[PATCH] D74315: AMDGPU/GlobalISel: Start handling _L to _LZ optimization

[Matt Arsenault via Phabricator via llvm-commits]

arsenm marked an inline comment as done.
arsenm added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp:3560-3564
+    // FIXME: This isn't the cleanest way to handle this, but it's the easiest
+    // option the current infrastructure gives. We really should be changing the
+    // base intrinsic opcode, but the current searchable tables only gives us
+    // the final MI opcode. Eliminate the register here, and track with an
+    // immediate 0 so the final selection will know to do the opcode change.
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nhaehnle wrote:
> This no longer applies, does it? MIMGLZMappingTable contains L and LZ fields of type MIMGBaseOpcode now.
This is still in terms of the machine opcode, not the intrinsic ID


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https://reviews.llvm.org/D74315