diff --git a/3rdparty/glsl-optimizer/src/glsl/glsl_optimizer.cpp b/3rdparty/glsl-optimizer/src/glsl/glsl_optimizer.cpp
index 69318ee0..f5ceda82 100644
--- a/3rdparty/glsl-optimizer/src/glsl/glsl_optimizer.cpp
+++ b/3rdparty/glsl-optimizer/src/glsl/glsl_optimizer.cpp
@@ -171,7 +171,7 @@ static void propagate_precision_expr(ir_instruction *ir, void *data)
 		return;
 	
 	glsl_precision prec_params_max = glsl_precision_undefined;
-	for (int i = 0; i < expr->get_num_operands(); ++i)
+	for (int i = 0; i < (int)expr->get_num_operands(); ++i)
 	{
 		ir_rvalue* op = expr->operands[i];
 		if (op && op->get_precision() != glsl_precision_undefined)
@@ -317,7 +317,7 @@ glslopt_shader* glslopt_optimize (glslopt_ctx* ctx, glslopt_shader_type type, co
 {
 	glslopt_shader* shader = new (ctx->mem_ctx) glslopt_shader ();
 
-	PrintGlslMode printMode;
+	PrintGlslMode printMode = kPrintGlslVertex;
 	switch (type) {
 	case kGlslOptShaderVertex: shader->shader->Type = GL_VERTEX_SHADER; printMode = kPrintGlslVertex; break;
 	case kGlslOptShaderFragment: shader->shader->Type = GL_FRAGMENT_SHADER; printMode = kPrintGlslFragment; break;
diff --git a/3rdparty/glsl-optimizer/src/glsl/ir.cpp b/3rdparty/glsl-optimizer/src/glsl/ir.cpp
index fc00be00..d19de803 100644
--- a/3rdparty/glsl-optimizer/src/glsl/ir.cpp
+++ b/3rdparty/glsl-optimizer/src/glsl/ir.cpp
@@ -1544,7 +1544,7 @@ ir_swizzle::variable_referenced() const
 ir_variable::ir_variable(const struct glsl_type *type, const char *name,
 			 ir_variable_mode mode, glsl_precision precision)
    : max_array_access(0), read_only(false), centroid(false), invariant(false),
-     mode(mode), precision(precision), interpolation(INTERP_QUALIFIER_NONE)
+     mode(mode), interpolation(INTERP_QUALIFIER_NONE), precision(precision)
 {
    this->ir_type = ir_type_variable;
    this->type = type;
diff --git a/3rdparty/glsl-optimizer/src/glsl/ir_validate.cpp b/3rdparty/glsl-optimizer/src/glsl/ir_validate.cpp
index f75d05e9..dd9ccdea 100644
--- a/3rdparty/glsl-optimizer/src/glsl/ir_validate.cpp
+++ b/3rdparty/glsl-optimizer/src/glsl/ir_validate.cpp
@@ -227,6 +227,9 @@ ir_visitor_status
 ir_validate::visit_leave(ir_expression *ir)
 {
    switch (ir->operation) {
+   case ir_ternop_clamp:
+   case ir_ternop_mix:
+       break;
    case ir_unop_bit_not:
       assert(ir->operands[0]->type == ir->type);
       break;