Reland the original patch with additional commit containing fix for two
issues:
1. Attempting to bitcast using MVTs with no corresponding LLVM type.
getDWordFromOffset now works directly with the original vector to get
the corresponding elements given the DWordOffset.
2. Improper bit tracking in CalculateByteProvider for vector types using
certain ops. Previously, bit tracking for certain ops (e.g.
ISD::TRUNCATE) assumed operands were scalar types, which is not correct
since these ops have different semantics depending on vector / scalar.
CalculateByteProvider / CalculateSrcByte now exit on vector types,
handling which is a TODO.
Similar to 806761a7629df268c8aed49657aeccffa6bca449.
For IR files without a target triple, -mtriple= specifies the full
target triple while -march= merely sets the architecture part of the
default target triple, leaving a target triple which may not make sense,
e.g. amdgpu-apple-darwin.
Therefore, -march= is error-prone and not recommended for tests without
a target triple. The issue has been benign as we recognize
$unknown-apple-darwin as ELF instead of rejecting it outrightly.
This patch changes AMDGPU tests to not rely on the default
OS/environment components. Tests that need fixes are not changed:
```
LLVM :: CodeGen/AMDGPU/fabs.f64.ll
LLVM :: CodeGen/AMDGPU/fabs.ll
LLVM :: CodeGen/AMDGPU/floor.ll
LLVM :: CodeGen/AMDGPU/fneg-fabs.f64.ll
LLVM :: CodeGen/AMDGPU/fneg-fabs.ll
LLVM :: CodeGen/AMDGPU/r600-infinite-loop-bug-while-reorganizing-vector.ll
LLVM :: CodeGen/AMDGPU/schedule-if-2.ll
```
This allows working with e.g. v8i8 / v16i8 sources.
It is generally useful, but is primarily beneficial when allowing e.g. v8i8s to be passed to branches directly through registers. As such, this is the first in a series of patches to enable that work. However, it effects https://reviews.llvm.org/D155995, so it has been implemented on top of that.
Differential Revision: https://reviews.llvm.org/D159036
Change-Id: Idfcb57dacd0c32cab040fe4dd4ac2ec762750664
Currently not (xor_one_use) pattern is always selected to S_XNOR irrelative od the node divergence.
This relies on further custom selection pass which converts to VALU if necessary and replaces with V_NOT_B32 ( V_XOR_B32)
on those targets which have no V_XNOR.
Current change enables the patterns which explicitly select the not (xor_one_use) to appropriate form.
We assume that xor (not) is already turned into the not (xor) by the combiner.
Reviewed By: rampitec
Differential Revision: https://reviews.llvm.org/D116270
This patch allows ISD::FSHR(i32) patterns to lower to ALIGNBIT instructions.
This improves test coverage of ISD::FSHR matching - x86 has both FSHL/FSHR instructions and we prefer FSHL by default.
Differential Revision: https://reviews.llvm.org/D76070
