因为MC 层工作在目标文件一级的抽象级别,所以它不再包括如函数、全局变量这一类描述。它会考虑如标号(label)、伪指令(directives)和指令。一个很关键的类是MCStreamer类,它是一个高效的 Assembler 的抽象实现 (可以继承它来实现输出汇编 .s 文件或 ELF .o 文件等)。MCStreamer为每一种元素提供一个方法,比如Emit...
官方文档是这么介绍的:The IAR Assembler for Arm is a powerful relocating macro assembler with a versatile set of directives and expression operators. The assembler features a built-in C language preprocessor and supports conditional assembly. 大意就是: IAR Assembler for Arm 是一个功能强大的重定位宏...
最重要的部分是 LLVM IR,编译器用它来作代码表示。 LLVM IR is a low-level RISC-like virtual instruction set. Like a real RISC instruction set, it supports linear sequences of simple instructions like add, subtract, compare, and branch. These instructions are in three address form, which means...
2: compiler, {1}, ir //编译器编译,生成中间代码 3: backend, {2}, assembler //后端生成目标代码 4: assembler, {3}, object //汇编 5: linker, {4}, image //链接镜像文件(动态库) 6: bind-arch, "x86_64", {5}, image //编译成指定架构,这里采用的是模拟器测试 词法分析测试: 代码会被...
The documentation mentions that these directives should work (exactly like they do for powerpc): .machine STRING[+EXTENSION]… This directive allows changing the machine for which code is generated. string may be any of the -march= selection options, or push, or pop. .machine push saves the...
EmitValue -> .byte), but MCObjectStreamer implements a full assembler.For target specific directives, the MCStreamer has a MCTargetStreamer instance. Each target that needs it defines a class that inherits from it and is a lot like MCStreamer itself: It has one method per directive and two...
+# RUN: | FileCheck --check-prefix=CHECK-ASM %s +# RUN: llvm-mc --triple loongarch64 --filetype=obj < %s \ +# RUN: | llvm-readobj -r - | FileCheck --check-prefix=CHECK-RELOC %s + +# Test the operation of the push and pop assembler directives when +# using .option relax. ...
This model applies equally well to interpreters and JIT compilers. The Java Virtual Machine (JVM) is also an implementation of this model, which uses Java bytecode as the interface between the front end and optimizer. 11.1.1. Implications of this Design ...
3: backend, {2}, assembler //后端生成目标代码 4: assembler, {3}, object //汇编 5: linker, {4}, image //链接镜像文件(动态库) 6: bind-arch, "x86_64", {5}, image //编译成指定架构,这里采用的是模拟器测试 词法分析测试: 代码会被分割为一个个很小的单元,检测语法格式,如匹配大括号是...
在讲解各编译器之前,必须先了解一下以下这些文件。这些文件在编译器目录下或者编译生成目标平台的可执行程序时经常见到。此外,还需要注意区分 Windows 平台 和 Linux 平台的文件。 .o 文件:指的是 object 文件,俗称目标文件。在 Linux 下扩展名缩写为.o,在 windows 下通常为.obj文件。