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Author	SHA1	Message	Date
Matt Arsenault	1416744f84	GlobalISel: Implement computeKnownBits for overflow bool results	2022-04-11 19:43:37 -04:00
Abinav Puthan Purayil	078da26b1c	[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	2021-11-24 10:53:12 +05:30
Abinav Puthan Purayil	61e3b9fefe	[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	2021-10-26 19:07:19 +05:30

Author

SHA1

Message

Date

Matt Arsenault

1416744f84

GlobalISel: Implement computeKnownBits for overflow bool results

2022-04-11 19:43:37 -04:00

Abinav Puthan Purayil

078da26b1c

[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

2021-11-24 10:53:12 +05:30

Abinav Puthan Purayil

61e3b9fefe

[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

2021-10-26 19:07:19 +05:30

3 Commits