[loong][mips][regexp] Fix stack growth for global regexps

Port commit 3e3a027d

Beside, some registers are changed to callee-saved, and the previous
related save and restore operations are removed.

Bug: v8:11382

Change-Id: Ic3161f8173771c1b7c190c77cbaf2534f52ec422
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3281673Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Auto-Submit: Liu yu <liuyu@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#77902}

src/regexp/loong64/regexp-macro-assembler-loong64.h

@@ -151,13 +151,13 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerLOONG64
 
   // Register holding the current input position as negative offset from
   // the end of the string.
-  static constexpr Register current_input_offset() { return a6; }
+  static constexpr Register current_input_offset() { return s2; }
 
   // The register containing the current character after LoadCurrentCharacter.
-  static constexpr Register current_character() { return a7; }
+  static constexpr Register current_character() { return s5; }
 
   // Register holding address of the end of the input string.
-  static constexpr Register end_of_input_address() { return t2; }
+  static constexpr Register end_of_input_address() { return s6; }
 
   // Register holding the frame address. Local variables, parameters and
   // regexp registers are addressed relative to this.
@@ -165,10 +165,10 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerLOONG64
 
   // The register containing the backtrack stack top. Provides a meaningful
   // name to the register.
-  static constexpr Register backtrack_stackpointer() { return t0; }
+  static constexpr Register backtrack_stackpointer() { return s7; }
 
   // Register holding pointer to the current code object.
-  static constexpr Register code_pointer() { return a5; }
+  static constexpr Register code_pointer() { return s1; }
 
   // Byte size of chars in the string to match (decided by the Mode argument).
   inline int char_size() { return static_cast<int>(mode_); }
@@ -195,8 +195,8 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerLOONG64
 
   void LoadRegExpStackPointerFromMemory(Register dst);
   void StoreRegExpStackPointerToMemory(Register src, Register scratch);
-  void PushRegExpBasePointer(Register scratch1, Register scratch2);
-  void PopRegExpBasePointer(Register scratch1, Register scratch2);
+  void PushRegExpBasePointer(Register stack_pointer, Register scratch);
+  void PopRegExpBasePointer(Register stack_pointer_out, Register scratch);
 
   Isolate* isolate() const { return masm_->isolate(); }
 

src/regexp/mips/regexp-macro-assembler-mips.h

@@ -147,13 +147,13 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerMIPS
 
   // Register holding the current input position as negative offset from
   // the end of the string.
-  static constexpr Register current_input_offset() { return t2; }
+  static constexpr Register current_input_offset() { return s2; }
 
   // The register containing the current character after LoadCurrentCharacter.
-  static constexpr Register current_character() { return t3; }
+  static constexpr Register current_character() { return s5; }
 
   // Register holding address of the end of the input string.
-  static constexpr Register end_of_input_address() { return t6; }
+  static constexpr Register end_of_input_address() { return s6; }
 
   // Register holding the frame address. Local variables, parameters and
   // regexp registers are addressed relative to this.
@@ -161,10 +161,10 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerMIPS
 
   // The register containing the backtrack stack top. Provides a meaningful
   // name to the register.
-  static constexpr Register backtrack_stackpointer() { return t4; }
+  static constexpr Register backtrack_stackpointer() { return s7; }
 
   // Register holding pointer to the current code object.
-  static constexpr Register code_pointer() { return t1; }
+  static constexpr Register code_pointer() { return s1; }
 
   // Byte size of chars in the string to match (decided by the Mode argument).
   inline int char_size() const { return static_cast<int>(mode_); }
@@ -195,8 +195,8 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerMIPS
 
   void LoadRegExpStackPointerFromMemory(Register dst);
   void StoreRegExpStackPointerToMemory(Register src, Register scratch);
-  void PushRegExpBasePointer(Register scratch1, Register scratch2);
-  void PopRegExpBasePointer(Register scratch1, Register scratch2);
+  void PushRegExpBasePointer(Register stack_pointer, Register scratch);
+  void PopRegExpBasePointer(Register stack_pointer_out, Register scratch);
 
   Isolate* isolate() const { return masm_->isolate(); }
 

src/regexp/mips64/regexp-macro-assembler-mips64.h

@@ -153,13 +153,13 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerMIPS
 
   // Register holding the current input position as negative offset from
   // the end of the string.
-  static constexpr Register current_input_offset() { return a6; }
+  static constexpr Register current_input_offset() { return s2; }
 
   // The register containing the current character after LoadCurrentCharacter.
-  static constexpr Register current_character() { return a7; }
+  static constexpr Register current_character() { return s5; }
 
   // Register holding address of the end of the input string.
-  static constexpr Register end_of_input_address() { return t2; }
+  static constexpr Register end_of_input_address() { return s6; }
 
   // Register holding the frame address. Local variables, parameters and
   // regexp registers are addressed relative to this.
@@ -167,10 +167,10 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerMIPS
 
   // The register containing the backtrack stack top. Provides a meaningful
   // name to the register.
-  static constexpr Register backtrack_stackpointer() { return t0; }
+  static constexpr Register backtrack_stackpointer() { return s7; }
 
   // Register holding pointer to the current code object.
-  static constexpr Register code_pointer() { return a5; }
+  static constexpr Register code_pointer() { return s1; }
 
   // Byte size of chars in the string to match (decided by the Mode argument).
   inline int char_size() const { return static_cast<int>(mode_); }
@@ -201,8 +201,8 @@ class V8_EXPORT_PRIVATE RegExpMacroAssemblerMIPS
 
   void LoadRegExpStackPointerFromMemory(Register dst);
   void StoreRegExpStackPointerToMemory(Register src, Register scratch);
-  void PushRegExpBasePointer(Register scratch1, Register scratch2);
-  void PopRegExpBasePointer(Register scratch1, Register scratch2);
+  void PushRegExpBasePointer(Register stack_pointer, Register scratch);
+  void PopRegExpBasePointer(Register stack_pointer_out, Register scratch);
 
   Isolate* isolate() const { return masm_->isolate(); }