Bug 31101

Summary: [glsl2] abort() in ir_validate::visit_enter(ir_assignment *ir)
Product: Mesa Reporter: Fredrik Höglund <fredrik>
Component: Mesa coreAssignee: Kenneth Graunke <kenneth>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: git   
Hardware: x86 (IA32)   
OS: All   
i915 platform: i915 features:

Description Fredrik Höglund 2010-10-25 12:01:05 UTC
The GLSL compiler aborts when validating the IR for this shader:

void main()
    vec2 var;
    gl_FragColor = vec4(var, vec2(1.0));

Debug output:

Assignment count of LHS write mask channels enabled not
matching RHS vector size (2 LHS, 1 RHS).
(assign (constant bool (1)) (zw) (var_ref vec_ctor@0x9ed8ad0)  (constant float (1.000000)) )
Comment 1 Kenneth Graunke 2010-10-25 12:58:02 UTC
Thanks for the report!  This should be fixed in master by the following commit:

commit ba2382f50d7815947e17fe993b39feb573638d12
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Mon Oct 25 12:44:55 2010 -0700

    glsl: Fix constant component count in vector constructor emitting.
    Fixes freedesktop.org bug #31101 as well as piglit test cases
    assignment-type-mismatch.vert and constructor-28.vert.

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