forked from OSchip/llvm-project
14aa2ad1f4
Canonicalize (srl (bswap i32 x), 16) to (rotr (bswap i32 x), 16), if the high 16-bits of x are zero. Similarly, canonicalize (srl (bswap i64 x), 32) to (rotr (bswap i64 x), 32), if the high 32-bits of x are zero. test_rev_w_srl16: test_rev_w_srl16: and w8, w0, #0xffff and w8, w0, #0xffff rev w8, w8 ---> rev16 w0, w8 lsr w0, w8, #16 test_rev_x_srl32: test_rev_x_srl32: rev x8, x8 ---> rev32 x0, x8 lsr x0, x8, #32 llvm-svn: 270896 |
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