Changeset 172429 in webkit for trunk/Source/JavaScriptCore/offlineasm/ast.rb

Timestamp:

Aug 11, 2014, 8:20:04 PM (11 years ago)

Author:

[email protected]

Message:

Eliminate {push,pop}CalleeSaves in favor of individual pushes & pops
​https://bugs.webkit.org/show_bug.cgi?id=127155

Reviewed by Geoffrey Garen.

Eliminated the offline assembler instructions {push,pop}CalleeSaves as well as the
ARM64 specific {push,pop}LRAndFP and replaced them with individual push and pop
instructions. Where the registers referenced by the added push and pop instructions
are not part of the offline assembler register aliases, used a newly added "emit"
offline assembler instruction which takes a string literal and outputs that
string as a native instruction.

• llint/LowLevelInterpreter.asm:
• offlineasm/arm.rb:
• offlineasm/arm64.rb:
• offlineasm/ast.rb:
• offlineasm/cloop.rb:
• offlineasm/instructions.rb:
• offlineasm/mips.rb:
• offlineasm/parser.rb:
• offlineasm/sh4.rb:
• offlineasm/transform.rb:
• offlineasm/x86.rb:

File:

• trunk/Source/JavaScriptCore/offlineasm/ast.rb (modified) (2 diffs)

trunk/Source/JavaScriptCore/offlineasm/ast.rb

@@ -581 +581 @@
 end
 
+class StringLiteral < NoChildren
+    attr_reader :value
+    
+    def initialize(codeOrigin, value)
+        super(codeOrigin)
+        @value = value[1..-2]
+        raise "Bad string literal #{value.inspect} at #{codeOriginString}" unless value.is_a? String
+    end
+    
+    def dump
+        "#{value}"
+    end
+    
+    def ==(other)
+        other.is_a? StringLiteral and other.value == @value
+    end
+    
+    def address?
+        false
+    end
+    
+    def label?
+        false
+    end
+    
+    def immediate?
+        false
+    end
+    
+    def immediateOperand?
+        false
+    end
+        
+    def register?
+        false
+    end
+end
+
 class RegisterID < NoChildren
     attr_reader :name
@@ -890 +928 @@
         when "globalAnnotation"
             $asm.putGlobalAnnotation
+        when "emit"
+          $asm.puts "#{operands[0].dump}"
         else
             raise "Unhandled opcode #{opcode} at #{codeOriginString}"