[lldb] Use ReadCStringsFromMemory to speed-up AppleObjCClassDescriptorV2::method_t lookup (#172031)
With this improvement, compiling a simple Objective-C program like:
```
int main() {
@autoreleasepool {
NSDictionary *mapping = @{ @"one": @1, @"two": @2, @"three": @3 };
return 0; //breakhere
}
}
```
And running `expr -O -- mapping[@"one"]`, we can observe the following
packet count for the expression evaluation:
```
Before:
multi mem read ($MultiMemRead) : 94
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[AArch64][llvm] Add codegen for simd fpcvt intrinsics
Add tablegen patterns to provide codegen for SCVTF and UCVTF
operating purely on SIMD & FP registers, using explicit bitcasts.
[lldb][windows] skip TestPlatformProcessLaunchGDBServer.test_launch_with_unusual_process_name (#173250)
This patch skips
TestPlatformProcessLaunchGDBServer.test_launch_with_unusual_process_name
on Windows which is flaky.
The test will be reenabled once it has been fixed.
Revert "[SLP]Enable float point math ops as copyables elements."
This reverts commit e644f06c2ffc23b3415f3478b05c627303aef614 to fix
crashes found during internal testing
[Flang][Docs] Formatting change (#173257)
The flang.llvm.org page listed two entries (Testing, Resources) from the
Debug generation document in the table of contents. Change the
formatting to only include the top-level title.
[AArch64][GlobalISel] Added test coverage for sri intrinsic
Previously, generation of sri intrinsics was tested during the ACLE -> IR stage, but not in the IR -> MIR stage. Now, correct generation of sri intrinsics is tested in both stages.
[lldb] Add ReadCStrings API to Process (#172026)
This commit uses Process::ReadMemoryRanges to create an efficient method
for reading multiple strings at once. This method works like the
single-string version, reading 256 bytes at a time, but instead doing it
for _every_ string requested at the same time.
ValueTracking: Avoid calling computeKnownFPClass on matched constant
The fmul case already tries to match a literal value, we don't
need to match it twice.
ValueTracking: Improve computeKnownFPClass fmul handling
Improve known non-nan sign bit tracking. Handle cases with
a known 0 or inf input of indeterminate sign.
The tails of some library functions have sign management
for special cases.
AMDGPU: Stop requiring afn for f32 rsq formation
We were checking for afn or !fpmath attached to the sqrt. We
are not trying to replace a correctly rounded rsqrt; we're replacing
the two correctly rounded operations with the contracted operation.
It's net a better precision, so contract on both instructions should
be sufficient. Both the contracted and uncontracted sequences pass
the OpenCL conformance test, with a lower maximum error contracted.
