From: Victor Do Nascimento <victor.donascimento@arm.com>
Date: Fri, 7 Jul 2023 12:08:45 +0000 (+0100)
Subject: aarch64: Add basic target_print_operand support for CONST_STRING
X-Git-Tag: basepoints/gcc-15~5170
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=372e2d62bcb27287234f30908af167886611c12a;p=thirdparty%2Fgcc.git

aarch64: Add basic target_print_operand support for CONST_STRING

Motivated by the need to print system register names in output
assembly, this patch adds the required logic to
`aarch64_print_operand' to accept rtxs of type CONST_STRING and
process these accordingly.

Consequently, an rtx such as:

  (set (reg/i:DI 0 x0)
         (unspec:DI [(const_string ("s3_3_c13_c2_2"))])

can now be output correctly using the following output pattern when
composing `define_insn's:

  "mrs\t%x0, %1"

gcc/ChangeLog

	* config/aarch64/aarch64.cc (aarch64_print_operand): Add
	support for CONST_STRING.
---

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 91e4d2358917..5fd7063663c6 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -12366,6 +12366,11 @@ aarch64_print_operand (FILE *f, rtx x, int code)
 
       switch (GET_CODE (x))
 	{
+	case CONST_STRING:
+	  {
+	    asm_fprintf (f, "%s", XSTR (x, 0));
+	    break;
+	  }
 	case REG:
 	  if (aarch64_sve_data_mode_p (GET_MODE (x)))
 	    {