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# 1416744f 11-Apr-2022 Matt Arsenault <[email protected]>

GlobalISel: Implement computeKnownBits for overflow bool results


Revision tags: llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3, llvmorg-14.0.0-rc2, llvmorg-14.0.0-rc1, llvmorg-15-init, llvmorg-13.0.1, llvmorg-13.0.1-rc3, llvmorg-13.0.1-rc2, llvmorg-13.0.1-rc1
# 078da26b 08-Nov-2021 Abinav Puthan Purayil <[email protected]>

[AMDGPU] Check for unneeded shift mask in shift PatFrags.

The existing constrained shift PatFrags only dealt with masked shift
from OpenCL front-ends. This change copies the
X86DAGToDAGISel::isUnnee

[AMDGPU] Check for unneeded shift mask in shift PatFrags.

The existing constrained shift PatFrags only dealt with masked shift
from OpenCL front-ends. This change copies the
X86DAGToDAGISel::isUnneededShiftMask() function to AMDGPU and uses it in
the shift PatFrag predicates.

Differential Revision: https://reviews.llvm.org/D113448

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Revision tags: llvmorg-13.0.0, llvmorg-13.0.0-rc4
# 61e3b9fe 22-Sep-2021 Abinav Puthan Purayil <[email protected]>

[AMDGPU] Add constrained shift pattern matches.

The motivation for this is due to clang's conformance to
https://www.khronos.org/registry/OpenCL/specs/3.0-unified/html/OpenCL_C.html#operators-shift

[AMDGPU] Add constrained shift pattern matches.

The motivation for this is due to clang's conformance to
https://www.khronos.org/registry/OpenCL/specs/3.0-unified/html/OpenCL_C.html#operators-shift
which makes clang emit (<shift> a, (and b, <width> - 1)) for `a <shift> b`
in OpenCL where a is an int of bit width <width>.

Differential revision: https://reviews.llvm.org/D110231

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