05fe8f918b
Until now, we've only checked whether merging stores would cause a cycle via the value argument, but the address and indexed offset arguments are also capable of creating cycles in some situations. The addresses are all base+offset with notionally the same base, but the base SDNode may still be different (e.g. via an indexed load in one case, and an ISD::ADD elsewhere). This allows cycles to creep in if one of these sources depends on another. The indexed offset is usually undef (representing a non-indexed store), but on some architectures (e.g. 32-bit ARM-mode ARM) it can be an arbitrary value, again allowing dependency cycles to creep in. llvm-svn: 345200
The LLVM Compiler Infrastructure
This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.