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-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_misc.cpp13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
index 843a14a500c..0ccf6a698bd 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
@@ -73,6 +73,19 @@ lp_set_target_options(void)
#endif
#endif
+ /*
+ * LLVM revision 123367 switched the default stack alignment to 16 bytes on
+ * Linux (and several other Unices in later revisions), to match recent gcc
+ * versions.
+ *
+ * However our drivers can be loaded by old binary applications, still
+ * maintaining a 4 bytes stack alignment. Therefore we must tell LLVM here
+ * to only assume a 4 bytes alignment for backwards compatibility.
+ */
+#if defined(PIPE_ARCH_X86)
+ llvm::StackAlignment = 4;
+#endif
+
#if defined(DEBUG) || defined(PROFILE)
llvm::NoFramePointerElim = true;
#endif