llvm/lib/CodeGen/GlobalISel at e28eceb434ca0d3d032bb6de141f3173a514b427 - llvm

RPCS3/llvm

mirror of https://github.com/RPCS3/llvm.git synced 2026-07-24 20:25:32 -04:00

Files

T

Diana Picus 2de9fad1ee [ARM GlobalISel] Support G_CTLZ and G_CTLZ_ZERO_UNDEF

We can now select CLZ via the TableGen'erated code, so support G_CTLZ
and G_CTLZ_ZERO_UNDEF throughout the pipeline for types <= s32.

Legalizer:
If the CLZ instruction is available, use it for both G_CTLZ and
G_CTLZ_ZERO_UNDEF. Otherwise, use a libcall for G_CTLZ_ZERO_UNDEF and
lower G_CTLZ in terms of it.

In order to achieve this we need to add support to the LegalizerHelper
for the legalization of G_CTLZ_ZERO_UNDEF for s32 as a libcall (__clzsi2).

We also need to allow lowering of G_CTLZ in terms of G_CTLZ_ZERO_UNDEF
if that is supported as a libcall, as opposed to just if it is Legal or
Custom. Due to a minor refactoring of the helper function in charge of
this, we will also allow the same behaviour for G_CTTZ and G_CTPOP.
This is not going to be a problem in practice since we don't yet have
support for treating G_CTTZ and G_CTPOP as libcalls (not even in
DAGISel).

Reg bank select:
Map G_CTLZ to GPR. G_CTLZ_ZERO_UNDEF should not make it to this point.

Instruction select:
Nothing to do.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@347545 91177308-0d34-0410-b5e6-96231b3b80d8

2018-11-26 11:07:02 +00:00

CallLowering.cpp

[GISel]: Remove an incorrect assert in CallLowering

2018-09-28 15:08:49 +00:00

CMakeLists.txt

[globalisel][legalizer] Adapt LegalizerInfo to support inter-type dependencies and other things.

2018-01-29 19:54:49 +00:00

Combiner.cpp

Re-commit: [globalisel] Add a combiner helpers for extending loads and use them in a pre-legalize combiner for AArch64

2018-10-03 02:12:17 +00:00

CombinerHelper.cpp

[globalisel][combine] When placing truncates, handle the case when the BB is empty