[PATCH v1] LoongArch: Fixed a compilation failure with '%c' in inline assembly [PR107731].

[Lulu Cheng <chenglulu@loongson.cn>]

gcc/ChangeLog:

	* config/loongarch/loongarch.cc (loongarch_classify_address):
	Add precessint for CONST_INT.
	(loongarch_print_operand): Increase the processing of '%c'.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/tst-asm-const.c: Moved to...
	* gcc.target/loongarch/pr107731.c: ...here.
---
 gcc/config/loongarch/loongarch.cc                  | 14 ++++++++++++++
 .../loongarch/{tst-asm-const.c => pr107731.c}      |  6 +++---
 2 files changed, 17 insertions(+), 3 deletions(-)
 rename gcc/testsuite/gcc.target/loongarch/{tst-asm-const.c => pr107731.c} (78%)

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 8d5d8d965dd..7f02b0bab23 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -2029,6 +2029,11 @@ loongarch_classify_address (struct loongarch_address_info *info, rtx x,
       return (loongarch_valid_base_register_p (info->reg, mode, strict_p)
 	      && loongarch_valid_lo_sum_p (info->symbol_type, mode,
 					   info->offset));
+    case CONST_INT:
+      /* Small-integer addresses don't occur very often, but they
+	 are legitimate if $r0 is a valid base register.  */
+      info->type = ADDRESS_CONST_INT;
+      return IMM12_OPERAND (INTVAL (x));
 
     default:
       return false;
@@ -4889,6 +4894,7 @@ loongarch_print_operand_reloc (FILE *file, rtx op, bool hi64_part,
 
    'A'	Print a _DB suffix if the memory model requires a release.
    'b'	Print the address of a memory operand, without offset.
+   'c'  print an integer.
    'C'	Print the integer branch condition for comparison OP.
    'd'	Print CONST_INT OP in decimal.
    'F'	Print the FPU branch condition for comparison OP.
@@ -4935,6 +4941,14 @@ loongarch_print_operand (FILE *file, rtx op, int letter)
        fputs ("_db", file);
       break;
 
+    case 'c':
+      if (CONST_INT_P (op))
+	fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (op));
+      else
+	output_operand_lossage ("unsupported operand for code '%c'", letter);
+
+      break;
+
     case 'C':
       loongarch_print_int_branch_condition (file, code, letter);
       break;
diff --git a/gcc/testsuite/gcc.target/loongarch/tst-asm-const.c b/gcc/testsuite/gcc.target/loongarch/pr107731.c
similarity index 78%
rename from gcc/testsuite/gcc.target/loongarch/tst-asm-const.c
rename to gcc/testsuite/gcc.target/loongarch/pr107731.c
index 2e04b99e301..80d84c48c6e 100644
--- a/gcc/testsuite/gcc.target/loongarch/tst-asm-const.c
+++ b/gcc/testsuite/gcc.target/loongarch/pr107731.c
@@ -1,13 +1,13 @@
-/* Test asm const. */
 /* { dg-do compile } */
 /* { dg-final { scan-assembler-times "foo:.*\\.long 1061109567.*\\.long 52" 1 } } */
+
 int foo ()
 {
   __asm__ volatile (
           "foo:"
           "\n\t"
-	  ".long %a0\n\t"
-	  ".long %a1\n\t"
+	  ".long %c0\n\t"
+	  ".long %c1\n\t"
 	  :
 	  :"i"(0x3f3f3f3f), "i"(52)
 	  :
-- 
2.31.1