From da66b64a18414d5ece52512eb016c1af2ede1730 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Mon, 8 Dec 2025 14:36:06 -0800
Subject: [PATCH] merge revision(s) 9d44cb0b2b5520b2b299851003ca2a97bf1e2079,
 367ddd445cdf5ccc55a0481c944746ef595f72f7,
 48dce7874fcb571765635b32fa6a3e3a12e228f8: [Backport #21655]

	[PATCH] Remove rbimpl_rstring_getmem() usage as workaround for GCC 15.2.1 optimization bug. [Bug #21655]

	[PATCH] include/ruby/internal/core/rstring.h: Remove rbimpl_rstring_getmem() definition.

	[PATCH] simplify RSRING_GETMEM() definition.
---
 include/ruby/internal/core/rstring.h | 57 +++++-----------------------
 version.h                            |  2 +-
 2 files changed, 10 insertions(+), 49 deletions(-)

diff --git a/include/ruby/internal/core/rstring.h b/include/ruby/internal/core/rstring.h
index 9cf9daa97c..35175ea94a 100644
--- a/include/ruby/internal/core/rstring.h
+++ b/include/ruby/internal/core/rstring.h
@@ -369,41 +369,6 @@ RSTRING_LEN(VALUE str)
     return RSTRING(str)->len;
 }
 
-RBIMPL_WARNING_PUSH()
-#if RBIMPL_COMPILER_IS(Intel)
-RBIMPL_WARNING_IGNORED(413)
-#endif
-
-RBIMPL_ATTR_PURE_UNLESS_DEBUG()
-RBIMPL_ATTR_ARTIFICIAL()
-/**
- * @private
- *
- * "Expands" an embedded  string into an ordinal one.  This  is a function that
- * returns aggregated type.   The returned struct always  has its `as.heap.len`
- * an `as.heap.ptr` fields set appropriately.
- *
- * This is an implementation detail that 3rd parties should never bother.
- */
-static inline struct RString
-rbimpl_rstring_getmem(VALUE str)
-{
-    RBIMPL_ASSERT_TYPE(str, RUBY_T_STRING);
-
-    if (RB_FL_ANY_RAW(str, RSTRING_NOEMBED)) {
-        return *RSTRING(str);
-    }
-    else {
-        /* Expecting compilers to optimize this on-stack struct away. */
-        struct RString retval = {RBASIC_INIT};
-        retval.len = RSTRING_LEN(str);
-        retval.as.heap.ptr = RSTRING(str)->as.embed.ary;
-        return retval;
-    }
-}
-
-RBIMPL_WARNING_POP()
-
 RBIMPL_ATTR_ARTIFICIAL()
 /**
  * Queries the contents pointer of the string.
@@ -415,7 +380,9 @@ RBIMPL_ATTR_ARTIFICIAL()
 static inline char *
 RSTRING_PTR(VALUE str)
 {
-    char *ptr = rbimpl_rstring_getmem(str).as.heap.ptr;
+    char *ptr = RB_FL_TEST_RAW(str, RSTRING_NOEMBED) ?
+        RSTRING(str)->as.heap.ptr :
+        RSTRING(str)->as.embed.ary;
 
     if (RUBY_DEBUG && RB_UNLIKELY(! ptr)) {
         /* :BEWARE: @shyouhei thinks  that currently, there are  rooms for this
@@ -441,14 +408,17 @@ RBIMPL_ATTR_ARTIFICIAL()
 static inline char *
 RSTRING_END(VALUE str)
 {
-    struct RString buf = rbimpl_rstring_getmem(str);
+    char *ptr = RB_FL_TEST_RAW(str, RSTRING_NOEMBED) ?
+        RSTRING(str)->as.heap.ptr :
+        RSTRING(str)->as.embed.ary;
+    long len = RSTRING_LEN(str);
 
-    if (RUBY_DEBUG && RB_UNLIKELY(! buf.as.heap.ptr)) {
+    if (RUBY_DEBUG && RB_UNLIKELY(!ptr)) {
         /* Ditto. */
         rb_debug_rstring_null_ptr("RSTRING_END");
     }
 
-    return &buf.as.heap.ptr[buf.len];
+    return &ptr[len];
 }
 
 RBIMPL_ATTR_ARTIFICIAL()
@@ -477,16 +447,7 @@ RSTRING_LENINT(VALUE str)
  * @param  ptrvar  Variable where its contents is stored.
  * @param  lenvar  Variable where its length is stored.
  */
-#ifdef HAVE_STMT_AND_DECL_IN_EXPR
-# define RSTRING_GETMEM(str, ptrvar, lenvar) \
-    __extension__ ({ \
-        struct RString rbimpl_str = rbimpl_rstring_getmem(str); \
-        (ptrvar) = rbimpl_str.as.heap.ptr; \
-        (lenvar) = rbimpl_str.len; \
-    })
-#else
 # define RSTRING_GETMEM(str, ptrvar, lenvar) \
     ((ptrvar) = RSTRING_PTR(str),           \
      (lenvar) = RSTRING_LEN(str))
-#endif /* HAVE_STMT_AND_DECL_IN_EXPR */
 #endif /* RBIMPL_RSTRING_H */
diff --git a/version.h b/version.h
index dfe52b60d8..c29c95bcc7 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 7
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 64
+#define RUBY_PATCHLEVEL 65
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"