anemet updated this revision to Diff 67379.
anemet added a comment.
Address Aaron's comment
https://reviews.llvm.org/D23284
Files:
include/clang/Basic/DiagnosticDriverKinds.td
include/clang/Driver/Options.td
include/clang/Frontend/CodeGenOptions.def
lib/CodeGen/CodeGenAction.cpp
lib/Frontend/CompilerInvocation.cpp
test/Frontend/Inputs/optimization-remark-with-hotness.proftext
test/Frontend/optimization-remark-with-hotness.c
Index: test/Frontend/optimization-remark-with-hotness.c
===================================================================
--- /dev/null
+++ test/Frontend/optimization-remark-with-hotness.c
@@ -0,0 +1,41 @@
+// RUN: llvm-profdata merge \
+// RUN: %S/Inputs/optimization-remark-with-hotness.proftext \
+// RUN: -o %t.profdata
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
+// RUN: optimization-remark-with-hotness.c %s -emit-llvm-only \
+// RUN: -fprofile-instrument-use-path=%t.profdata -Rpass=inline \
+// RUN: -Rpass-analysis=inline -Rpass-with-hotness -verify
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
+// RUN: optimization-remark-with-hotness.c %s -emit-llvm-only \
+// RUN: -fprofile-instrument-use-path=%t.profdata -Rpass=inline \
+// RUN: -Rpass-analysis=inline 2>&1 | FileCheck -check-prefix=HOTNESS_OFF %s
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
+// RUN: optimization-remark-with-hotness.c %s -emit-llvm-only \
+// RUN: -fprofile-instrument-use-path=%t.profdata -Rpass=inline \
+// RUN: -Rpass-analysis=inline -Rno-pass-with-hotness 2>&1 | FileCheck \
+// RUN: -check-prefix=HOTNESS_OFF %s
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
+// RUN: optimization-remark-with-hotness.c %s -emit-llvm-only \
+// RUN: -Rpass=inline -Rpass-analysis=inline -Rpass-with-hotness 2>&1 \
+// RUN: | FileCheck -check-prefix=NO_PGO %s
+
+int foo(int x, int y) __attribute__((always_inline));
+int foo(int x, int y) { return x + y; }
+
+int sum = 0;
+
+void bar(int x) {
+ // HOTNESS_OFF: foo inlined into bar
+ // HOTNESS_OFF-NOT: hotness:
+ // NO_PGO: '-Rpass-with-hotness' requires profile-guided optimization information
+ // expected-remark@+2 {{foo should always be inlined (cost=always) (hotness: 30)}}
+ // expected-remark@+1 {{foo inlined into bar (hotness: 30)}}
+ sum += foo(x, x - 2);
+}
+
+int main(int argc, const char *argv[]) {
+ for (int i = 0; i < 30; i++)
+ // expected-remark@+1 {{bar should never be inlined}}
+ bar(argc);
+ return sum;
+}
Index: test/Frontend/Inputs/optimization-remark-with-hotness.proftext
===================================================================
--- /dev/null
+++ test/Frontend/Inputs/optimization-remark-with-hotness.proftext
@@ -0,0 +1,25 @@
+foo
+# Func Hash:
+0
+# Num Counters:
+1
+# Counter Values:
+30
+
+bar
+# Func Hash:
+0
+# Num Counters:
+1
+# Counter Values:
+30
+
+main
+# Func Hash:
+4
+# Num Counters:
+2
+# Counter Values:
+1
+30
+
Index: lib/Frontend/CompilerInvocation.cpp
===================================================================
--- lib/Frontend/CompilerInvocation.cpp
+++ lib/Frontend/CompilerInvocation.cpp
@@ -818,6 +818,13 @@
NeedLocTracking = true;
}
+ Opts.PassRemarksWithHotness =
+ Args.hasFlag(options::OPT_Rpass_with_hotness,
+ options::OPT_Rno_pass_with_hotness, /*default*/ false);
+ if (Opts.PassRemarksWithHotness &&
+ Opts.getProfileUse() == CodeGenOptions::ProfileNone)
+ Diags.Report(diag::warn_drv_rpass_with_hotness_requires_pgo);
+
// If the user requested to use a sample profile for PGO, then the
// backend will need to track source location information so the profile
// can be incorporated into the IR.
Index: lib/CodeGen/CodeGenAction.cpp
===================================================================
--- lib/CodeGen/CodeGenAction.cpp
+++ lib/CodeGen/CodeGenAction.cpp
@@ -179,6 +179,7 @@
Ctx.getDiagnosticHandler();
void *OldDiagnosticContext = Ctx.getDiagnosticContext();
Ctx.setDiagnosticHandler(DiagnosticHandler, this);
+ Ctx.setDiagnosticHotnessRequested(CodeGenOpts.PassRemarksWithHotness);
// Link LinkModule into this module if present, preserving its validity.
for (auto &I : LinkModules) {
@@ -511,9 +512,16 @@
FullSourceLoc Loc = getBestLocationFromDebugLoc(D, BadDebugInfo, Filename,
Line, Column);
+ std::string Msg;
+ raw_string_ostream MsgStream(Msg);
+ MsgStream << D.getMsg().str();
+
+ if (D.getHotness())
+ MsgStream << " (hotness: " << *D.getHotness() << ")";
+
Diags.Report(Loc, DiagID)
<< AddFlagValue(D.getPassName() ? D.getPassName() : "")
- << D.getMsg().str();
+ << MsgStream.str();
if (BadDebugInfo)
// If we were not able to translate the file:line:col information
Index: include/clang/Frontend/CodeGenOptions.def
===================================================================
--- include/clang/Frontend/CodeGenOptions.def
+++ include/clang/Frontend/CodeGenOptions.def
@@ -237,6 +237,9 @@
/// filename)
VALUE_CODEGENOPT(EmitCheckPathComponentsToStrip, 32, 0)
+/// Whether to report the hotness of the code region for optimization remarks.
+CODEGENOPT(PassRemarksWithHotness, 1, 0)
+
#undef CODEGENOPT
#undef ENUM_CODEGENOPT
#undef VALUE_CODEGENOPT
Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -303,6 +303,12 @@
"name matches the given POSIX regular expression">;
def R_Joined : Joined<["-"], "R">, Group<R_Group>, Flags<[CC1Option, CoreOption]>,
MetaVarName<"<remark>">, HelpText<"Enable the specified remark">;
+// Don't include in R_Group, since this does not enable any remark group.
+def Rpass_with_hotness : Flag<["-"], "Rpass-with-hotness">, Flags<[CC1Option]>,
+ HelpText<"If profile-guided optimization information is available, "
+ "include hotness of transformed code region in messages "
+ "reported by -Rpass* options">;
+def Rno_pass_with_hotness : Flag<["-"], "Rno-pass-with-hotness">, Flags<[CC1Option]>;
def S : Flag<["-"], "S">, Flags<[DriverOption,CC1Option]>, Group<Action_Group>,
HelpText<"Only run preprocess and compilation steps">;
def Tbss : JoinedOrSeparate<["-"], "Tbss">, Group<T_Group>;
Index: include/clang/Basic/DiagnosticDriverKinds.td
===================================================================
--- include/clang/Basic/DiagnosticDriverKinds.td
+++ include/clang/Basic/DiagnosticDriverKinds.td
@@ -182,6 +182,9 @@
def warn_drv_empty_joined_argument : Warning<
"joined argument expects additional value: '%0'">,
InGroup<UnusedCommandLineArgument>;
+def warn_drv_rpass_with_hotness_requires_pgo : Warning<
+ "argument '-Rpass-with-hotness' requires profile-guided optimization information">,
+ InGroup<UnusedCommandLineArgument>;
def warn_drv_clang_unsupported : Warning<
"the clang compiler does not support '%0'">;
def warn_drv_deprecated_arg : Warning<
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