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path: root/src/glsl/loop_unroll.cpp
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2010-12-09glsl: Unroll loops with conditional breaks anywhere (not just the end)Luca Barbieri
Currently we only unroll loops with conditional breaks at the end, which is the form that lower_jumps generates. However, if breaks are not lowered, they tend to appear at the beginning, so add support for a conditional break anywhere. Signed-off-by: Luca Barbieri <luca@luca-barbieri.com> Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
2010-12-09glsl: Consider the "else" branch when looking for loop breaks.Kenneth Graunke
Found this bug by code inspection. Based off the comments just before this code, the intent is to find whether the break exists in the "then" branch or the "else" branch. However, the code actually looked at the last instruction in the "then" branch twice.
2010-12-09glsl: Clean up code by adding a new is_break() function.Kenneth Graunke
2010-10-12glsl2: fix signed/unsigned comparison warningBrian Paul
2010-09-13loop_unroll: unroll loops with (lowered) breaksLuca Barbieri
If the loop ends with an if with one break or in a single break unroll it. Loops that end with a continue will have that continue removed by the redundant jump optimizer. Likewise loops that end with an if-statement with a break at the end of both branches will have the break pulled out after the if-statement. Loops of the form for (...) { do_something1(); if (cond) { do_something2(); break; } else { do_something3(); } } will be unrolled as do_something1(); if (cond) { do_something2(); } else { do_something3(); do_something1(); if (cond) { do_something2(); } else { do_something3(); /* Repeat inserting iterations here.*/ } } ir_lower_jumps can guarantee that all loops are put in this form and thus all loops are now potentially unrollable if an upper bound on the number of iterations can be found. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
2010-09-08glsl: add several EmitNo* options, and MaxUnrollIterationsLuca Barbieri
This increases the chance that GLSL programs will actually work. Note that continues and returns are not yet lowered, so linking will just fail if not supported. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
2010-09-03glsl2: Add module to perform simple loop unrollingIan Romanick