diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/shader/slang/slang_vartable.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/src/mesa/shader/slang/slang_vartable.c b/src/mesa/shader/slang/slang_vartable.c index de0c93957b4..3649bdf9e71 100644 --- a/src/mesa/shader/slang/slang_vartable.c +++ b/src/mesa/shader/slang/slang_vartable.c @@ -72,9 +72,8 @@ _slang_delete_var_table(slang_var_table *vt) /** - * Create new table, put at head, return ptr to it. - * XXX we should take a maxTemps parameter to indicate how many temporaries - * are available for the current shader/program target. + * Create new table on top of vartable stack. + * Used when we enter a {} block. */ void _slang_push_var_table(slang_var_table *vt) @@ -95,7 +94,8 @@ _slang_push_var_table(slang_var_table *vt) /** - * Destroy given table, return ptr to Parent + * Pop top entry from variable table. + * Used when we leave a {} block. */ void _slang_pop_var_table(slang_var_table *vt) @@ -125,10 +125,12 @@ _slang_pop_var_table(slang_var_table *vt) else comp = 0; - assert(store->Index >= 0); - for (j = 0; j < store->Size; j++) { - assert(t->Temps[store->Index * 4 + j + comp] == VAR); - t->Temps[store->Index * 4 + j + comp] = FREE; + /* store->Index may be -1 if we run out of registers */ + if (store->Index >= 0) { + for (j = 0; j < store->Size; j++) { + assert(t->Temps[store->Index * 4 + j + comp] == VAR); + t->Temps[store->Index * 4 + j + comp] = FREE; + } } store->Index = -1; } @@ -156,7 +158,7 @@ _slang_pop_var_table(slang_var_table *vt) /** - * Add a new variable to the given symbol table. + * Add a new variable to the given var/symbol table. */ void _slang_add_variable(slang_var_table *vt, slang_variable *v) @@ -214,6 +216,7 @@ alloc_reg(slang_var_table *vt, GLint size, GLboolean isTemp) for (i = 0; i <= vt->MaxRegisters * 4 - size; i += step) { GLuint found = 0; for (j = 0; j < (GLuint) size; j++) { + assert(i + j < 4 * MAX_PROGRAM_TEMPS); if (i + j < vt->MaxRegisters * 4 && t->Temps[i + j] == FREE) { found++; } @@ -225,13 +228,17 @@ alloc_reg(slang_var_table *vt, GLint size, GLboolean isTemp) /* found block of size free regs */ if (size > 1) assert(i % 4 == 0); - for (j = 0; j < (GLuint) size; j++) + for (j = 0; j < (GLuint) size; j++) { + assert(i + j < 4 * MAX_PROGRAM_TEMPS); t->Temps[i + j] = isTemp ? TEMP : VAR; + } assert(i < MAX_PROGRAM_TEMPS * 4); t->ValSize[i] = size; return i; } } + + /* if we get here, we ran out of registers */ return -1; } |