[llvm] r337794 - AMDGPU/GlobalISel: Remove unnecessary legality constraint for G_EXTRACT

[Tom Stellard via llvm-commits]

Author: tstellar
Date: Mon Jul 23 18:43:49 2018
New Revision: 337794

URL: http://llvm.org/viewvc/llvm-project?rev=337794&view=rev
Log:
AMDGPU/GlobalISel: Remove unnecessary legality constraint for G_EXTRACT

Summary:
We were marking G_EXTRACT operations unsupported if the output type
was larger than the input type.  I don't see how this could ever actually
happen, so I dropped the constraint.  Doing this makes it possible to
reuse the same legality code for G_INSERT.

Reviewers: arsenm

Reviewed By: arsenm

Subscribers: kzhuravl, wdng, nhaehnle, yaxunl, rovka, kristof.beyls, dstuttard, tpr, t-tye, llvm-commits

Differential Revision: https://reviews.llvm.org/D49600

Modified:
    llvm/trunk/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp

Modified: llvm/trunk/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp?rev=337794&r1=337793&r2=337794&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp Mon Jul 23 18:43:49 2018
@@ -173,9 +173,6 @@ AMDGPULegalizerInfo::AMDGPULegalizerInfo
 
   // FIXME: Doesn't handle extract of illegal sizes.
   getActionDefinitionsBuilder(G_EXTRACT)
-    .unsupportedIf([=](const LegalityQuery &Query) {
-        return Query.Types[0].getSizeInBits() >= Query.Types[1].getSizeInBits();
-      })
     .legalIf([=](const LegalityQuery &Query) {
         const LLT &Ty0 = Query.Types[0];
         const LLT &Ty1 = Query.Types[1];