registers to get the global symbol address from the got table.
+;; la.global rd, rt, sym
+
+(define_insn "movdi_got_disp"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+       (match_operand:DI 1 "symbolic_got_operand"))
+  (unspec:DI [(const_int 0)]
+    UNSPEC_MOV_GOT_DISP)
+  (clobber (match_operand:DI 2 "register_operand" "=&r"))]
+ "TARGET_64BIT && TARGET_CMODEL_EXTREME"
+ "la.global\t%0,%2,%1"
+ [(set_attr "mode" "DI")
+  (set_attr "length" "5")])
+
 ;; 32-bit Integer moves
 
 (define_expand "movsi"
diff --git a/gcc/config/loongarch/predicates.md b/gcc/config/loongarch/predicates.md
index ba5336cfb3e..d136dcc1c03 100644
--- a/gcc/config/loongarch/predicates.md
+++ b/gcc/config/loongarch/predicates.md
@@ -592,6 +592,20 @@  (define_predicate "mem_simple_ldst_operand"
 	  || symbolic_pcrel_offset_operand (op, Pmode));
 })
 
+(define_predicate "symbolic_got_operand"
+  (match_code "const,symbol_ref,label_ref")
+{
+  enum loongarch_symbol_type type;
+  return loongarch_symbolic_constant_p (op, &type) && type == SYMBOL_GOT_DISP;
+})
+
+(define_predicate "symbolic_pcrel64_operand"
+  (match_code "const,symbol_ref,label_ref")
+{
+  enum loongarch_symbol_type type;
+  return loongarch_symbolic_constant_p (op, &type) && type == SYMBOL_PCREL64;
+})
+
 (define_predicate "equality_operator"
   (match_code "eq,ne"))
 
diff --git a/gcc/testsuite/gcc.target/loongarch/func-call-extreme-5.c b/gcc/testsuite/gcc.target/loongarch/func-call-extreme-5.c
new file mode 100644
index 00000000000..8ecf5bc7525
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/func-call-extreme-5.c
@@ -0,0 +1,7 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mabi=lp64d -O0 -fpic -fno-plt -mexplicit-relocs=none -mcmodel=extreme" } */
+/* { dg-final { scan-assembler "test:.*la.global.*,\\\$r15,g" } } */
+/* { dg-final { scan-assembler "test1:.*la.global.*,\\\$r15,f" } } */
+/* { dg-final { scan-assembler "test2:.*la.local.*,\\\$r15,l" } } */
+
+#include "func-call-extreme-1.c"
diff --git a/gcc/testsuite/gcc.target/loongarch/func-call-extreme-6.c b/gcc/testsuite/gcc.target/loongarch/func-call-extreme-6.c
new file mode 100644
index 00000000000..81830d4d215
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/func-call-extreme-6.c
@@ -0,0 +1,7 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mabi=lp64d -O0 -fno-pic -fno-plt -mexplicit-relocs=none -mcmodel=extreme" } */
+/* { dg-final { scan-assembler "test:.*la.global.*,\\\$r15,g" } } */
+/* { dg-final { scan-assembler "test1:.*la.local.*,\\\$r15,f" } } */
+/* { dg-final { scan-assembler "test2:.*la.local.*,\\\$r15,l" } } */
+
+#include "func-call-extreme-1.c"