[Beignet] [PATCH 5/5] GBE: decrease the loop unrolling threshold to 640.

[Zhigang Gong]

1024 is some how too large for some kernels and may cause
some kernels fail to build due to lack of enough scratching
space.

Signed-off-by: Zhigang Gong <zhigang.gong at intel.com>
---
 backend/src/llvm/llvm_to_gen.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backend/src/llvm/llvm_to_gen.cpp b/backend/src/llvm/llvm_to_gen.cpp
index 24d4be7..551fd31 100644
--- a/backend/src/llvm/llvm_to_gen.cpp
+++ b/backend/src/llvm/llvm_to_gen.cpp
@@ -144,7 +144,7 @@ namespace gbe
     MPM.add(createIndVarSimplifyPass());        // Canonicalize indvars
     MPM.add(createLoopIdiomPass());             // Recognize idioms like memset.
     MPM.add(createLoopDeletionPass());          // Delete dead loops
-    MPM.add(createLoopUnrollPass(1024)); //1024, 32, 1024, 512)); //Unroll loops
+    MPM.add(createLoopUnrollPass(640)); //1024, 32, 1024, 512)); //Unroll loops
     if(optLevel > 0) {
       MPM.add(createSROAPass(/*RequiresDomTree*/ false));
       MPM.add(createGVNPass());                 // Remove redundancies
-- 
1.9.1