[gcc r10-7037] print-rtl: Fix printing of CONST_STRING in DEBUG_INSNs [PR93399]

[Jakub Jelinek]

https://gcc.gnu.org/g:febfe87d80c5bc8afd9038136ae7c09910a0d883

commit r10-7037-gfebfe87d80c5bc8afd9038136ae7c09910a0d883
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Mar 5 09:12:44 2020 +0100

    print-rtl: Fix printing of CONST_STRING in DEBUG_INSNs [PR93399]
    
    The following testcase fails to assemble, as CONST_STRING in the DEBUG_INSNs
    is printed as is, so if it contains \n and/or \r, we are in trouble:
            .loc 1 14 3
            # DEBUG haystack => [si]
            # DEBUG needle => "
    "
    In the gimple dumps we print those (STRING_CSTs) as
      # DEBUG haystack => D#1
      # DEBUG needle => "\n"
    so this patch uses what we use in tree printing for the CONST_STRINGs too.
    
    2020-03-05  Jakub Jelinek  <jakub@redhat.com>
    
    	PR middle-end/93399
    	* tree-pretty-print.h (pretty_print_string): Declare.
    	* tree-pretty-print.c (pretty_print_string): Remove forward
    	declaration, no longer static.  Change nbytes parameter type
    	from unsigned to size_t.
    	* print-rtl.c (print_value) <case CONST_STRING>: Use
    	pretty_print_string and for shrink way too long strings.
    
    	* gcc.dg/pr93399.c: New test.

Diff:
---
 gcc/ChangeLog                  | 10 ++++++++++
 gcc/print-rtl.c                |  4 +++-
 gcc/testsuite/ChangeLog        |  3 +++
 gcc/testsuite/gcc.dg/pr93399.c | 17 +++++++++++++++++
 gcc/tree-pretty-print.c        |  5 ++---
 gcc/tree-pretty-print.h        |  1 +
 6 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 897c598..db58bbe 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2020-03-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/93399
+	* tree-pretty-print.h (pretty_print_string): Declare.
+	* tree-pretty-print.c (pretty_print_string): Remove forward
+	declaration, no longer static.  Change nbytes parameter type
+	from unsigned to size_t.
+	* print-rtl.c (print_value) <case CONST_STRING>: Use
+	pretty_print_string and for shrink way too long strings.
+
 2020-03-05  Richard Biener  <rguenther@suse.de>
 	    Jakub Jelinek  <jakub@redhat.com>
 
diff --git a/gcc/print-rtl.c b/gcc/print-rtl.c
index 653e9c6..611ea07 100644
--- a/gcc/print-rtl.c
+++ b/gcc/print-rtl.c
@@ -1685,7 +1685,9 @@ print_value (pretty_printer *pp, const_rtx x, int verbose)
       pp_string (pp, tmp);
       break;
     case CONST_STRING:
-      pp_printf (pp, "\"%s\"", XSTR (x, 0));
+      pp_string (pp, "\"");
+      pretty_print_string (pp, XSTR (x, 0), strlen (XSTR (x, 0)));
+      pp_string (pp, "\"");
       break;
     case SYMBOL_REF:
       pp_printf (pp, "`%s'", XSTR (x, 0));
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d4e7a3a..5b94ab5 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2020-03-05  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/93399
+	* gcc.dg/pr93399.c: New test.
+
 	PR tree-optimization/93582
 	* gcc.dg/tree-ssa/pr93582-11.c: New test.
 
diff --git a/gcc/testsuite/gcc.dg/pr93399.c b/gcc/testsuite/gcc.dg/pr93399.c
new file mode 100644
index 0000000..3d92990
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr93399.c
@@ -0,0 +1,17 @@
+/* PR middle-end/93399 */
+/* { dg-do assemble } */
+/* { dg-options "-fverbose-asm -dA -g -O3" } */
+
+extern inline __attribute__ ((__always_inline__, __gnu_inline__)) char *
+strstr (const char *haystack, const char *needle)
+{
+  return __builtin_strstr (haystack, needle);
+}
+
+int
+main (int argc, const char **argv)
+{
+  char *substr = strstr (argv[0], "\n");
+  char *another = strstr (argv[0], "\r\n");
+  return 0;
+}
diff --git a/gcc/tree-pretty-print.c b/gcc/tree-pretty-print.c
index 7de8c7b..885ca8c 100644
--- a/gcc/tree-pretty-print.c
+++ b/gcc/tree-pretty-print.c
@@ -45,7 +45,6 @@ along with GCC; see the file COPYING3.  If not see
 
 /* Local functions, macros and variables.  */
 static const char *op_symbol (const_tree);
-static void pretty_print_string (pretty_printer *, const char*, unsigned);
 static void newline_and_indent (pretty_printer *, int);
 static void maybe_init_pretty_print (FILE *);
 static void print_struct_decl (pretty_printer *, const_tree, int, dump_flags_t);
@@ -4216,8 +4215,8 @@ print_call_name (pretty_printer *pp, tree node, dump_flags_t flags)
 /* Print the first N characters in the array STR, replacing non-printable
    characters (including embedded nuls) with unambiguous escape sequences.  */
 
-static void
-pretty_print_string (pretty_printer *pp, const char *str, unsigned n)
+void
+pretty_print_string (pretty_printer *pp, const char *str, size_t n)
 {
   if (str == NULL)
     return;
diff --git a/gcc/tree-pretty-print.h b/gcc/tree-pretty-print.h
index 49b04d4..33a2d40 100644
--- a/gcc/tree-pretty-print.h
+++ b/gcc/tree-pretty-print.h
@@ -47,6 +47,7 @@ extern void print_declaration (pretty_printer *, tree, int, dump_flags_t);
 extern int op_code_prio (enum tree_code);
 extern int op_prio (const_tree);
 extern const char *op_symbol_code (enum tree_code);
+extern void pretty_print_string (pretty_printer *, const char *, size_t);
 extern void print_call_name (pretty_printer *, tree, dump_flags_t);
 extern void percent_K_format (text_info *, location_t, tree);
 extern void pp_tree_identifier (pretty_printer *, tree);