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Author SHA1 Message Date
Roman Lebedev 925553ec91 [NFC][Codegen][PowerPC] Autogenerate shift-cmp.ll test 
Being affected by upcoming patch

llvm-svn: 362529
 2019-06-04 17:05:34 +00:00
Hal Finkel a39fd4bc53 [PowerPC] Add a pattern for a runtime bit check 
Following a suggestion by Sanjay, we should lower:

  %shl = shl i32 1, %y
  %and = and i32 %x, %shl
  %cmp = icmp eq i32 %and, %shl
  ret i1 %cmp

into:

  subfic r4, r4, 32
  rlwnm r3, r3, r4, 31, 31

Add this pattern and some associated patterns for the 64-bit case and the
not-equal case. Fixes PR27356.

llvm-svn: 280454
 2016-09-02 02:34:44 +00:00