This commit fixes `Trunc(Float)` and `Trunc(Float4)` generic LLVM code generation. If `Trunc(x)` is implemented with `Float(Int(x))`, it will result in quality warning in dEQP. Bug: b/115344057 Test: dEQP-GLES3.functional.shaders.builtin_functions.precision.trunc Test: dEQP-GLES3.functional.shaders.builtin_functions.precision.modf Change-Id: I62d2dd1907e345fb00307b6c0d4d74613237f94b Reviewed-on: https://swiftshader-review.googlesource.com/21029Tested-by: Chris Forbes <chrisforbes@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Reviewed-by: Chris Forbes <chrisforbes@google.com>
