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Yonghong Song 25bf825961 bpf: add support for objdump -print-imm-hex 
Add support for 'objdump -print-imm-hex' for imm64, operand imm
and branch target. If user programs encode immediate values
as hex numbers, such an option will make it easy to correlate
asm insns with source code. This option also makes it easy
to correlate imm values with insn encoding.

There is one changed behavior in this patch. In old way, we
print the 64bit imm as u64:
  O << (uint64_t)Op.getImm();
and the new way is:
  O << formatImm(Op.getImm());

The formatImm is defined in llvm/MC/MCInstPrinter.h as
  format_object<int64_t> formatImm(int64_t Value)

So the new way to print 64bit imm is i64 type.
If a 64bit value has the highest bit set, the old way
will print the value as a positive value and the
new way will print as a negative value. The new way
is consistent with x86_64.
For the code (see the test program):
 ...
 if (a == 0xABCDABCDabcdabcdULL)
 ...
x86_64 objdump, with and without -print-imm-hex, looks like:
 48 b8 cd ab cd ab cd ab cd ab   movabsq $-6067004223159161907, %rax
 48 b8 cd ab cd ab cd ab cd ab   movabsq $-0x5432543254325433, %rax

Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 321215
 		2017-12-20 19:39:58 +00:00
clang [hwasan] Implement -fsanitize-recover=hwaddress. 2017-12-20 19:05:44 +00:00
clang-tools-extra [clangd] Pull CodeCompletionString handling logic into its own file and add unit test. 2017-12-20 17:24:31 +00:00
compiler-rt [libfuzzer] Fix UB when calculating Log(0) in StackDepthStepFunction(). 2017-12-20 19:31:51 +00:00
debuginfo-tests [debuginfo-tests] Support moving debuginfo-tests to llvm/projects 2017-12-12 16:54:20 +00:00
libclc configure.py: Add gfx900 (Vega, Raven) 2017-11-27 11:14:06 +00:00
libcxx Fix the definitions of 'reference' and 'pointer' in string_view that no one uses :-). Thanks to K-ballo for the catch. 2017-12-20 16:31:40 +00:00
libcxxabi [libcxxabi] Pass LIBCXXABI_SYSROOT and LIBCXXABI_GCC_TOOLCHAIN to lit 2017-12-12 01:20:37 +00:00
libunwind [libunwind][MIPS]: Add support for unwinding in O32 and N64 processes. 2017-12-12 21:43:36 +00:00
lld Pass a InputFile reference to the Lazy constructor. NFC. 2017-12-20 18:01:32 +00:00
lldb Replace an accidentally added "break" with an LLVM_FALLTHROUGH. 2017-12-19 23:16:38 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm bpf: add support for objdump -print-imm-hex 2017-12-20 19:39:58 +00:00
openmp Fix more inconsistent line endings. NFC. 2017-12-18 19:46:56 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [ScopBuilder] Split statements on encountering store instructions. 2017-12-11 12:51:24 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.