I don't know when this started happening (I'll try bisecting tomorrow)
but we're seeing a crash in ast_type_qualifier::validate_in_qualifier()
in -O3 builds with gcc 5.4.0 on Ubuntu 16.04.
Specifically, at ast_type.cpp:654:
if ((this->flags.i & ~valid_in_mask.flags.i) != 0) {
It seems to be the ~ operator/function which is implemented with an SSE
pxor instruction.
I found that this patch avoids the issue:
diff --git a/src/compiler/glsl/ast.h b/src/compiler/glsl/ast.h
index a1ec0d5..2e518ce 100644
--- a/src/compiler/glsl/ast.h
+++ b/src/compiler/glsl/ast.h
@@ -474,7 +474,7 @@ enum {
struct ast_type_qualifier {
DECLARE_RALLOC_CXX_OPERATORS(ast_type_qualifier);
- DECLARE_BITSET_T(bitset_t, 128);
+ DECLARE_BITSET_T(bitset_t, 96);
union flags {
struct {
This probably prevents use of xmm instructions, but I haven't inspected
the code.
Is anyone else seeing this?
-Brian
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