forked from OSchip/llvm-project
c1e0184317
We want to use the sum in the icmp to allow matching with m_UAddWithOverflow and eliminate the 'not'. This is discussed in D51929 and is another step towards solving PR14613: https://bugs.llvm.org/show_bug.cgi?id=14613 Name: uaddsat, -1 fval %notx = xor i32 %x, -1 %a = add i32 %x, %y %c = icmp ugt i32 %notx, %y %r = select i1 %c, i32 %a, i32 -1 => %a = add i32 %x, %y %c2 = icmp ugt i32 %y, %a %r = select i1 %c2, i32 -1, i32 %a Name: uaddsat, -1 fval + ult %notx = xor i32 %x, -1 %a = add i32 %x, %y %c = icmp ult i32 %y, %notx %r = select i1 %c, i32 %a, i32 -1 => %a = add i32 %x, %y %c2 = icmp ugt i32 %y, %a %r = select i1 %c2, i32 -1, i32 %a https://rise4fun.com/Alive/nTp llvm-svn: 354393 |
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| .. | ||
| AggressiveInstCombine | ||
| Coroutines | ||
| Hello | ||
| IPO | ||
| InstCombine | ||
| Instrumentation | ||
| ObjCARC | ||
| Scalar | ||
| Utils | ||
| Vectorize | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||