Disable Predicate Add match temporarily to bypass regression

Change-Id: I6bf9efcb9a2c6f6ee0951179888a761dd62fd73b

Author: iwwu

IGC/common/igc_flags.def

@@ -89,7 +89,7 @@ DECLARE_IGC_REGKEY(bool, DisableEmptyBlockRemoval,      false, "Setting this to
 DECLARE_IGC_REGKEY(bool, DisableSIMD32Slicing,          false, "Setting this to 1/true adds a compiler switch to disable emitting SIMD32 VISA code in slices")
 DECLARE_IGC_REGKEY(bool, DisableMatchMad,               false, "Setting this to 1/true adds a compiler switch to disable mul+add = mad optimization")
 DECLARE_IGC_REGKEY(bool, EnableIntegerMad,              false, "Setting this to 1/true adds a compiler switch to enable integer mul+add = mad optimization")
-DECLARE_IGC_REGKEY(bool, DisableMatchPredAdd,           false, "Setting this to 1/true adds a compiler switch to disable pred+add = predAdd optimization")
+DECLARE_IGC_REGKEY(bool, DisableMatchPredAdd,           true,  "Setting this to 1/true adds a compiler switch to disable pred+add = predAdd optimization")
 DECLARE_IGC_REGKEY(bool, DisableMatchPow,               false, "Setting this to 1/true adds a compiler switch to disable log2/mul/exp2 = pow optimization")
 DECLARE_IGC_REGKEY(bool, DisableIRVerification,         false, "Setting this to 1/true adds a compiler switch to disable IGC IR verification.")
 DECLARE_IGC_REGKEY(bool, DisableLoopUnroll,             false, "Setting this to 1/true adds a compiler switch to disable loop unrolling.")