Enable partial vectorization inside IGCVectorizer

Enable partial vectorization inside IGCVectorizer

Author: esukhov

IGC/Compiler/tests/IGCVectorizer/vectorizer-test-binary-fmul.ll

@@ -1,4 +1,5 @@
-; RUN: igc_opt -S  --igc-vectorizer -dce < %s 2>&1 | FileCheck %s
+; REQUIRES: pvc-supported, regkeys
+; RUN: igc_opt -S  --igc-vectorizer -dce --regkey=VectorizerEnablePartialVectorization=0 < %s 2>&1 | FileCheck %s
 
 ; CHECK: %vectorized_phi
 ; CHECK: %vector = insertelement <8 x float> undef

IGC/Compiler/tests/IGCVectorizer/vectorizer-test-ugly-chain.ll

@@ -1,4 +1,5 @@
-; RUN: igc_opt -S  --igc-vectorizer -dce < %s 2>&1 | FileCheck %s
+; REQUIRES: pvc-supported, regkeys
+; RUN: igc_opt -S  --igc-vectorizer -dce --regkey=VectorizerEnablePartialVectorization=0 < %s 2>&1 | FileCheck %s
 
 ; CHECK: %vectorized_phi
 ; CHECK: %vector = insertelement <8 x float> undef

IGC/common/igc_flags.h

@@ -552,7 +552,7 @@ DECLARE_IGC_REGKEY(bool, VectorizerAllowEXP2, false, "Allow EXP2 instructions in
 DECLARE_IGC_REGKEY(bool, VectorizerAllowMAXNUM, false, "Allow MAXNUM instructions inside vectorizer", true)
 DECLARE_IGC_REGKEY(bool, VectorizerAllowFMADMatching, true, "Allow FADD and FMUL instructions to be matched later in the pattern match pass", true)
 DECLARE_IGC_REGKEY(bool, VectorizerUniformValueVectorizationEnabled, true, "Vector Emitter emits vectorized instruction for uniform values", true)
-DECLARE_IGC_REGKEY(bool, VectorizerEnablePartialVectorization, false, "Not fully tested option, allows to substitute scalar part with partially vectorized through extract elements", true)
+DECLARE_IGC_REGKEY(bool, VectorizerEnablePartialVectorization, true, "Not fully tested option, allows to substitute scalar part with partially vectorized through extract elements", true)
 DECLARE_IGC_REGKEY(bool, DisableOCLScalarizer,          false, "Disable ScalarizeFunction pass in OCL pipeline", true)
 DECLARE_IGC_REGKEY(bool, DisablePHIScalarization,       false, "Disable scalarization of PHINode instructions", true)
 DECLARE_IGC_REGKEY(bool, EnableSelectiveScalarizer,     false,  "enable selective scalarizer on GPGPU path", true)