[llvm] [llvm-profgen] Support creating profiles of arbitrary events (PR #99026)

[Wei Xiao via llvm-commits]

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@@ -0,0 +1,78 @@
+// RUN: llvm-profgen --format=text --perfscript=%S/Inputs/cmov_3.perfscript --binary=%S/Inputs/cmov_3.perfbin --output=%t --skip-symbolization --perf-event=br_inst_retired.near_taken:upp
+// RUN: FileCheck %s --input-file %t --check-prefix=CHECK-RAW-PROFILE
+// RUN: llvm-profgen --format=text --perfscript=%S/Inputs/cmov_3.perfscript --binary=%S/Inputs/cmov_3.perfbin --output=%t --perf-event=br_inst_retired.near_taken:upp
+// RUN: FileCheck %s --input-file %t --check-prefix=CHECK
+
+// RUN: llvm-profgen --format=text --perfscript=%S/Inputs/cmov_3.perfscript --binary=%S/Inputs/cmov_3.perfbin --output=%t --skip-symbolization --perf-event=br_misp_retired.all_branches:upp --leading-ip-only
+// RUN: FileCheck %s --input-file %t --check-prefix=UNPRED-RAW-PROFILE
+// RUN: llvm-profgen --format=text --perfscript=%S/Inputs/cmov_3.perfscript --binary=%S/Inputs/cmov_3.perfbin --output=%t --perf-event=br_misp_retired.all_branches:upp --leading-ip-only
+// RUN: FileCheck %s --input-file %t --check-prefix=UNPRED
+
+// Check that we can use perf event filtering to generate multiple types of
+// source-level profiles from a single perf profile. In this case, we generate
+// a typical execution frequency profile using br_inst_retired.near_taken LBRs,
+// and a branch mispredict profile using br_misp_retired.all_branches sample
+// IPs.
+
+// The source example below is based on perfKernelCpp/cmov_3, except a
+// misleading builtin is used to persuade the compiler not to use cmov, which
+// induces branch mispredicts.
+
+// CHECK: sel_arr:20229:0
+// CHECK:  3.1: 627
+// CHECK:  3.2: 627
+// CHECK:  4: 615
+// CHECK:  5: 627
+
+// UNPRED: sel_arr:18:0
+// UNPRED:  3.1: 0
+// UNPRED:  3.2: 0
+// UNPRED:  4: 9
+// UNPRED:  5: 0
+
+// CHECK-RAW-PROFILE:      3
+// CHECK-RAW-PROFILE-NEXT: 2f0-2fa:303
+// CHECK-RAW-PROFILE-NEXT: 2f0-310:312
+// CHECK-RAW-PROFILE-NEXT: 2ff-310:315
+
+// UNPRED-RAW-PROFILE:      1
+// UNPRED-RAW-PROFILE-NEXT: 2fa-2fa:9
+
+// original code:
+// icx -fprofile-sample-generate lit.c
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williamweixiao wrote:

icx?

https://github.com/llvm/llvm-project/pull/99026