d4efc3e097
Currently, WebAssembly/WASI target does not provide direct support for
code coverage.
This patch set fixes several issues to unlock the feature. The main
changes are:
1. Port `compiler-rt/lib/profile` to WebAssembly/WASI.
2. Adjust profile metadata sections for Wasm object file format.
- [CodeGen] Emit `__llvm_covmap` and `__llvm_covfun` as custom sections
instead of data segments.
- [lld] Align the interval space of custom sections at link time.
- [llvm-cov] Copy misaligned custom section data if the start address is
not aligned.
- [llvm-cov] Read `__llvm_prf_names` from data segments
3. [clang] Link with profile runtime libraries if requested
See each commit message for more details and rationale.
This is part of the effort to add code coverage support in Wasm target
of Swift toolchain.
120 lines
7.0 KiB
LLVM
120 lines
7.0 KiB
LLVM
;; Test runtime symbols and various linkages.
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; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -passes=instrprof -S | FileCheck %s --check-prefixes=MACHO
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; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -S | FileCheck %s --check-prefixes=ELF,ELFRT
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; RUN: opt < %s -mtriple=x86_64-unknown-fuchsia -passes=instrprof -S | FileCheck %s --check-prefixes=ELF,ELFRT
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; RUN: opt < %s -mtriple=x86_64-scei-ps4 -passes=instrprof -S | FileCheck %s --check-prefixes=ELF,PS
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; RUN: opt < %s -mtriple=x86_64-sie-ps5 -passes=instrprof -S | FileCheck %s --check-prefixes=ELF,PS
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; RUN: opt < %s -mtriple=x86_64-pc-win32-coff -passes=instrprof -S | FileCheck %s --check-prefixes=COFF
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; RUN: opt < %s -mtriple=powerpc64-ibm-aix-xcoff -passes=instrprof -S | FileCheck %s --check-prefixes=XCOFF
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; RUN: opt < %s -mtriple=x86_64-pc-freebsd13 -passes=instrprof -S | FileCheck %s --check-prefixes=ELF
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; RUN: opt < %s -mtriple=wasm32-unknown-unknown -passes=instrprof -S | FileCheck %s --check-prefix=WASM
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; MACHO: @__llvm_profile_runtime = external hidden global i32
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; ELF-NOT: @__llvm_profile_runtime = external global i32
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; XCOFF-NOT: @__llvm_profile_runtime = external hidden global i32
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; COFF: @__llvm_profile_runtime = external hidden global i32
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; WASM: @__llvm_profile_runtime = external hidden global i32
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; ELF: $__profc_foo = comdat nodeduplicate
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; ELF: $__profc_foo_weak = comdat nodeduplicate
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; ELF: $"__profc_linkage.ll:foo_internal" = comdat nodeduplicate
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; ELF: $__profc_foo_inline = comdat nodeduplicate
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; ELF: $__profc_foo_extern = comdat any
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@__profn_foo = private constant [3 x i8] c"foo"
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@__profn_foo_weak = weak hidden constant [8 x i8] c"foo_weak"
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@"__profn_linkage.ll:foo_internal" = private constant [23 x i8] c"linkage.ll:foo_internal"
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@__profn_foo_inline = linkonce_odr hidden constant [10 x i8] c"foo_inline"
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@__profn_foo_extern = linkonce_odr hidden constant [10 x i8] c"foo_extern"
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; ELF: @__profc_foo = private global {{.*}} section "__llvm_prf_cnts", comdat
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; ELF: @__profd_foo = private global {{.*}} section "__llvm_prf_data", comdat($__profc_foo)
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; MACHO: @__profc_foo = private global
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; MACHO: @__profd_foo = private global
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; COFF: @__profc_foo = private global
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; COFF-NOT: comdat
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; COFF: @__profd_foo = private global
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; XCOFF: @__profc_foo = private global
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; XCOFF-NOT: comdat
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; XCOFF: @__profd_foo = private global
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define void @foo() {
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call void @llvm.instrprof.increment(ptr @__profn_foo, i64 0, i32 1, i32 0)
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ret void
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}
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; ELF: @__profc_foo_weak = weak hidden global{{.*}}section "__llvm_prf_cnts", comdat, align 8
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; ELF: @__profd_foo_weak = private global{{.*}}section "__llvm_prf_data", comdat($__profc_foo_weak)
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; MACHO: @__profc_foo_weak = weak hidden global
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; MACHO: @__profd_foo_weak = weak hidden global
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; COFF: @__profc_foo_weak = weak hidden global
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; COFF: @__profd_foo_weak = private global
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; XCOFF: @__profc_foo_weak = private global
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; XCOFF: @__profd_foo_weak = private global
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define weak void @foo_weak() {
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call void @llvm.instrprof.increment(ptr @__profn_foo_weak, i64 0, i32 1, i32 0)
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ret void
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}
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; ELF: @"__profc_linkage.ll:foo_internal" = private global{{.*}}section "__llvm_prf_cnts", comdat, align 8
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; ELF: @"__profd_linkage.ll:foo_internal" = private global{{.*}}section "__llvm_prf_data", comdat($"__profc_linkage.ll:foo_internal"), align 8
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; MACHO: @"__profc_linkage.ll:foo_internal" = private global
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; MACHO: @"__profd_linkage.ll:foo_internal" = private global
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; COFF: @"__profc_linkage.ll:foo_internal" = private global
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; COFF: @"__profd_linkage.ll:foo_internal" = private global
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; XCOFF: @"__profc_linkage.ll:foo_internal" = private global
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; XCOFF: @"__profd_linkage.ll:foo_internal" = private global
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define internal void @foo_internal() {
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call void @llvm.instrprof.increment(ptr @"__profn_linkage.ll:foo_internal", i64 0, i32 1, i32 0)
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ret void
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}
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; ELF: @__profc_foo_inline = linkonce_odr hidden global{{.*}}section "__llvm_prf_cnts", comdat, align 8
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; ELF: @__profd_foo_inline = private global{{.*}}section "__llvm_prf_data", comdat($__profc_foo_inline), align 8
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; MACHO: @__profc_foo_inline = linkonce_odr hidden global
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; MACHO: @__profd_foo_inline = linkonce_odr hidden global
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; COFF: @__profc_foo_inline = linkonce_odr hidden global{{.*}} section ".lprfc$M", align 8
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; COFF: @__profd_foo_inline = private global{{.*}} section ".lprfd$M", align 8
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; XCOFF: @__profc_foo_inline = private global
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; XCOFF: @__profd_foo_inline = private global
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define linkonce_odr void @foo_inline() {
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call void @llvm.instrprof.increment(ptr @__profn_foo_inline, i64 0, i32 1, i32 0)
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ret void
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}
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; ELF: @__profc_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_cnts", comdat, align 8
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; ELF: @__profd_foo_extern = private global {{.*}}section "__llvm_prf_data", comdat($__profc_foo_extern), align 8
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; MACHO: @__profc_foo_extern = linkonce_odr hidden global
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; MACHO: @__profd_foo_extern = linkonce_odr hidden global
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; COFF: @__profc_foo_extern = linkonce_odr hidden global {{.*}}section ".lprfc$M", comdat, align 8
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; COFF: @__profd_foo_extern = internal global {{.*}}section ".lprfd$M", comdat($__profc_foo_extern), align 8
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; XCOFF: @__profc_foo_extern = private global
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; XCOFF: @__profd_foo_extern = private global
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define available_externally void @foo_extern() {
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call void @llvm.instrprof.increment(ptr @__profn_foo_extern, i64 0, i32 1, i32 0)
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ret void
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}
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declare void @llvm.instrprof.increment(ptr, i64, i32, i32)
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; ELF: @llvm.compiler.used = appending global {{.*}} [{{.*}}ptr @__profd_foo, ptr @__profd_foo_weak, ptr @"__profd_linkage.ll:foo_internal", ptr @__profd_foo_inline, ptr @__profd_foo_extern{{.*}}]
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; MACHO: @llvm.compiler.used = appending global [6 x ptr] [ptr @__llvm_profile_runtime_user, ptr @__profd_foo, {{.*}}
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; COFF: @llvm.compiler.used = appending global [6 x ptr] [ptr @__llvm_profile_runtime_user, ptr @__profd_foo, ptr @__profd_foo_weak, ptr @"__profd_linkage.ll:foo_internal", ptr @__profd_foo_inline, ptr @__profd_foo_extern]
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; XCOFF: @llvm.used = appending global [6 x ptr] [ptr @__profd_foo, ptr @__profd_foo_weak, ptr @"__profd_linkage.ll:foo_internal", ptr @__profd_foo_inline, ptr @__profd_foo_extern, ptr @__llvm_prf_nm]
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; WASM: @llvm.used = appending global [7 x ptr] [ptr @__llvm_profile_runtime_user, ptr @__profd_foo, ptr @__profd_foo_weak, ptr @"__profd_linkage.ll:foo_internal", ptr @__profd_foo_inline, ptr @__profd_foo_extern, ptr @__llvm_prf_nm]
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; MACHO: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
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; MACHO: %[[REG:.*]] = load i32, ptr @__llvm_profile_runtime
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; MACHO: ret i32 %[[REG]]
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; MACHO: }
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; COFF: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} comdat {
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; ELFRT-NOT: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
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; ELFRT-NOT: %[[REG:.*]] = load i32, ptr @__llvm_profile_runtime
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; PS: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
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; PS: %[[REG:.*]] = load i32, ptr @__llvm_profile_runtime
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; XCOFF-NOT: define .* __llvm_profile_runtime_user
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; WASM-NOT: internal void @__llvm_profile_register_functions()
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; XCOFF-NOT: internal void @__llvm_profile_register_functions()
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