X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fgmqcc.git;a=blobdiff_plain;f=ast.c;h=bcc2f8ef3f4bc4fb3887facfa047a6c6c6fef712;hp=7a8f6cc1c57fab709dea8e31b069fce2699d12b6;hb=24fc2e5146d7ebb213b2690ed99c8eb61cafd81e;hpb=d6ca5673dc7f2760faca1200477808d919a290ca

diff --git a/ast.c b/ast.c
index 7a8f6cc..bcc2f8e 100644
--- a/ast.c
+++ b/ast.c
@@ -26,6 +26,7 @@
 
 #include "gmqcc.h"
 #include "ast.h"
+#include "parser.h"
 
 #define ast_instantiate(T, ctx, destroyfn)                          \
     T* self = (T*)mem_a(sizeof(T));                                 \
@@ -1221,7 +1222,7 @@ void ast_function_delete(ast_function *self)
     mem_d(self);
 }
 
-static const char* ast_function_label(ast_function *self, const char *prefix)
+const char* ast_function_label(ast_function *self, const char *prefix)
 {
     size_t id;
     size_t len;
@@ -2513,6 +2514,7 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
     ir_block *ontrue_endblock = NULL;
     ir_block *onfalse_endblock = NULL;
     ir_block *merge = NULL;
+    int       fold  = 0;
 
     /* We don't output any value, thus also don't care about r/lvalue */
     (void)out;
@@ -2531,8 +2533,10 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
     /* update the block which will get the jump - because short-logic or ternaries may have changed this */
     cond = func->curblock;
 
-    /* on-true path */
-
+    /* try constant folding away the if */
+    if ((fold = fold_cond(condval, func, self)) != -1)
+        return fold;
+    
     if (self->on_true) {
         /* create on-true block */
         ontrue = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "ontrue"));