search for: isintimmleg

The thing I wanted for mips 16 for large literals does not seem to exist right now. They have MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) but not the same thing for integer literals. For Mips16, to materialize a 32 bit literal using instructions is expensive, both in terms of the number of registers and the number of instructions. You always want to just do a load of

As reported in an earlier thread (http://clang-developers.42468.n3.nabble.com/Disable-memset-synthesis-tp4057810.html), we noticed in some cases that the llvm.memset intrinsic, if lowered to stores, could help with performance. Here's a test case: If LIMIT is > 8, I see that a call to memset is emitted for arm & aarch64, but not for x86 target. typedef struct { int v0[100]; }