[PATCH v3 4/5] vkd3d-shader/hlsl: Always cast to bool in if() statements.

[Zebediah Figura]

From: Zebediah Figura

We emit sm4 if_nz for these, but that does a bitwise comparison to zero, which is wrong for floats.
---
 libs/vkd3d-shader/hlsl.y | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 110db99da..e3dc2d92c 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -6707,6 +6707,15 @@ selection_statement:
                 }
             }

+            check_condition_type(ctx, condition);
+
+            if (!(condition = add_cast(ctx, $4, condition, hlsl_get_scalar_type(ctx, HLSL_TYPE_BOOL), &@4)))
+            {
+                destroy_block($6.then_block);
+                destroy_block($6.else_block);
+                YYABORT;
+            }
+
             if (!(instr = hlsl_new_if(ctx, condition, $6.then_block, $6.else_block, &@2)))
             {
                 destroy_block($6.then_block);
@@ -6716,8 +6725,6 @@ selection_statement:
             destroy_block($6.then_block);
             destroy_block($6.else_block);

-            check_condition_type(ctx, condition);
-
             $$ = $4;
             hlsl_block_add_instr($$, instr);
         }