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mesa: fix prog_optimize.c assertions triggered by SWZ opcode

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The SWZ instruction can have swizzle terms >4 (SWIZZLE_ZERO, SWIZZLE_ONE).
These swizzle terms caused a few assertions to fail.
This started happening after the commit "mesa: Actually use the Mesa IR
optimizer for ARB programs." when replaying some apitrace files.

A new piglit test (tests/asmparsertest/shaders/ARBfp1.0/swz-08.txt)
exercises this.

Cc: "10.3" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
(cherry picked from commit 7b2c703244)
This commit is contained in:
Brian Paul 2014-09-16 15:14:19 -06:00 • committed by Emil Velikov
parent 27f70a9273
commit 9599cd6a2f
1 changed files with 4 additions and 5 deletions
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9
src/mesa/program/prog_optimize.c
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@ -114,7 +114,6 @@ get_src_arg_mask(const struct prog_instruction *inst,
read_mask = 0x0;
for (comp = 0; comp < 4; ++comp) {
const GLuint coord = GET_SWZ(inst->SrcReg[arg].Swizzle, comp);
ASSERT(coord < 4);
if (channel_mask & (1 << comp) && coord <= SWIZZLE_W)
read_mask |= 1 << coord;
}
@ -284,11 +283,11 @@ _mesa_remove_dead_code_global(struct gl_program *prog)
for (comp = 0; comp < 4; comp++) {
const GLuint swz = GET_SWZ(inst->SrcReg[j].Swizzle, comp);
ASSERT(swz < 4);
if ((read_mask & (1 << swz)) == 0)
continue;
if (swz <= SWIZZLE_W)
if (swz <= SWIZZLE_W) {
if ((read_mask & (1 << swz)) == 0)
continue;
tempRead[index][swz] = GL_TRUE;
}
}
}
}