Mistake: glslc should not do if-optimize for some subgroup op.

Hi, i found glslc may add some if-optimize for && statement.

but somtimes it make error case( Some subgroup-op require all lane in active state), eg code like this:


compiling code is below:


now subgroup-op was placed in if-statement, and may no active in all quad lane, then will case some compute error.

if change the code like this:


now all quad lane can active to compute, and the result is right: