v2 = bitcast v1
...
v3 = bitcast v2
...
= v3
=>
v2 = bitcast v1
...
= v1
if v1 and v3 are of in the same register class.
bitcast between i32 and fp (and others) are often not nops since they
are in different register classes. These bitcast instructions are often
left because they are in different basic blocks and cannot be
eliminated by dag combine.
rdar://9104514
llvm-svn: 127668
for templatized types that could cause parts of a std::vector (and I am sure
other STL types) to be incorrectly uniqued to each other wreaking havoc on
variable display for types within the same executable module.
llvm-svn: 127662
types that have different contents. Currently LLDB is incorrectly uniquing,
on MacOSX, the std::vector _VectorImpl class from the two different vector
templates. The DWARF looks like:
0x0000008e: DW_TAG_structure_type [7] *
DW_AT_name( "_Vector_base<int,std::allocator<int> >" )
DW_AT_declaration( 0x01 )
DW_AT_sibling( {0x00000103} )
0x00000098: DW_TAG_structure_type [8] *
DW_AT_name( "_Vector_impl" )
DW_AT_byte_size( 0x18 )
DW_AT_decl_file( "/usr/include/c++/4.2.1/bits/stl_vector.h" )
DW_AT_decl_line( 83 )
0x000000a0: DW_TAG_inheritance [9]
DW_AT_type( {0x000006fa} ( allocator<int> ) )
DW_AT_data_member_location( +0 )
DW_AT_accessibility( DW_ACCESS_public )
0x0000011b: DW_TAG_structure_type [7] *
DW_AT_name( "_Vector_base<short int,std::allocator<short int> >" )
DW_AT_declaration( 0x01 )
DW_AT_sibling( {0x00000190} )
0x00000125: DW_TAG_structure_type [8] *
DW_AT_name( "_Vector_impl" )
DW_AT_byte_size( 0x18 )
DW_AT_decl_file( "/usr/include/c++/4.2.1/bits/stl_vector.h" )
DW_AT_decl_line( 83 )
0x0000012d: DW_TAG_inheritance [9]
DW_AT_type( {0x00000f75} ( allocator<short int> ) )
DW_AT_data_member_location( +0 )
DW_AT_accessibility( DW_ACCESS_public )
In this case it using DIE 0x00000098 for both 0x00000098 and 0x00000125.
This test will help detect this issue once I have a fix for it. I have a fix
that I am testing.
llvm-svn: 127660
instruction set. This code adds support for the VEX prefix
and for the YMM registers accessible on AVX-enabled
architectures. Instruction table support that enables AVX
instructions for the disassembler is in an upcoming patch.
llvm-svn: 127644
replace some uses of FieldOffsetInBytes. The remaining uses of
FieldOffsetInBytes will be replaced once NextFieldOffsetInBytes is converted
to CharUnits. No change in functionality intended.
llvm-svn: 127641
and then go kablooie. The problem was that it was tracking the PHI nodes anew
each time into this function. But it didn't need to. And because the recursion
didn't know that a PHINode was visited before, it would go ahead and call
itself.
There is a testcase, but unfortunately it's too big to add. This problem will go
away with the EH rewrite.
<rdar://problem/8856298>
llvm-svn: 127640
After the open+fstat optimization, files were already opened for FileManager::getBufferForFile() and we closed them after reading them.
The problem was that when -working-directory was passed, the code path that actually reuses & closes the already opened file descriptor
was not followed.
llvm-svn: 127639
Also more cleanly separate the ARM vs. Thumb functionality. Previously, the
encoding would be incorrect for some Thumb instructions (the indirect calls).
llvm-svn: 127637
doesn't return, so just go back to using the old runtime function instead
of trying to use abort() when __builtin_unreachable (or an equivalent) isn't
supported.
llvm-svn: 127629
cannot yet be resolved, be sure to push the new label declaration into
the right place within the identifier chain. Otherwise, name lookup in
C++ gets confused when searching for names that are lexically closer
than the label. Fixes PR9463.
llvm-svn: 127623
Ted Kremenek