New optimization: DimShuffle(Alloc(...)) -> Alloc(..., use dims of 1 for new dimensions) #5024

Log sum exp optimization for numerical stability

Manual revert of 29e67107

Somewhat smaller/faster 3d convolution tests

A few small update.

Scan with Checkpoints (part 2)

Fix a change to gpuarray conv from gh-5069. dnn conv wasn't working a…

32bit

Cudnn RNN bindings.

Make device=gpu with floatX=float16 raise an error (cause many user q…

Make device=gpu with floatX=float16 raise an error (cause many user questions and this should never be used). if floatX=float64, raise an error.

fix tests in mode=FAST_COMPILE

GpuCorrMM and GpuCorr3dMM in new backend