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The API verification tool tapi has difficulty processing frameworks which enable code coverage, but which have no code. The profile lowering pass does not emit the runtime hook in this case because no counters are lowered. While the hook is not needed for program correctness (the profile runtime doesn't have to be linked in), it's needed to allow tapi to validate the exported symbol set of instrumented binaries. It was not possible to add a workaround in tapi for empty binaries due to an architectural issue: tapi generates its expected symbol set before it inspects a binary. Changing that model has a higher cost than simply forcing llvm to always emit the runtime hook. rdar://36076904 Differential Revision: https://reviews.llvm.org/D43794 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326350 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
3.4 KiB
LLVM
65 lines
3.4 KiB
LLVM
;; Check that runtime symbols get appropriate linkage.
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; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s --check-prefix=OTHER --check-prefix=COMMON
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; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s --check-prefix=LINUX --check-prefix=COMMON
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; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -passes=instrprof -S | FileCheck %s --check-prefix=OTHER --check-prefix=COMMON
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; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -S | FileCheck %s --check-prefix=LINUX --check-prefix=COMMON
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; RUN: opt < %s -mtriple=x86_64-pc-win32-coff -instrprof -S | FileCheck %s --check-prefix=COFF
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; RUN: opt < %s -mtriple=x86_64-pc-win32-coff -passes=instrprof -S | FileCheck %s --check-prefix=COFF
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; OTHER: @__llvm_profile_runtime = external global i32
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; LINUX-NOT: @__llvm_profile_runtime = external global i32
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@__profn_foo = hidden 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" = internal 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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; COMMON: @__profc_foo = hidden global
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; COMMON: @__profd_foo = hidden global
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define void @foo() {
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call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__profn_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
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ret void
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}
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; COMMON: @__profc_foo_weak = weak hidden global
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; COMMON: @__profd_foo_weak = weak hidden global
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define weak void @foo_weak() {
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call void @llvm.instrprof.increment(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @__profn_foo_weak, i32 0, i32 0), i64 0, i32 1, i32 0)
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ret void
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}
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; COMMON: @"__profc_linkage.ll:foo_internal" = internal global
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; COMMON: @"__profd_linkage.ll:foo_internal" = internal global
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define internal void @foo_internal() {
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call void @llvm.instrprof.increment(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @"__profn_linkage.ll:foo_internal", i32 0, i32 0), i64 0, i32 1, i32 0)
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ret void
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}
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; COMMON: @__profc_foo_inline = linkonce_odr hidden global
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; COMMON: @__profd_foo_inline = linkonce_odr hidden global
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define linkonce_odr void @foo_inline() {
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call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @__profn_foo_inline, i32 0, i32 0), i64 0, i32 1, i32 0)
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ret void
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}
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; LINUX: @__profc_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_cnts", comdat($__profv_foo_extern), align 8
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; LINUX: @__profd_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_data", comdat($__profv_foo_extern), align 8
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; OTHER: @__profc_foo_extern = linkonce_odr hidden global
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; OTHER: @__profd_foo_extern = linkonce_odr hidden global
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define available_externally void @foo_extern() {
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call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @__profn_foo_extern, i32 0, i32 0), 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(i8*, i64, i32, i32)
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; OTHER: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
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; OTHER: %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime
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; OTHER: ret i32 %[[REG]]
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; OTHER: }
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; COFF: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} comdat {
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; LINUX-NOT: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
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; LINUX-NOT: %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime
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