[Mesa-dev] i965 FS back-end IR builder migration.

[Francisco Jerez]

This series migrates the FS compiler back-end to the i965 IR builder I
proposed a while ago as part of my ARB_shader_image_load_store series,
and fixes a couple of bugs I found during the process.  It doesn't yet
attempt to convert the VEC4 back-end, but the VEC4 version of the
builder is also included for completeness.

For a branch in testable form see:
http://cgit.freedesktop.org/~currojerez/mesa/log/?h=i965-ir-builder

[PATCH 01/38] i965/fs: Introduce FS IR builder.
[PATCH 02/38] i965/vec4: Introduce VEC4 IR builder.
[PATCH 03/38] i965/fs: Allocate a common IR builder object in fs_visitor.
[PATCH 04/38] i965/fs: Migrate opt_combine_constants to the IR builder.
[PATCH 05/38] i965/fs: Migrate opt_peephole_predicated_break to the IR builder.
[PATCH 06/38] i965/fs: Take into account all instruction fields in CSE instructions_match().
[PATCH 07/38] i965/vec4: Take into account all instruction fields in CSE instructions_match().
[PATCH 08/38] i965/fs: Don't drop force_writemask_all and _sechalf when copying a CSE temporary.
[PATCH 09/38] i965/fs: Migrate opt_cse to the IR builder.
[PATCH 10/38] i965/fs: Create and emit instructions in one step in opt_peephole_sel.
[PATCH 11/38] i965/fs: Migrate opt_peephole_sel to the IR builder.
[PATCH 12/38] i965/fs: Migrate opt_sampler_eot to the IR builder.
[PATCH 13/38] i965/fs: Migrate try_replace_with_sel to the IR builder.
[PATCH 14/38] i965/fs: Migrate register spills and fills to the IR builder.
[PATCH 15/38] i965/fs: Migrate lower_load_payload to the IR builder.
[PATCH 16/38] i965/fs: Migrate lower_integer_multiplication to the IR builder.
[PATCH 17/38] i965/fs: Migrate Gen4 send dependency workarounds to the IR builder.
[PATCH 18/38] i965/fs: Migrate pull constant loads to the IR builder.
[PATCH 19/38] i965/fs: Migrate texturing implementation to the IR builder.
[PATCH 20/38] i965/fs: Migrate untyped surface read and atomic to the IR builder.
[PATCH 21/38] i965/fs: Migrate shader time to the IR builder.
[PATCH 22/38] i965/fs: Migrate FS interpolation code to the IR builder.
[PATCH 23/38] i965/fs: Migrate FS gl_SamplePosition/ID computation code to the IR builder.
[PATCH 24/38] i965/fs: Migrate FS discard handling to the IR builder.
[PATCH 25/38] i965/fs: Migrate FS alpha test to the IR builder.
[PATCH 26/38] i965/fs: Migrate FS framebuffer writes to the IR builder.
[PATCH 27/38] i965/fs: Migrate VS output writes to the IR builder.
[PATCH 28/38] i965/fs: Migrate CS terminate message to the IR builder.
[PATCH 29/38] i965/fs: Migrate NIR emit_percomp() to the IR builder.
[PATCH 30/38] i965/fs: Migrate NIR variable handling to the IR builder.
[PATCH 31/38] i965/fs: Migrate translation of NIR control flow to the IR builder.
[PATCH 32/38] i965/fs: Migrate translation of NIR ALU instructions to the IR builder.
[PATCH 33/38] i965/fs: Migrate translation of NIR intrinsics to the IR builder.
[PATCH 34/38] i965/fs: Migrate translation of NIR texturing instructions to the IR builder.
[PATCH 35/38] i965/fs: Migrate test_fs_saturate_propagation to the IR builder.
[PATCH 36/38] i965/fs: Migrate test_fs_cmod_propagation to the IR builder.
[PATCH 37/38] i965/fs: Remove dead IR construction code from the visitor.
[PATCH 38/38] i965/fs: Drop fs_inst::force_uncompressed.