mesa: glsl: grab latest fixes from gallium-0.1 branch

Includes:
1. Fixes failed asserting about bad swizzles in src reg emit.
2. Tracks uniform var usage.
3. Emit exp() in terms of EXP2 instruction.

1 files changed, 36 insertions, 7 deletions

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index f96c6557596..7006e86958d 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -1481,7 +1481,7 @@ _slang_simple_writemask(GLuint writemask, GLuint swizzle)
  * \return GL_FALSE for simple writemasks, GL_TRUE for non-simple
  */
 static GLboolean
-swizzle_to_writemask(GLuint swizzle,
+swizzle_to_writemask(slang_assemble_ctx *A, GLuint swizzle,
                      GLuint *writemaskOut, GLuint *swizzleOut)
 {
    GLuint mask = 0x0, newSwizzle[4];
@@ -1495,6 +1495,18 @@ swizzle_to_writemask(GLuint swizzle,
          break;
       }
       assert(swz >= 0 && swz <= 3);
+
+      if (swizzle != SWIZZLE_XXXX &&
+          swizzle != SWIZZLE_YYYY &&
+          swizzle != SWIZZLE_ZZZZ &&
+          swizzle != SWIZZLE_WWWW &&
+          (mask & (1 << swz))) {
+         /* a channel can't be specified twice (ex: ".xyyz") */
+         slang_info_log_error(A->log, "Invalid writemask '%s'",
+                              _mesa_swizzle_string(swizzle, 0, 0));
+         return GL_FALSE;
+      }
+
       mask |= (1 << swz);
    }
    assert(mask <= 0xf);
@@ -1590,11 +1602,11 @@ resolve_swizzle(const slang_operation *oper)
  * As above, but produce a writemask.
  */
 static GLuint
-resolve_writemask(const slang_operation *oper)
+resolve_writemask(slang_assemble_ctx *A, const slang_operation *oper)
 {
    GLuint swizzle = resolve_swizzle(oper);
    GLuint writemask, swizzleOut;
-   swizzle_to_writemask(swizzle, &writemask, &swizzleOut);
+   swizzle_to_writemask(A, swizzle, &writemask, &swizzleOut);
    return writemask;
 }
 
@@ -1668,7 +1680,7 @@ _slang_gen_asm(slang_assemble_ctx *A, slang_operation *oper,
 
       dest_oper = &oper->children[0];
 
-      writemask = resolve_writemask(dest_oper);
+      writemask = resolve_writemask(A, dest_oper);
 
       n0 = _slang_gen_operation(A, dest_oper);
       if (!n0)
@@ -1980,6 +1992,12 @@ _slang_gen_function_call_name(slang_assemble_ctx *A, const char *name,
       fun = _slang_locate_struct_constructor(A, name);
    }
 
+   /*
+    * At this point, some heuristics are used to try to find a function
+    * that matches the calling signature by means of casting or "unrolling"
+    * of constructors.
+    */
+
    if (!fun && _slang_is_vec_mat_type(name)) {
       /* Next, if this call looks like a vec() or mat() constructor call,
        * try "unwinding" the args to satisfy a constructor.
@@ -1995,7 +2013,7 @@ _slang_gen_function_call_name(slang_assemble_ctx *A, const char *name,
       }
    }
 
-   if (!fun) {
+   if (!fun && _slang_is_vec_mat_type(name)) {
       /* Next, try casting args to the types of the formal parameters */
       int numArgs = oper->num_children;
       fun = _slang_find_function_by_argc(A->space.funcs, name, numArgs);
@@ -2008,6 +2026,13 @@ _slang_gen_function_call_name(slang_assemble_ctx *A, const char *name,
       assert(fun);
    }
 
+   if (!fun) {
+      slang_info_log_error(A->log,
+                           "Function '%s' not found (check argument types)",
+                           name);
+      return NULL;
+   }
+
    n = _slang_gen_function_call(A, fun, oper, dest);
 
    if (n && !n->Store && !dest
@@ -2716,7 +2741,11 @@ _slang_assignment_compatible(slang_assemble_ctx *A,
    slang_typeinfo t0, t1;
    GLuint sz0, sz1;
 
-   
+   if (op0->type == SLANG_OPER_POSTINCREMENT ||
+       op0->type == SLANG_OPER_POSTDECREMENT) {
+      return GL_FALSE;
+   }
+
    slang_typeinfo_construct(&t0);
    _slang_typeof_operation(A, op0, &t0);
 
@@ -3020,7 +3049,7 @@ _slang_gen_assignment(slang_assemble_ctx * A, slang_operation *oper)
       if (lhs && rhs) {
          /* convert lhs swizzle into writemask */
          GLuint writemask, newSwizzle;
-         if (!swizzle_to_writemask(lhs->Store->Swizzle,
+         if (!swizzle_to_writemask(A, lhs->Store->Swizzle,
                                    &writemask, &newSwizzle)) {
             /* Non-simple writemask, need to swizzle right hand side in
              * order to put components into the right place.