LoongArch: Added support for loading __get_tls_addr symbol address using call36.

gcc/ChangeLog:

	* config/loongarch/loongarch.cc (loongarch_call_tls_get_addr):
	Add support for call36.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c: New test.

Author: chenglulu326

gcc/config/loongarch/loongarch.cc

@@ -2807,17 +2807,27 @@ loongarch_call_tls_get_addr (rtx sym, enum loongarch_symbol_type type, rtx v0)
 
 	case CMODEL_MEDIUM:
 	    {
-	      rtx reg = gen_reg_rtx (Pmode);
 	      if (la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE)
 		{
-		  emit_insn (gen_pcalau12i (Pmode, reg, loongarch_tls_symbol));
-		  rtx call = gen_call_value_internal_1 (Pmode, v0, reg,
-							loongarch_tls_symbol,
-							const0_rtx);
-		  insn = emit_call_insn (call);
+		  rtx call;
+
+		 if (HAVE_AS_SUPPORT_CALL36)
+		   call = gen_call_value_internal (v0, loongarch_tls_symbol,
+						   const0_rtx);
+		 else
+		   {
+		     rtx reg = gen_reg_rtx (Pmode);
+		     emit_insn (gen_pcalau12i (Pmode, reg,
+					       loongarch_tls_symbol));
+		     call = gen_call_value_internal_1 (Pmode, v0, reg,
+						       loongarch_tls_symbol,
+						       const0_rtx);
+		   }
+		 insn = emit_call_insn (call);
 		}
 	      else
 		{
+		  rtx reg = gen_reg_rtx (Pmode);
 		  emit_move_insn (reg, loongarch_tls_symbol);
 		  insn = emit_call_insn (gen_call_value_internal (v0,
 								  reg,

gcc/testsuite/gcc.target/loongarch/explicit-relocs-medium-call36-auto-tls-ld-gd.c

@@ -0,0 +1,5 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -mexplicit-relocs=auto -mcmodel=medium -fplt" } */
+/* { dg-final { scan-assembler "pcaddu18i\t\\\$r1,%call36\\\(__tls_get_addr\\\)" { target { tls_native && loongarch_call36_support } } } } */
+
+#include "./explicit-relocs-auto-tls-ld-gd.c"