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Craig Topper addf5a7422 [X86] Teach the isel optimization for (x << C1) op C2 to (x op (C2>>C1)) << C1 to consider cases where C2>>C1 can fit an unsigned 32-bit immediate
For 64-bit operations we should consider if the immediate can be made to fit
in an unsigned 32-bits immedate. For OR/XOR this allows us to load the immediate
with MOV32ri instead of movabsq. For AND this allows us to fold the immediate.

Differential Revision: https://reviews.llvm.org/D59867

llvm-svn: 357196
2019-03-28 18:05:37 +00:00
2019-03-28 12:51:56 +00:00
2019-02-26 05:46:45 +00:00
2019-02-19 20:38:51 +00:00

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