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| author | Justin Bogner <mail@justinbogner.com> | 2014-04-11 23:06:35 +0000 |
|---|---|---|
| committer | Justin Bogner <mail@justinbogner.com> | 2014-04-11 23:06:35 +0000 |
| commit | 191ec63b718d85b3445bfb29b01a3f4ddee989e2 (patch) | |
| tree | 25412712fe5b7b729b3c63afb93f1c394c719bb6 /clang/test/Profile/cxx-lambda.cpp | |
| parent | b60e61c15fce38f031576adb7bd2d78b3382a916 (diff) | |
| download | llvm-191ec63b718d85b3445bfb29b01a3f4ddee989e2.zip llvm-191ec63b718d85b3445bfb29b01a3f4ddee989e2.tar.gz llvm-191ec63b718d85b3445bfb29b01a3f4ddee989e2.tar.bz2 | |
CodeGen: Fix handling of C++11 lambdas in profiling
Until now we were generating duplicate counters for lambdas: one set
in the function where the lambda was declared and another for the
lambda itself. Instead, we should skip over the bodies of lambdas in
their containing contexts.
llvm-svn: 206081
Diffstat (limited to 'clang/test/Profile/cxx-lambda.cpp')
| -rw-r--r-- | clang/test/Profile/cxx-lambda.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/clang/test/Profile/cxx-lambda.cpp b/clang/test/Profile/cxx-lambda.cpp new file mode 100644 index 0000000..1389f024 --- /dev/null +++ b/clang/test/Profile/cxx-lambda.cpp @@ -0,0 +1,57 @@ +// Tests for instrumentation of C++11 lambdas + +// RUN: %clang_cc1 -x c++ %s -triple %itanium_abi_triple -main-file-name cxx-lambda.cpp -std=c++11 -o - -emit-llvm -fprofile-instr-generate > %tgen +// RUN: FileCheck --input-file=%tgen -check-prefix=PGOGEN %s +// RUN: FileCheck --input-file=%tgen -check-prefix=LMBGEN %s + +// RUN: %clang_cc1 -x c++ %s -triple %itanium_abi_triple -main-file-name cxx-lambda.cpp -std=c++11 -o - -emit-llvm -fprofile-instr-use=%S/Inputs/cxx-lambda.profdata > %tuse +// RUN: FileCheck --input-file=%tuse -check-prefix=PGOUSE %s +// RUN: FileCheck --input-file=%tuse -check-prefix=LMBUSE %s + +// PGOGEN: @[[LWC:__llvm_profile_counters__Z7lambdasv]] = global [4 x i64] zeroinitializer +// PGOGEN: @[[MAC:__llvm_profile_counters_main]] = global [1 x i64] zeroinitializer +// LMBGEN: @[[LFC:"__llvm_profile_counters__ZZ7lambdasvENK3\$_0clEi"]] = internal global [3 x i64] zeroinitializer + +// PGOGEN-LABEL: define void @_Z7lambdasv() +// PGOUSE-LABEL: define void @_Z7lambdasv() +// PGOGEN: store {{.*}} @[[LWC]], i64 0, i64 0 +void lambdas() { + int i = 1; + + // LMBGEN-LABEL: define internal zeroext i1 @"_ZZ7lambdasvENK3$_0clEi"( + // LMBUSE-LABEL: define internal zeroext i1 @"_ZZ7lambdasvENK3$_0clEi"( + // LMBGEN: store {{.*}} @[[LFC]], i64 0, i64 0 + auto f = [&i](int k) { + // LMBGEN: store {{.*}} @[[LFC]], i64 0, i64 1 + // LMBUSE: br {{.*}} !prof ![[LF1:[0-9]+]] + if (i > 0) {} + // LMBGEN: store {{.*}} @[[LFC]], i64 0, i64 2 + // LMBUSE: br {{.*}} !prof ![[LF2:[0-9]+]] + return k && i; + }; + + // PGOGEN: store {{.*}} @[[LWC]], i64 0, i64 1 + // PGOUSE: br {{.*}} !prof ![[LW1:[0-9]+]] + if (i) {} + + // PGOGEN: store {{.*}} @[[LWC]], i64 0, i64 2 + // PGOUSE: br {{.*}} !prof ![[LW2:[0-9]+]] + for (i = 0; i < 10; ++i) + f(9 - i); + + // PGOGEN: store {{.*}} @[[LWC]], i64 0, i64 3 + // PGOUSE: br {{.*}} !prof ![[LW3:[0-9]+]] + if (i) {} +} + +// PGOUSE-DAG: ![[LW1]] = metadata !{metadata !"branch_weights", i32 2, i32 1} +// PGOUSE-DAG: ![[LW2]] = metadata !{metadata !"branch_weights", i32 11, i32 2} +// PGOUSE-DAG: ![[LW3]] = metadata !{metadata !"branch_weights", i32 2, i32 1} + +// LMBUSE-DAG: ![[LF1]] = metadata !{metadata !"branch_weights", i32 10, i32 2} +// LMBUSE-DAG: ![[LF2]] = metadata !{metadata !"branch_weights", i32 10, i32 2} + +int main(int argc, const char *argv[]) { + lambdas(); + return 0; +} |