[clang] 2520bef - [Clang FE, SystemZ] Recognize -mrecord-mcount CL option.
Jonas Paulsson via cfe-commits
cfe-commits at lists.llvm.org
Thu Dec 19 08:53:16 PST 2019
Author: Jonas Paulsson
Date: 2019-12-19T08:51:55-08:00
New Revision: 2520bef865329d4c04e2de30c222ad0d5ad13ccc
URL: https://github.com/llvm/llvm-project/commit/2520bef865329d4c04e2de30c222ad0d5ad13ccc
DIFF: https://github.com/llvm/llvm-project/commit/2520bef865329d4c04e2de30c222ad0d5ad13ccc.diff
LOG: [Clang FE, SystemZ] Recognize -mrecord-mcount CL option.
Recognize -mrecord-mcount from the command line and add a function attribute
"mrecord-mcount" when passed.
Only valid on SystemZ (when used with -mfentry).
Review: Ulrich Weigand
https://reviews.llvm.org/D71627
Added:
clang/test/CodeGen/mrecord-mcount.c
Modified:
clang/include/clang/Basic/CodeGenOptions.def
clang/include/clang/Driver/Options.td
clang/lib/CodeGen/CodeGenFunction.cpp
clang/lib/Driver/ToolChains/Clang.cpp
clang/lib/Frontend/CompilerInvocation.cpp
Removed:
################################################################################
diff --git a/clang/include/clang/Basic/CodeGenOptions.def b/clang/include/clang/Basic/CodeGenOptions.def
index c6700333c13a..7f26ca8b4d61 100644
--- a/clang/include/clang/Basic/CodeGenOptions.def
+++ b/clang/include/clang/Basic/CodeGenOptions.def
@@ -113,6 +113,7 @@ VALUE_CODEGENOPT(XRayInstructionThreshold , 32, 200)
CODEGENOPT(InstrumentForProfiling , 1, 0) ///< Set when -pg is enabled.
CODEGENOPT(CallFEntry , 1, 0) ///< Set when -mfentry is enabled.
CODEGENOPT(MNopMCount , 1, 0) ///< Set when -mnop-mcount is enabled.
+CODEGENOPT(RecordMCount , 1, 0) ///< Set when -mrecord-mcount is enabled.
CODEGENOPT(PackedStack , 1, 0) ///< Set when -mpacked-stack is enabled.
CODEGENOPT(LessPreciseFPMAD , 1, 0) ///< Enable less precise MAD instructions to
///< be generated.
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 2a72b87355d0..86aee334436a 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -2477,6 +2477,8 @@ def mfentry : Flag<["-"], "mfentry">, HelpText<"Insert calls to fentry at functi
Flags<[CC1Option]>, Group<m_Group>;
def mnop_mcount : Flag<["-"], "mnop-mcount">, HelpText<"Generate mcount/__fentry__ calls as nops. To activate they need to be patched in.">,
Flags<[CC1Option]>, Group<m_Group>;
+def mrecord_mcount : Flag<["-"], "mrecord-mcount">, HelpText<"Generate a __mcount_loc section entry for each __fentry__ call.">,
+ Flags<[CC1Option]>, Group<m_Group>;
def mpacked_stack : Flag<["-"], "mpacked-stack">, HelpText<"Use packed stack layout (SystemZ only).">,
Flags<[CC1Option]>, Group<m_Group>;
def mips16 : Flag<["-"], "mips16">, Group<m_mips_Features_Group>;
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 89ce31e9b450..6f7e06b773dc 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -968,6 +968,17 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
<< "-mnop-mcount" << "-mfentry";
Fn->addFnAttr("mnop-mcount");
}
+
+ if (CGM.getCodeGenOpts().RecordMCount) {
+ if (getContext().getTargetInfo().getTriple().getArch() !=
+ llvm::Triple::systemz)
+ CGM.getDiags().Report(diag::err_opt_not_valid_on_target)
+ << "-mrecord-mcount";
+ if (!CGM.getCodeGenOpts().CallFEntry)
+ CGM.getDiags().Report(diag::err_opt_not_valid_without_opt)
+ << "-mrecord-mcount" << "-mfentry";
+ Fn->addFnAttr("mrecord-mcount");
+ }
}
}
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index a79c96d25d98..6b93dc2939e1 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -4990,6 +4990,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
if (TC.SupportsProfiling())
Args.AddLastArg(CmdArgs, options::OPT_mnop_mcount);
+ if (TC.SupportsProfiling())
+ Args.AddLastArg(CmdArgs, options::OPT_mrecord_mcount);
+
Args.AddLastArg(CmdArgs, options::OPT_mpacked_stack);
if (Args.getLastArg(options::OPT_fapple_kext) ||
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index d68244dce5c4..93193edff9c9 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1104,6 +1104,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
Opts.CallFEntry = Args.hasArg(OPT_mfentry);
Opts.MNopMCount = Args.hasArg(OPT_mnop_mcount);
+ Opts.RecordMCount = Args.hasArg(OPT_mrecord_mcount);
Opts.PackedStack = Args.hasArg(OPT_mpacked_stack);
Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
diff --git a/clang/test/CodeGen/mrecord-mcount.c b/clang/test/CodeGen/mrecord-mcount.c
new file mode 100644
index 000000000000..eecee0e24cdc
--- /dev/null
+++ b/clang/test/CodeGen/mrecord-mcount.c
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -pg -mfentry -mrecord-mcount -triple s390x-ibm-linux -emit-llvm \
+// RUN: -o - %s 2>&1 | FileCheck %s
+// RUN: not %clang_cc1 -pg -mrecord-mcount -triple s390x-ibm-linux -emit-llvm -o - \
+// RUN: %s 2>&1 | FileCheck -check-prefix=NOMFENTRY %s
+// RUN: %clang_cc1 -mfentry -mrecord-mcount -triple s390x-ibm-linux -emit-llvm -o - \
+// RUN: %s 2>&1 | FileCheck -check-prefix=NOPG %s
+// RUN: %clang_cc1 -mrecord-mcount -triple s390x-ibm-linux -emit-llvm -o - %s \
+// RUN: 2>&1 | FileCheck -check-prefix=NOPG %s
+// RUN: not %clang_cc1 -pg -mfentry -mrecord-mcount -triple x86_64-linux-gnu \
+// RUN: -emit-llvm -o - %s 2>&1 | FileCheck -check-prefix=X86 %s
+
+int foo(void) {
+ return 0;
+}
+
+int __attribute__((no_instrument_function)) no_instrument(void) {
+ return foo();
+}
+
+//CHECK: attributes #0 = { {{.*}}"mrecord-mcount"{{.*}} }
+//CHECK: attributes #1 = { {{.*}} }
+//CHECK-NOT: attributes #1 = { {{.*}}"mrecord-mcount"{{.*}} }
+//NOMFENTRY: error: option '-mrecord-mcount' cannot be specified without '-mfentry'
+//NOPG-NOT: attributes #0 = { {{.*}}"mrecord-mcount"{{.*}} }
+//NOPG-NOT: attributes #1 = { {{.*}}"mrecord-mcount"{{.*}} }
+//X86: error: option '-mrecord-mcount' cannot be specified on this target
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