[Clang][MemProf] Add end-to-end test for PGHO rewriting

clang/test/CodeGen/memprof-pgho.cpp

@@ -0,0 +1,61 @@
+// Test end-to-end optimization pipeline with PGHO, that it does not interfere
+// with other allocation instrumentation features.
+//
+// RUN: split-file %s %t
+// RUN: llvm-profdata merge %t/memprof.yaml -o %t/use.profdata
+// RUN: %clang_cc1 -O2 -debug-info-kind=limited -fmemory-profile-use=%t/use.profdata -mllvm -optimize-hot-cold-new \
+// RUN:            %t/src.cpp -triple x86_64-linux-gnu -emit-llvm -o - | FileCheck %s --check-prefixes=CHECK,DEFAULT
+// RUN: %clang_cc1 -O2 -fsanitize=alloc-token -debug-info-kind=limited -fmemory-profile-use=%t/use.profdata -mllvm -optimize-hot-cold-new \
+// RUN:             %t/src.cpp -triple x86_64-linux-gnu -emit-llvm -o - | FileCheck %s --check-prefixes=CHECK,ALLOCTOKEN
+
+//--- memprof.yaml
+---
+HeapProfileRecords:
+  - GUID: 0x7f8d88fcc70a347b
+    AllocSites:
+    - Callstack:
+      - { Function: 0x7f8d88fcc70a347b, LineOffset: 1, Column: 10, IsInlineFrame: false }
+      - { Function: 0xdb956436e78dd5fa, LineOffset: 1, Column: 13, IsInlineFrame: false }
+      MemInfoBlock:
+        AllocCount: 1
+        TotalAccessCount: 0
+        MinAccessCount: 0
+        MaxAccessCount: 0
+        TotalSize: 10
+        MinSize: 10
+        MaxSize: 10
+        AllocTimestamp: 100
+        DeallocTimestamp: 100
+        TotalLifetime: 100000
+        MinLifetime: 100000
+        MaxLifetime: 100000
+        AllocCpuId: 0
+        DeallocCpuId: 0
+        NumMigratedCpu: 0
+        NumLifetimeOverlaps: 0
+        NumSameAllocCpu: 0
+        NumSameDeallocCpu: 0
+        DataTypeId: 0
+        TotalAccessDensity: 0
+        MinAccessDensity: 0
+        MaxAccessDensity: 0
+        TotalLifetimeAccessDensity: 0
+        MinLifetimeAccessDensity: 0
+        MaxLifetimeAccessDensity: 0
+        AccessHistogramSize: 0
+        AccessHistogram: 0
+...
+
+//--- src.cpp
+// CHECK-LABEL: define{{.*}} ptr @_Z3foov()
+// DEFAULT:    call {{.*}} ptr @_Znam12__hot_cold_t(i64 10, i8 -128)
+// ALLOCTOKEN: call {{.*}} ptr @__alloc_token__Znam12__hot_cold_t(i64 10, i8 -128, i64 1538840549748785101){{.*}} !alloc_token
+char *foo() {
+  return new char[10];
+}
+
+int main() {
+  char *a = foo();
+  delete[] a;
+  return 0;
+}