diff --unified --recursive --text mesa.org/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp mesa.new/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
--- mesa.org/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp	2021-06-18 12:47:17.096083970 +0200
+++ mesa.new/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp	2021-06-18 12:51:39.656887107 +0200
@@ -351,7 +351,8 @@
     */
    TargetOptions options;
 #if defined(PIPE_ARCH_X86)
-   options.StackAlignmentOverride = 4;
+   //  options.StackAlignmentOverride = 4; 
+   // fails with llvm 13 , see https://gitlab.freedesktop.org/mesa/mesa/-/issues/4906
 #endif
 
    builder.setEngineKind(EngineKind::JIT)