3 files changed, 14 insertions, 6 deletions
diff --git a/src/mesa/shader/prog_execute.c b/src/mesa/shader/prog_execute.c
index a1c20a325e..37750cc330 100644
--- a/src/mesa/shader/prog_execute.c
+++ b/src/mesa/shader/prog_execute.c
@@ -1767,10 +1767,15 @@ _mesa_execute_program(GLcontext * ctx,
          break;
       case OPCODE_PRINT:
          {
-            GLfloat a[4];
-            fetch_vector4(&inst->SrcReg[0], machine, a);
-            printf("%s%g, %g, %g, %g\n", (const char *) inst->Data,
-		   a[0], a[1], a[2], a[3]);
+            if (inst->SrcReg[0].File != -1) {
+               GLfloat a[4];
+               fetch_vector4(&inst->SrcReg[0], machine, a);
+               printf("%s%g, %g, %g, %g\n", (const char *) inst->Data,
+                            a[0], a[1], a[2], a[3]);
+            }
+            else {
+               printf("%s\n", (const char *) inst->Data);
+            }
          }
          break;
       case OPCODE_END:
diff --git a/src/mesa/shader/slang/slang_builtin.c b/src/mesa/shader/slang/slang_builtin.c
index 5533cc5b65..791e751526 100644
--- a/src/mesa/shader/slang/slang_builtin.c
+++ b/src/mesa/shader/slang/slang_builtin.c
@@ -142,6 +142,7 @@ lookup_statevar(const char *var, GLint index1, GLint index2, const char *field,
       tokens[1] = index1;
    }
    else if (strcmp(var, "gl_Point") == 0) {
+      assert(field);
       if (strcmp(field, "size") == 0) {
          tokens[0] = STATE_POINT_SIZE;
          *swizzleOut = SWIZZLE_XXXX;
@@ -181,6 +182,7 @@ lookup_statevar(const char *var, GLint index1, GLint index2, const char *field,
          tokens[1] = 0;
       else
          tokens[1] = 1;
+      assert(field);
       if (strcmp(field, "emission") == 0) {
          tokens[2] = STATE_EMISSION;
       }
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 6d1cea28a7..ecb2f6d5c1 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -1754,7 +1754,7 @@ swizzle_to_writemask(slang_assemble_ctx *A, GLuint swizzle,
          /* end */
          break;
       }
-      assert(swz >= 0 && swz <= 3);
+      assert(swz <= 3);
 
       if (swizzle != SWIZZLE_XXXX &&
           swizzle != SWIZZLE_YYYY &&
@@ -1894,6 +1894,7 @@ _slang_gen_asm(slang_assemble_ctx *A, slang_operation *oper,
       _mesa_problem(NULL, "undefined __asm function %s\n",
                     (char *) oper->a_id);
       assert(info);
+      return NULL;
    }
    assert(info->NumParams <= 3);
 
@@ -4207,7 +4208,7 @@ swizzle_size(GLuint swizzle)
    GLuint size = 0, i;
    for (i = 0; i < 4; i++) {
       GLuint swz = GET_SWZ(swizzle, i);
-      size += (swz >= 0 && swz <= 3);
+      size += (swz <= 3);
    }
    return size;
 }