Yonghong Song 86f1ba02a9 bpf: fix a strict-aliasing issue ...

Davide Italiano reported the following issue if llvm
is compiled with gcc -Wstrict-aliasing -Werror:
.....
lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFISelDAGToDAG.cpp.o
../lib/Target/BPF/BPFISelDAGToDAG.cpp: In member function ‘virtual
void {anonymous}::BPFDAGToDAGISel::PreprocessISelDAG()’:
../lib/Target/BPF/BPFISelDAGToDAG.cpp:264:26: warning: dereferencing
type-punned pointer will break strict-aliasing rules
[-Wstrict-aliasing]
       val = *(uint16_t *)new_val;
.....

The error is caused by my previous commit (revision 305560).

This patch fixed the issue by introducing an union to avoid
type casting.

Signed-off-by: Yonghong Song <yhs@fb.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305608 91177308-0d34-0410-b5e6-96231b3b80d8

2017-06-16 23:28:04 +00:00

..

Disassembler

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

InstPrinter

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

MCTargetDesc

Move Object format code to lib/BinaryFormat.

2017-06-07 03:48:56 +00:00

TargetInfo

Move the global variables representing each Target behind accessor function

2016-10-09 23:00:34 +00:00

BPF.h

…

BPF.td

convert bpf assembler to look like kernel verifier output

2016-11-18 02:32:35 +00:00

BPFAsmPrinter.cpp

bpf: clang-format on BPFAsmPrinter.cpp

2017-06-13 16:17:20 +00:00

BPFCallingConv.td

…

BPFFrameLowering.cpp

PrologEpilogInserter: Rewrite API to determine callee save regsiters.

2015-07-14 17:17:13 +00:00

BPFFrameLowering.h

Change eliminateCallFramePseudoInstr() to return an iterator

2016-03-31 18:33:38 +00:00

BPFInstrFormats.td

…

BPFInstrInfo.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

BPFInstrInfo.h

Finish renaming remaining analyzeBranch functions

2016-09-14 20:43:16 +00:00

BPFInstrInfo.td

bpf: set missing types in insn tablegen file

2017-06-16 15:30:55 +00:00

BPFISelDAGToDAG.cpp

bpf: fix a strict-aliasing issue

2017-06-16 23:28:04 +00:00

BPFISelLowering.cpp

[bpf] disallow global_addr+off folding

2017-05-26 22:32:41 +00:00

BPFISelLowering.h

[bpf] disallow global_addr+off folding

2017-05-26 22:32:41 +00:00

BPFMCInstLower.cpp

Cleanup dump() functions.

2017-01-28 02:02:38 +00:00

BPFMCInstLower.h

[bpf] error when unknown bpf helper is called

2017-01-17 07:26:17 +00:00

BPFRegisterInfo.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

BPFRegisterInfo.h

Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)

2015-06-23 09:49:53 +00:00

BPFRegisterInfo.td

…

BPFSubtarget.cpp

Revert r247692: Replace Triple with a new TargetTuple in MCTargetDesc/* and related. NFC.

2015-09-15 16:17:27 +00:00

BPFSubtarget.h

Rename TargetSelectionDAGInfo into SelectionDAGTargetInfo and move it to CodeGen/

2016-01-27 16:32:26 +00:00

BPFTargetMachine.cpp

Sort the remaining #include lines in include/... and lib/....

2017-06-06 11:49:48 +00:00

BPFTargetMachine.h

Delete Reloc::Default.

2016-05-18 22:04:49 +00:00

CMakeLists.txt

[BPF] Correct the file name of the -gen-asm-matcher output file to not start with X86.

2017-05-31 19:01:05 +00:00

LLVMBuild.txt

[bpf] add BPF disassembler

2016-11-20 02:25:00 +00:00