Mesa (master): tgsi: fix false CondStackTop==0 assertion

[Brian Paul]

Module: Mesa
Branch: master
Commit: 4b2b5f8e30347ce0a1818524f8825335d47eb5ca
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4b2b5f8e30347ce0a1818524f8825335d47eb5ca

Author: Brian Paul <brianp at vmware.com>
Date:   Sun Aug 22 18:40:48 2010 -0600

tgsi: fix false CondStackTop==0 assertion

---

 src/gallium/auxiliary/tgsi/tgsi_exec.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 298f3d0..0757f05 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -3239,6 +3239,8 @@ exec_instruction(
 
          if (mach->CallStackTop == 0) {
             /* returning from main() */
+            mach->CondStackTop = 0;
+            mach->LoopStackTop = 0;
             *pc = -1;
             return;
          }
@@ -3767,6 +3769,9 @@ tgsi_exec_machine_run( struct tgsi_exec_machine *mach )
    }
 #endif
 
+   /* Strictly speaking, these assertions aren't really needed but they
+    * can potentially catch some bugs in the control flow code.
+    */
    assert(mach->CondStackTop == 0);
    assert(mach->LoopStackTop == 0);
    assert(mach->ContStackTop == 0);