Matt Pharr f06caabb07 Generate better code for break statements in varying loops (sometimes). ...

If we have a simple varying 'if' statement where the only code in the body is
a single 'break', then emit special case code that just updates the execution
mask directly.

Surprisingly, this leads to better generated code (e.g. Mandelbrot 7.1x on AVX
vs 5.8x before).  It's not clear why the general code generation path for
break doesn't generate the equivalent code; this topic should be investigated
further.  (Issue #277).

2012-06-06 11:08:42 -07:00

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