Add support for Freeze instruction in WIAnalysis pass

This change enables the `WIAnalysis` pass to correctly handle `Freeze`
instructions. Without this enhancement, there is a risk of mistakenly
identifying non-uniform allocas as uniform.

(cherry picked from commit db79415)

Author: aratajew

IGC/Compiler/CISACodeGen/WIAnalysis.cpp

@@ -842,6 +842,7 @@ void WIAnalysisRunner::calculate_dep(const Value* val)
         else if (const VAArgInst* VAI = dyn_cast<VAArgInst>(inst))                  dep = calculate_dep(VAI);
 #if LLVM_VERSION_MAJOR >= 10
         else if (inst->getOpcode() == Instruction::FNeg)                            dep = calculate_dep_simple(inst);
+        else if (inst->getOpcode() == Instruction::Freeze)                          dep = calculate_dep_simple(inst);
 #endif
 
         if (m_func->hasFnAttribute("KMPLOCK"))

IGC/Compiler/tests/WIAnalysis/alloca-freeze.ll

@@ -0,0 +1,40 @@
+;=========================== begin_copyright_notice ============================
+;
+; Copyright (C) 2025 Intel Corporation
+;
+; SPDX-License-Identifier: MIT
+;
+;============================ end_copyright_notice =============================
+
+; REQUIRES: llvm-14-plus, regkeys
+; RUN: igc_opt --opaque-pointers --igc-pressure-printer -S --disable-output --regkey=RegPressureVerbocity=1 < %s 2>&1 | FileCheck %s
+
+; ------------------------------------------------
+; WIAnalysis
+; ------------------------------------------------
+
+; This test checks whether the 'alloca' instruction is correctly identified as non-uniform when non-uniform
+; value stored in it goes through a freeze instruction.
+
+; CHECK: N: {{.*}} %a = alloca i16, align 2
+
+; Function Attrs: convergent nounwind
+define spir_kernel void @test_uniform(<8 x i32> %r0, <8 x i32> %payloadHeader, i16 %localIdX, i32 %bufferOffset) {
+entry:
+  %a = alloca i16
+  %freezed_lid = freeze i16 %localIdX
+  store i16 %freezed_lid, i16* %a, align 2
+  ret void
+}
+
+!igc.functions = !{!358}
+
+!358 = !{void (<8 x i32>, <8 x i32>, i32)* @test_uniform, !359}
+!359 = !{!360, !361}
+!360 = !{!"function_type", i32 0}
+!361 = !{!"implicit_arg_desc", !362, !363, !366, !364}
+!362 = !{i32 0}
+!363 = !{i32 1}
+!364 = !{i32 15, !365}
+!365 = !{!"explicit_arg_num", i32 0}
+!366 = !{i32 8}