glsl: Fix continue statements in do-while loops.
From the GLSL 4.40 spec, section 6.4 (Jumps):
The continue jump is used only in loops. It skips the remainder of
the body of the inner most loop of which it is inside. For while
and do-while loops, this jump is to the next evaluation of the
loop condition-expression from which the loop continues as
previously defined.
Previously, we incorrectly treated a "continue" statement as jumping
to the top of a do-while loop.
This patch fixes the problem by replicating the loop condition when
converting the "continue" statement to IR. (We already do a similar
thing in "for" loops, to ensure that "continue" causes the loop
expression to be executed).
Fixes piglit tests:
- glsl-fs-continue-inside-do-while.shader_test
- glsl-vs-continue-inside-do-while.shader_test
- glsl-fs-continue-in-switch-in-do-while.shader_test
- glsl-vs-continue-in-switch-in-do-while.shader_test
Cc: mesa-stable@lists.freedesktop.org
Acked-by: Carl Worth <cworth@cworth.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
1 file changed