16e74fd489
New change on top of [reviewed patch](https://github.com/llvm/llvm-project/pull/81691) are [in commits after this one](d0757f46b3). Previous commits are restored from the remote branch with timestamps. 1. Fix build breakage for non-ELF platforms, by defining the missing functions {`__llvm_profile_begin_vtables`, `__llvm_profile_end_vtables`, `__llvm_profile_begin_vtabnames `, `__llvm_profile_end_vtabnames`} everywhere. * Tested on mac laptop (for darwins) and Windows. Specifically, functions in `InstrProfilingPlatformWindows.c` returns `NULL` to make it more explicit that type prof isn't supported; see comments for the reason. * For the rest (AIX, other), mostly follow existing examples (like this [one](f95b2f1acf)) 2. Rename `__llvm_prf_vtabnames` -> `__llvm_prf_vns` for shorter section name, and make returned pointers [const](a825d2a4ec (diff-4de780ce726d76b7abc9d3353aef95013e7b21e7bda01be8940cc6574fb0b5ffR120-R121)) **Original Description** * Raw profile format - Header: records the byte size of compressed vtable names, and the number of profiled vtable entries (call it `VTableProfData`). Header also records padded bytes of each section. - Payload: adds a section for compressed vtable names, and a section to store `VTableProfData`. Both sections are padded so the size is a multiple of 8. * Indexed profile format - Header: records the byte offset of compressed vtable names. - Payload: adds a section to store compressed vtable names. This section is used by `llvm-profdata` to show the list of vtables profiled for an instrumented site. [The originally reviewed patch](https://github.com/llvm/llvm-project/pull/66825) will have profile reader/write change and llvm-profdata change. - To ensure this PR has all the necessary profile format change along with profile version bump, created a copy of the originally reviewed patch in https://github.com/llvm/llvm-project/pull/80761. The copy doesn't have profile format change, but it has the set of tests which covers type profile generation, profile read and profile merge. Tests pass there. rfc in https://discourse.llvm.org/t/rfc-dynamic-type-profiling-and-optimizations-in-llvm/74600 --------- Co-authored-by: modiking <modiking213@gmail.com>
26 lines
1.2 KiB
LLVM
26 lines
1.2 KiB
LLVM
; RUN: opt < %s -passes=pgo-instr-gen,instrprof -S | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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$foo = comdat any
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; CHECK: $foo = comdat any
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; CHECK: $__llvm_profile_raw_version = comdat any
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; CHECK: $__profc__stdin__foo.[[#FOO_HASH:]] = comdat any
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@bar = global ptr @foo, align 8
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; CHECK: @__llvm_profile_raw_version = hidden constant i64 {{[0-9]+}}, comdat
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; CHECK-NOT: __profn__stdin__foo
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; CHECK: @__profc__stdin__foo.[[#FOO_HASH]] = private global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", comdat, align 8
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; CHECK: @__profd__stdin__foo.[[#FOO_HASH]] = private global { i64, i64, i64, i64, ptr, ptr, i32, [3 x i16], i32 } { i64 {{.*}}, i64 [[#FOO_HASH]], i64 sub (i64 ptrtoint (ptr @__profc__stdin__foo.742261418966908927 to i64), i64 ptrtoint (ptr @__profd__stdin__foo.742261418966908927 to i64)), i64 0, ptr null
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; CHECK-NOT: @foo
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; CHECK-SAME: , ptr null, i32 1, [3 x i16] zeroinitializer, i32 0 }, section "__llvm_prf_data", comdat($__profc__stdin__foo.[[#FOO_HASH]]), align 8
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; CHECK: @__llvm_prf_nm
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; CHECK: @llvm.compiler.used
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define internal i32 @foo() comdat {
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entry:
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ret i32 1
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}
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