[llvm][OpenMP] Allow Chunk Size on SIMD Guided (#178853)
As per the OpenMP Spec, Chunk Size is allowed when using the guided
kind-type with the schedule clause. However, when being used in cases
such as `!$omp do simd schedule (simd:guided,4)`, this was not allowed
as the base type, BaseGuidedSimd, would hit an assert not allowing
ChunkSizes.
By making this change, we can allow the use of the Guided type, with a
ChunkSize and the schedule clause when using OMPIRBuidler.
Fixes #82106
[MC] Try to fix ubsan bot
Check that the size is non-zero to make sure we don't call
memcpy with null pointers. This is well-defined now, but ubsan
may still warn about it.
(cherry picked from commit d064f395af7ac226dec3f8e90516a26e96e2acf1)
[X86][APX] Disable PP2/PPX generation on Windows (#178122)
The PUSH2/POP2/PPX instructions for APX require updates to the Microsoft
Windows OS x64 calling convention documented at
https://learn.microsoft.com/en-us/cpp/build/exception-handling-x64?view=msvc-170
due to lack of suitable unwinder opcodes that can support APX
PUSH2/POP2/PPX.
The PR request disables this support by default for code robustness;
workloads that choose to explicitly enable this support can change the
default behavior by explicitly specifying the flag options that enable
this support e.g. for experimentation or code paths that do not need
unwinder support.
(cherry picked from commit 2f3935bcee6eaf7df8c85a21b7c0fbef967316b5)
[lldb] Fix SBBreakpointName::SetEnabled to propagate changes to breakpoints (#178734)
When setting the enabled state of a breakpoint name via the API, the
change was not being propagated to breakpoints using that name.
This was inconsistent with the CLI behaviour where `breakpoint name
configure --enable/--disable` correctly updates all associated
breakpoints.
(cherry picked from commit 8370304f1e5878c1860223239932ddd05d9ba4c8)
[AArch64][GlobalISel] Do no skip zext in getTestBitReg. (#177991)
We can, when attempting to lower to tbz, skip a zext that is then not
accounted for elsewhere. The attached test ends up with a tbz from an
extract that then does not properly zext the value extracted from the
vector. This patch fixes that by only looking through a G_ZEXT if the
bit checked is in the low part of the value, lining up the code with the
comment.
Fixes #173895
(cherry picked from commit 0321f3eeee5cceddc2541046ee155863f5f59585)
[X86] getScalarMaskingNode - FIXUPIMM scalar ops take upper elements from second operand (#179101)
FIXUPIMMSS/SD instructions passthrough the SECOND operand upper elements, and not the first like most (2-op) instructions
Fixes #179057
(cherry picked from commit 49d2323447aec77c3d1ae8c941f3f8a126ff1480)
[X86] Add test coverage for #179057 (#179092)
Incorrect folding of fixupimm scalar intrinsics passthrough when the
mask is known zero
(cherry picked from commit 618d71dc98df760d0c724cff6fa69b780e8c0372)
ValueTracking: Revert noundef checks in computeKnownFPClass for fmul/fma (#178850)
This functionally reverts fd5cfcc41311c6287e9dc408b8aae499501660e1 and
35ce17b6f6ca5dd321af8e6763554b10824e4ac4.
This was correct and necessary, but is causing performance regressions
since isGuaranteedNotToBeUndef is apparently not smart enough to detect
through recurrences. Revert this for the release branch.
Also the test coverage was inadequate for the fma case, so add a new
case which changes with and without the check.
(cherry picked from commit 07ec2fa1443ccd3cbb55612937f1dddebfe51c15)
