glsl: In lower_jumps.cpp, lower both branches of a conditional.
Previously, lower_jumps.cpp would break out of its loop after lowering a jump instruction in just the then- or else-branch of a conditional, and it would fail to lower a jump instruction occurring in the other branch. Without this patch, lower_jumps.cpp may require multiple passes in order to lower all jumps. This results in sub-optimal output because lower_jumps.cpp produces a brand new set of temporary variables each time it is run, and the redundant temporary variables are not guaranteed to be eliminated by later optimization passes. Fixes unit test test_lower_returns_4.
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@ -638,7 +638,10 @@ lower_continue:
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block_records[lower].min_strength = strength_always_clears_execute_flag;
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block_records[lower].may_clear_execute_flag = true;
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this->progress = true;
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break;
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/* Let the loop run again, in case the other branch of the
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* if needs to be lowered too.
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*/
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}
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}
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