The AMD RadeonSI
Gallium3D driver for supporting the Radeon HD 7000/8000 series of graphics cards now has GL Shading Language 1.30 support exposed by default.
GLSL 1.30, the GL Shading Language version to match OpenGL 3.0, is now exposed by default in the year and a half old RadeonSI Gallium3D driver. After adding in a few other RadeonSI commits, including supporting new TGSI opcodes, Michel Dänzer enabled the RadeonSI GLSL 1.30 support unconditionally in the AMD open-source driver, per this commit
Now the driver only needs to catch up to GLSL 4.30, the version for OpenGL 4.3 that is supported by the Radeon "Southern Islands" graphics cards, in due time. For those needing support for beyond OpenGL 3.0+ with the latest AMD Radeon hardware, the Catalyst driver exposes full support for the hardware's capabilities.