[Bug 28624] [r300g] too many texture indirections (was: fails to compile some fragment programs of Enemy Territory: Quake Wars)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28624

--- Comment #2 from Marek Olšák <maraeo at gmail.com> 2010-07-05 09:26:36 PDT ---
The failing shader:

FRAG
DCL IN[0], GENERIC[0], PERSPECTIVE
DCL IN[1], GENERIC[1], PERSPECTIVE
DCL IN[2], GENERIC[2], PERSPECTIVE
DCL IN[3], GENERIC[3], PERSPECTIVE
DCL IN[4], GENERIC[4], PERSPECTIVE
DCL IN[5], GENERIC[5], PERSPECTIVE
DCL IN[6], GENERIC[6], PERSPECTIVE
DCL IN[7], GENERIC[7], PERSPECTIVE
DCL OUT[0], COLOR
DCL SAMP[0]
DCL TEMP[0..1]
IMM FLT32 {    0.0714,     0.1071,     0.1429,     0.1786}
  0: TEX TEMP[0], IN[1], SAMP[0], RECT
  1: MUL TEMP[1], TEMP[0], IMM[0].yyyy
  2: TEX TEMP[0], IN[0], SAMP[0], RECT
  3: MAD TEMP[1], TEMP[0], IMM[0].xxxx, TEMP[1]
  4: TEX TEMP[0], IN[2], SAMP[0], RECT
  5: MAD TEMP[1], TEMP[0], IMM[0].zzzz, TEMP[1]
  6: TEX TEMP[0], IN[3], SAMP[0], RECT
  7: MAD TEMP[1], TEMP[0], IMM[0].wwww, TEMP[1]
  8: TEX TEMP[0], IN[4], SAMP[0], RECT
  9: MAD TEMP[1], TEMP[0], IMM[0].wwww, TEMP[1]
 10: TEX TEMP[0], IN[5], SAMP[0], RECT
 11: MAD TEMP[1], TEMP[0], IMM[0].zzzz, TEMP[1]
 12: TEX TEMP[0], IN[6], SAMP[0], RECT
 13: MAD TEMP[1], TEMP[0], IMM[0].yyyy, TEMP[1]
 14: TEX TEMP[0], IN[7], SAMP[0], RECT
 15: MAD OUT[0], TEMP[0], IMM[0].xxxx, TEMP[1]
 16: END

If we reorder all the instructions, rename a few registers etc. we will end up
with 1 TEX block. This seems to be the third TEX scheduling bug in the compiler
we know about.

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