Summary:
When ARMFrameLowering::emitPopInst generates a "pop" instruction to restore the callee saved registers, it checks if the LR register is among them. If so, the function may decide to remove the basic block's terminator and replace it with a "pop" to the PC register instead of LR.
This leads to a problem when the block's terminator is preceded by a "llvm.debugtrap" call. The MI iterator points to the trap in such a case, which is also a terminator. If the function decides to restore LR to PC, it erroneously removes the trap.
Reviewers: asl, rengolin
Subscribers: aemerson, jfb, rengolin, dschuff, llvm-commits
Differential Revision: http://reviews.llvm.org/D13672
llvm-svn: 251123
Apparently there were tons of instances I missed last time, I
guess I accidentally ran 2to3 non-recursively. This should be
every occurrence of a print statement fixed to use a print function
as well as from __future__ import print_function being added to
every file.
After this patch print statements will stop working everywhere in
the test suite, and the print function should be used instead.
llvm-svn: 251121
Summary:
This ensures that BranchFolding (and similar) won't remove these blocks.
Also allow AsmPrinter::EmitBasicBlockStart to process MBBs which are
address-taken but do not have BBs that are address-taken, since otherwise
its call to getAddrLabelSymbolTableToEmit would fail an assertion on such
blocks. I audited the other callers of getAddrLabelSymbolTableToEmit
(and getAddrLabelSymbol); they all have BBs known to be address-taken
except for the call through getAddrLabelSymbol from
WinException::create32bitRef; that call is actually now unreachable, so
I've removed it and updated the signature of create32bitRef.
This fixes PR25168.
Reviewers: majnemer, andrew.w.kaylor, rnk
Subscribers: pgavlin, llvm-commits
Differential Revision: http://reviews.llvm.org/D13774
llvm-svn: 251113
If the loaded type sizes don't match the element type of the sequential type, all bets are off and the addresses may, indeed, overlap.
Surprisingly, this just got caught in one test, on one builder, out of the 30+ builders testing this change. Congratulations go to http://lab.llvm.org:8011/builders/clang-aarch64-lnt/builds/5205.
llvm-svn: 251112
* Use PTRACE_GETVFPREGS/PTRACE_SETVFPREGS to access the floating point
registers instead of the old PTRACE_GETFPREGS/PTRACE_SETFPREGS. The
new call is available since armv5.
* Work around a kernel issue in PTRACE_POKEUSER with reading out the full
register set, modifying the neccessary value and then writing it back.
llvm-svn: 251111
GCC produce a lot of strict-aliasing warning for the LLDB codebase
what makes reading the compile output very difficult. This change
disable these warnings to reduce the noise as we already ignore them.
We should consider re-enabling the warning if we fix all (or most)
strict-aliasing violation first.
Differential revision: http://reviews.llvm.org/D13981
llvm-svn: 251107
Re-commit the change after fixing a lot of race condition in LLDB
exposed by this change
Loading the debug info from a large application is the slowest task
LLDB do. This CL makes most of the dwarf parsing code multi-threaded.
As a result the speed of "attach; backtrace; exit;" when the inferior
is an LLDB with full debug info increased by a factor of 2.
Differential revision: http://reviews.llvm.org/D13662
llvm-svn: 251106
The Timer class already had some support for multi-threaded access
but it still contained several race conditions. This CL fixes them
in preparation of adding multi-threaded dwarf parsing (and other
multi-threaded parts later).
Differential revision: http://reviews.llvm.org/D13940
llvm-svn: 251105
Summary:
The list of loaded modules which skip_if_library_missing is depending on is not available on
linux until after we run the target. This causes the tests to be wrongfully skipped. This commit
moves the skip call after the run command.
Reviewers: granata.enrico, tfiala
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D13985
llvm-svn: 251102
This relands r250831 after some fixes to shrink the ParentMap overall
with one addtional tweak: nodes with pointer identity (e.g. Decl* and
friends) can be store more efficiently so I put them in a separate map.
All other nodes (so far only TypeLoc and NNSLoc) go in a different map
keyed on DynTypedNode. This further uglifies the code but significantly
reduces memory overhead.
Overall this change still make ParentMap significantly larger but it's
nowhere as bad as before. I see about 25 MB over baseline (pre-r251008)
on X86ISelLowering.cpp. If this becomes an issue we could consider
splitting the maps further as DynTypedNode is still larger (32 bytes)
than a single TypeLoc (16 bytes) but I didn't want to introduce even
more complexity now.
Differential Revision: http://reviews.llvm.org/D14011
llvm-svn: 251101
I could not come up a way to test this -- I think this bug is latent
today, and will not actually result in a miscompile.
In `getPreStartForExtend`, SCEV constructs `PreStart` as a sum of all of
`SA`'s operands except `Op`. It also uses `SA`'s no-wrap flags, and
this is problematic because removing an element from an add expression
can make it signed-wrap. E.g. if `SA` was `(127 + 1 + -1)`, then it
could safely be `<nsw>` (since `sext(127) + sext(1) + sext(-1)` ==
`sext(127 + 1 + -1)`), but `(127 + 1)` (== `PreStart` if `Op` is `-1`)
is not `<nsw>`.
Transferring `<nuw>` from `SA` to `PreStart` is safe, as far as I can
tell.
llvm-svn: 251097
Also adds a 'trivial' ELF file. This was generated by assembling
and linking a file with the symbol main which contains a single
return instruction.
llvm-svn: 251096
This patch converts the remaining references to literal
strings for names of profile runtime entites (such as
profile runtime hook, runtime hook use function, profile
init method, register function etc).
Also added documentation for all the new interfaces.
llvm-svn: 251093
previous release. Most of the diffs are duplication in the xcode
project file caused by adding a "debugserver-mini" target. Jim
Ingham added support for a new SPI needed to request app launches
on iOS. Greg Clayton added code to indicate the platform of the
binary (macosx, ios, watchos, tvos) based on Mach-O load commands.
Jason Molenda added code so debugserver will identify when it is
running on a tvos/watchos device to lldb.
llvm-svn: 251091
relocateOne is a function to apply a relocation. Previously, that
function took a pointer to Elf_Rel or Elf_Rela in addition to other
information that can be derived from the relocation entry. This patch
simplifies the parameter list. The new parameters, P or SA, are used
in the ELF spec to describe each relocation. These names make
relocateOne look like a mechanical, direct translation of the ELF spec.
llvm-svn: 251090
Previously, lldb did not use type summaries for simple types with no children
(like function pointers). This patch enables MI to use lldb type summaries for
evaluation of all types of objects, so MI own formatters are no longer needed.
Patch from evgeny.leviant@gmail.com
Reviewed by: abidh
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D13799
llvm-svn: 251082
This patch enables type summary for 'char' type. Given:
char c = 'h';
Before this patch, c evaluates as:
(char) $0 = 'h'
After this patch, we get:
(char) $0 = 104 'h'
This change allows the formatting of character types in MI to be removed
and replaced with that in lldb, and can be useful when evaluating
non-printable characters.
Patch from evgeny.leviant@gmail.com
Reviewed by: granata.enrico
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D13657
llvm-svn: 251080
Artyom Skrobov