The W bit distinquishes which operand is the memory operand. But if the mod bits are 3 then the memory operand is a register and there are two possible encodings. We already did this correctly for several other XOP instructions.
llvm-svn: 287961
Not sure this is truly needed but we had the floating point equivalents, the aligned equivalents, and the EVEX equivalents. So this just makes it complete.
llvm-svn: 287960
Handling SIGILL on Darwin works fine, so let's just make this feature work and re-enable the ill.cc testcase.
Differential Revision: https://reviews.llvm.org/D27141
llvm-svn: 287959
This patch prints out all CPU registers after a SIGSEGV. These are available in the signal handler context. Only implemented for Darwin. Can be turned off with the dump_registers flag.
Differential Revision: https://reviews.llvm.org/D11365
llvm-svn: 287957
-color-diagnostics=auto is default because that's the same as
Clang's default. When color is enabled, error or warning messages
are colored like this.
error:
<bold>ld.lld</bold> <red>error:</red> foo.o: no such file
warning:
<bold>ld.lld</bold> <magenta>warning:</magenta> foo.o: no such file
Differential Revision: https://reviews.llvm.org/D27117
llvm-svn: 287949
Uncompressing section contents and spliting mergeable section contents
into smaller chunks are heavy tasks. They scan entire section contents
and do CPU-intensive tasks such as uncompressing zlib-compressed data
or computing a hash value for each section piece.
Luckily, these tasks are independent to each other, so we can do that
in parallel_for_each. The number of input sections is large (as opposed
to the number of output sections), so there's a large parallelism here.
Actually the current design to call uncompress() and splitIntoPieces()
in batch was chosen with doing this in mind. Basically what we need to
do here is to replace `for` with `parallel_for_each`.
It seems this patch improves latency significantly if linked programs
contain debug info (which in turn contain lots of mergeable strings.)
For example, the latency to link Clang (debug build) improved by 20% on
my machine as shown below. Note that ld.gold took 19.2 seconds to do
the same thing.
Before:
30801.782712 task-clock (msec) # 3.652 CPUs utilized ( +- 2.59% )
104,084 context-switches # 0.003 M/sec ( +- 1.02% )
5,063 cpu-migrations # 0.164 K/sec ( +- 13.66% )
2,528,130 page-faults # 0.082 M/sec ( +- 0.47% )
85,317,809,130 cycles # 2.770 GHz ( +- 2.62% )
67,352,463,373 stalled-cycles-frontend # 78.94% frontend cycles idle ( +- 3.06% )
<not supported> stalled-cycles-backend
44,295,945,493 instructions # 0.52 insns per cycle
# 1.52 stalled cycles per insn ( +- 0.44% )
8,572,384,877 branches # 278.308 M/sec ( +- 0.66% )
141,806,726 branch-misses # 1.65% of all branches ( +- 0.13% )
8.433424003 seconds time elapsed ( +- 1.20% )
After:
35523.764575 task-clock (msec) # 5.265 CPUs utilized ( +- 2.67% )
159,107 context-switches # 0.004 M/sec ( +- 0.48% )
8,123 cpu-migrations # 0.229 K/sec ( +- 23.34% )
2,372,483 page-faults # 0.067 M/sec ( +- 0.36% )
98,395,342,152 cycles # 2.770 GHz ( +- 2.62% )
79,294,670,125 stalled-cycles-frontend # 80.59% frontend cycles idle ( +- 3.03% )
<not supported> stalled-cycles-backend
46,274,151,813 instructions # 0.47 insns per cycle
# 1.71 stalled cycles per insn ( +- 0.47% )
8,987,621,670 branches # 253.003 M/sec ( +- 0.60% )
148,900,624 branch-misses # 1.66% of all branches ( +- 0.27% )
6.747548004 seconds time elapsed ( +- 0.40% )
llvm-svn: 287946
The function was used only within Relocations.cpp, but now we are
using it in many places, so this patch moves it to a file that fits
to the functionality.
llvm-svn: 287943
Summary:
Shuffle lowering may have widened the element size of a i32 shuffle to i64 before selecting X86ISD::SHUF128. If this shuffle was used by a vselect this can prevent us from selecting masked operations.
This patch detects this and changes the element size to match the vselect.
I don't handle changing integer to floating point or vice versa as its not clear if its better to push such a bitcast to the inputs of the shuffle or to the user of the vselect. So I'm ignoring that case for now.
Reviewers: delena, zvi, RKSimon
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D27087
llvm-svn: 287939
Summary:
If the `FromDecl` is a class forward declaration, the reference is
still considered as referring to the original definition given the nature
of forward-declarations, so we can't do a raw name replacement in this case.
Reviewers: bkramer
Subscribers: cfe-commits, klimek
Differential Revision: https://reviews.llvm.org/D27132
llvm-svn: 287929
Switch various bits of platform-specific code to chrono that I did not notice
when doing a linux build. This exposed a bug that ConnectionGenericFileWindows
did not handle the magic UINT32_MAX timeout value (instead it waited for about an
hour, which is close enough I guess). Fix that as well.
llvm-svn: 287927
Summary:
The iterative algorithm for Loop Unswitching may render some of the branches unreachable in the unswitched loops.
Given the exponential nature of the algorithm, this is quite an overhead.
This patch fixes this problem by selectively unswitching only those branches within a loop that are reachable from the loop header.
Reviewers: Michael Zolothukin, Anna Thomas, Weiming Zhao.
Subscribers: llvm-commits.
Differential Revision: http://reviews.llvm.org/D26299
llvm-svn: 287925
Summary:
For example, this case was missed when looking for different but canonical
namespaces. UseContext in this case should be considered as in the canonical
namespace.
```
namespace a { namespace b { <FromContext> } }
namespace a { namespace b { namespace c { <UseContext> } } }
```
Added some commenting.
Reviewers: bkramer
Subscribers: klimek, cfe-commits
Differential Revision: https://reviews.llvm.org/D27125
llvm-svn: 287924
The conditional expression is ambiguous there, so help it by explicitly casting.
This will go away once we use chrono all the way down.
llvm-svn: 287921
This replaces the raw integer timeout parameters in the class with their
chrono-based equivalents. To achieve this, I have moved the Timeout class to a
more generic place and added a quick unit test for it.
llvm-svn: 287920
This patch corrects the behaviour of code such as:
.local foo
jal foo
foo:
to use the correct jal expansion when writing ELF files.
Patch by: Daniel Sanders
Reviewers: zoran.jovanovic, seanbruno, vkalintiris
Differential Revision: https://reviews.llvm.org/D24722
llvm-svn: 287918
Summary:
This is a test-the-water change about possibilities of reducing duplication in
the register context definitions.
I've named the new class RegisterInfoPOSIX, as RegisterContextPOSIX was already
taken :(. The two files were identical except for a fix by Tamas in D12636,
which was applied to the Linux version only, which fixed a discrepancy between
the definitions of fpsr and fpcr on one hand, and all other floating point
register definitions on the other.
Linux test suite still passes after this change. For freebsd, make the floating
point register behavior consistent, but I don't know whether it will be
consistently fixed, or consistently broken. By eyeballing the code, I have a
feeling that a similar fix to D12636 will be required in
RegisterContextPOSIXProcessMonitor_arm64::ReadRegister, but I can't be sure as I
have no way to test it (the assert in that function should fire upon accessing
the registers if it is wrong though).
Reviewers: emaste, clayborg
Subscribers: aemerson, rengolin, beanz, mgorny, modocache, dmikulin, lldb-commits
Differential Revision: https://reviews.llvm.org/D25947
llvm-svn: 287916
Tobias Grosser