We've found compiler errors frequently. An absolute hot-spot for compiler errors for us was (relatively) obscure platforms, so we found SDKs for embedded MIPS p

We've found compiler errors frequently. An absolute hot-spot for compiler errors for us was (relatively) obscure platforms, so we found SDKs for embedded MIPS processors that broke basic gcc intrinsics. No-one had ever noticed that really basic intrinsics (at the level of popcount/count leading zeros) were wrong. C++ was another hotspot of brokenness for early gcc 4.x.