[PATCH] D69367: [GlobalISel][AArch64][AMDGPU][X86] Teach LegalizationArtifactCombiner to combine trunc(g_constant).

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: arsenm, aemerson, paquette, dsanders.
Herald added subscribers: Petar.Avramovic, kristof.beyls, t-tye, tpr, dstuttard, rovka, yaxunl, nhaehnle, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

This allows X86 to properly form shift by immediate instructions
since we require an 8-bit constant to match the imported
SelectionDAG patterns.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D69367

Files:
  llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-merge-values.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-ext-legalizer.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-extract.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-fcopysign.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-icmp.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-merge-values.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-select.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-sext.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-sitofp.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-uitofp.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-unmerge-values.mir
  llvm/test/CodeGen/X86/GlobalISel/add-ext.ll
  llvm/test/CodeGen/X86/GlobalISel/ashr-scalar.ll
  llvm/test/CodeGen/X86/GlobalISel/ext-x86-64.ll
  llvm/test/CodeGen/X86/GlobalISel/ext.ll
  llvm/test/CodeGen/X86/GlobalISel/gep.ll
  llvm/test/CodeGen/X86/GlobalISel/legalize-ext-x86-64.mir
  llvm/test/CodeGen/X86/GlobalISel/lshr-scalar.ll
  llvm/test/CodeGen/X86/GlobalISel/shl-scalar.ll
  llvm/test/CodeGen/X86/GlobalISel/x86_64-legalize-sitofp.mir

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D69367.226204.patch
Type: text/x-patch
Size: 77027 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20191024/91fedc3c/attachment-0001.bin>