[llvm-bugs] [Bug 26697] [x86, AVX] simplify masked memop's mask operand

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=26697

Simon Pilgrim <llvm-dev at redking.me.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED
 Fixed By Commit(s)|                            |r358887,r358651,r359082

--- Comment #4 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
Resolving

rL358887
[TargetLowering][AMDGPU][X86] Improve SimplifyDemandedBits bitcast handling

rL358651
[X86][SSE] Lower ICMP EQ(AND(X,C),C) -> SRA(SHL(X,LOG2(C)),BW-1) iff C is
power-of-2.

rL359082
Test cases



one_mask_bit_set1: # @one_mask_bit_set1
  vmaskmovps %xmm0, %xmm1, (%rdi)
  retq

one_mask_bit: # @one_mask_bit
  vpsrad $31, %xmm0, %xmm0
  retq

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