forked from OSchip/llvm-project
35b1c2d19d
This is a longer variant for the pattern handled in rL346713 This one includes zexts. Eventually, we should canonicalize all rotate patterns to the funnel shift intrinsics, but we need a bit more infrastructure to make sure the vectorizers handle those intrinsics as well as the shift+logic ops. https://rise4fun.com/Alive/FMn Name: narrow rotateright %neg = sub i8 0, %shamt %rshamt = and i8 %shamt, 7 %rshamtconv = zext i8 %rshamt to i32 %lshamt = and i8 %neg, 7 %lshamtconv = zext i8 %lshamt to i32 %conv = zext i8 %x to i32 %shr = lshr i32 %conv, %rshamtconv %shl = shl i32 %conv, %lshamtconv %or = or i32 %shl, %shr %r = trunc i32 %or to i8 => %maskedShAmt2 = and i8 %shamt, 7 %negShAmt2 = sub i8 0, %shamt %maskedNegShAmt2 = and i8 %negShAmt2, 7 %shl2 = lshr i8 %x, %maskedShAmt2 %shr2 = shl i8 %x, %maskedNegShAmt2 %r = or i8 %shl2, %shr2 llvm-svn: 346716 |
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| .. | ||
| AggressiveInstCombine | ||
| Coroutines | ||
| Hello | ||
| IPO | ||
| InstCombine | ||
| Instrumentation | ||
| ObjCARC | ||
| Scalar | ||
| Utils | ||
| Vectorize | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||