[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-13 Thread Amy Huang via Phabricator via cfe-commits 
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGae6523cd62a4: [DebugInfo] Add -fuse-ctor-homing cc1 flag so 
we can turn on constructor homing… (authored by akhuang).

Changed prior to commit:
  https://reviews.llvm.org/D85799?vs=285214=285513#toc

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Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp


Index: clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
===
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
@@ -0,0 +1,20 @@
+// RUN: %clang -cc1 -debug-info-kind=constructor -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=limited -fuse-ctor-homing -emit-llvm %s 
-o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=standalone -fuse-ctor-homing -emit-llvm 
%s -o - \
+// RUN:| FileCheck %s -check-prefix=FULL_DEBUG
+// RUN: %clang -cc1 -debug-info-kind=line-tables-only -fuse-ctor-homing 
-emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+// RUN: %clang -cc1 -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+
+// This tests that the -fuse-ctor-homing is only used if limited debug info 
would have
+// been used otherwise.
+
+// CTOR_HOMING: !DICompositeType(tag: DW_TAG_structure_type, name: 
"A"{{.*}}flags: DIFlagFwdDecl
+// FULL_DEBUG: !DICompositeType(tag: DW_TAG_structure_type, name: 
"A"{{.*}}DIFlagTypePassByValue
+// NO_DEBUG-NOT: !DICompositeType(tag: DW_TAG_structure_type, name: "A"
+struct A {
+  A();
+} TestA;
Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+  Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
+
   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
 unsigned Val = llvm::StringSwitch(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
Index: clang/include/clang/Driver/Options.td
===
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3691,6 +3691,8 @@
   AutoNormalizeEnum;
 def fno_math_builtin : Flag<["-"], "fno-math-builtin">,
   HelpText<"Disable implicit builtin knowledge of math functions">;
+def fuse_ctor_homing: Flag<["-"], "fuse-ctor-homing">,
+HelpText<"Use constructor homing if we are using limited debug info 
already">;
 }
 
 def disable_llvm_verifier : Flag<["-"], "disable-llvm-verifier">,


Index: clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
===
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
@@ -0,0 +1,20 @@
+// RUN: %clang -cc1 -debug-info-kind=constructor -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=limited -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=standalone -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=FULL_DEBUG
+// RUN: %clang -cc1 -debug-info-kind=line-tables-only -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+// RUN: %clang -cc1 -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+
+// This tests that the -fuse-ctor-homing is only used if limited debug info would have
+// been used otherwise.
+
+// CTOR_HOMING: !DICompositeType(tag: DW_TAG_structure_type, name: "A"{{.*}}flags: DIFlagFwdDecl
+// FULL_DEBUG: !DICompositeType(tag: DW_TAG_structure_type, name: "A"{{.*}}DIFlagTypePassByValue
+// NO_DEBUG-NOT: !DICompositeType(tag: DW_TAG_structure_type, name: "A"
+struct A {
+  A();
+} TestA;
Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  //

[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread David Blaikie via Phabricator via cfe-commits 
dblaikie accepted this revision.
dblaikie added a comment.
This revision is now accepted and ready to land.

Looks great, thanks!


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[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread Amy Huang via Phabricator via cfe-commits 
akhuang updated this revision to Diff 285214.
akhuang added a comment.

Add more extensive check that -fuse-ctor-homing only does something when 
-debug-info-kind=limited


Repository:
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Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp


Index: clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
===
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
@@ -0,0 +1,22 @@
+// RUN: %clang -cc1 -debug-info-kind=constructor -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=limited -fuse-ctor-homing -emit-llvm %s 
-o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=standalone -fuse-ctor-homing -emit-llvm 
%s -o - \
+// RUN:| FileCheck %s -check-prefix=FULL_DEBUG
+// RUN: %clang -cc1 -debug-info-kind=line-tables-only -fuse-ctor-homing 
-emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+// RUN: %clang -cc1 -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+
+
+// This tests that the -fuse-ctor-homing is only used if limited debug info 
would have
+// been used otherwise.
+
+// CTOR_HOMING: !DICompositeType(tag: DW_TAG_structure_type, name: 
"A"{{.*}}flags: DIFlagFwdDecl
+// FULL_DEBUG: !DICompositeType(tag: DW_TAG_structure_type, name: 
"A"{{.*}}DIFlagTypePassByValue
+// NO_DEBUG-NOT: !DICompositeType(tag: DW_TAG_structure_type, name: "A"
+struct A {
+  A();
+} TestA;
+
Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+  Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
+
   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
 unsigned Val = llvm::StringSwitch(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
Index: clang/include/clang/Driver/Options.td
===
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3691,6 +3691,8 @@
   AutoNormalizeEnum;
 def fno_math_builtin : Flag<["-"], "fno-math-builtin">,
   HelpText<"Disable implicit builtin knowledge of math functions">;
+def fuse_ctor_homing: Flag<["-"], "fuse-ctor-homing">,
+HelpText<"Use constructor homing if we are using limited debug info 
already">;
 }
 
 def disable_llvm_verifier : Flag<["-"], "disable-llvm-verifier">,


Index: clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
===
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-ctor-homing-flag.cpp
@@ -0,0 +1,22 @@
+// RUN: %clang -cc1 -debug-info-kind=constructor -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=limited -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=CTOR_HOMING
+// RUN: %clang -cc1 -debug-info-kind=standalone -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=FULL_DEBUG
+// RUN: %clang -cc1 -debug-info-kind=line-tables-only -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+// RUN: %clang -cc1 -fuse-ctor-homing -emit-llvm %s -o - \
+// RUN:| FileCheck %s -check-prefix=NO_DEBUG
+
+
+// This tests that the -fuse-ctor-homing is only used if limited debug info would have
+// been used otherwise.
+
+// CTOR_HOMING: !DICompositeType(tag: DW_TAG_structure_type, name: "A"{{.*}}flags: DIFlagFwdDecl
+// FULL_DEBUG: !DICompositeType(tag: DW_TAG_structure_type, name: "A"{{.*}}DIFlagTypePassByValue
+// NO_DEBUG-NOT: !DICompositeType(tag: DW_TAG_structure_type, name: "A"
+struct A {
+  A();
+} TestA;
+
Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+

[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread Amy Huang via Phabricator via cfe-commits 
akhuang added a comment.

In D85799#2214330 , @dblaikie wrote:

> If possible, could you test the negative cases too? That -fuse-ctor-homing 
> doesn't override -debug-info-kind=line-tables-only or no -debug-info-kind at 
> all?

Oh, good point.


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[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread David Blaikie via Phabricator via cfe-commits 
dblaikie added a comment.

If possible, could you test the negative cases too? That -fuse-ctor-homing 
doesn't override -debug-info-kind=line-tables-only or no -debug-info-kind at 
all?


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[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread Amy Huang via Phabricator via cfe-commits 
akhuang added a comment.

Yep, just added a line to the existing ctor homing test case.


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[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread Amy Huang via Phabricator via cfe-commits 
akhuang updated this revision to Diff 285203.
akhuang added a comment.

Add test case.


Repository:
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Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/test/CodeGenCXX/debug-info-limited-ctor.cpp


Index: clang/test/CodeGenCXX/debug-info-limited-ctor.cpp
===
--- clang/test/CodeGenCXX/debug-info-limited-ctor.cpp
+++ clang/test/CodeGenCXX/debug-info-limited-ctor.cpp
@@ -1,5 +1,8 @@
 // RUN: %clang -cc1 -debug-info-kind=constructor -emit-llvm %s -o - | 
FileCheck %s
 
+// This tests the -fuse-ctor-homing flag.
+// RUN: %clang -cc1 -fuse-ctor-homing -debug-info-kind=limited -emit-llvm %s 
-o - | FileCheck %s
+
 // CHECK-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: 
"A"{{.*}}DIFlagTypePassByValue
 struct A {
 } TestA;
Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+  Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
+
   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
 unsigned Val = llvm::StringSwitch(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
Index: clang/include/clang/Driver/Options.td
===
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3691,6 +3691,8 @@
   AutoNormalizeEnum;
 def fno_math_builtin : Flag<["-"], "fno-math-builtin">,
   HelpText<"Disable implicit builtin knowledge of math functions">;
+def fuse_ctor_homing: Flag<["-"], "fuse-ctor-homing">,
+HelpText<"Use constructor homing if we are using limited debug info 
already">;
 }
 
 def disable_llvm_verifier : Flag<["-"], "disable-llvm-verifier">,


Index: clang/test/CodeGenCXX/debug-info-limited-ctor.cpp
===
--- clang/test/CodeGenCXX/debug-info-limited-ctor.cpp
+++ clang/test/CodeGenCXX/debug-info-limited-ctor.cpp
@@ -1,5 +1,8 @@
 // RUN: %clang -cc1 -debug-info-kind=constructor -emit-llvm %s -o - | FileCheck %s
 
+// This tests the -fuse-ctor-homing flag.
+// RUN: %clang -cc1 -fuse-ctor-homing -debug-info-kind=limited -emit-llvm %s -o - | FileCheck %s
+
 // CHECK-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "A"{{.*}}DIFlagTypePassByValue
 struct A {
 } TestA;
Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+  Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
+
   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
 unsigned Val = llvm::StringSwitch(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
Index: clang/include/clang/Driver/Options.td
===
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3691,6 +3691,8 @@
   AutoNormalizeEnum;
 def fno_math_builtin : Flag<["-"], "fno-math-builtin">,
   HelpText<"Disable implicit builtin knowledge of math functions">;
+def fuse_ctor_homing: Flag<["-"], "fuse-ctor-homing">,
+HelpText<"Use constructor homing if we are using limited debug info already">;
 }
 
 def disable_llvm_verifier : Flag<["-"], "disable-llvm-verifier">,
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[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-12 Thread David Blaikie via Phabricator via cfe-commits 
dblaikie added a comment.

Looks good! Could you add a test case for this too?


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[PATCH] D85799: [DebugInfo] Add -fuse-ctor-homing cc1 flag so we can turn on constructor homing only if limited debug info is already on.

2020-08-11 Thread Amy Huang via Phabricator via cfe-commits 
akhuang created this revision.
akhuang added reviewers: dblaikie, aprantl, MaskRay.
Herald added subscribers: cfe-commits, dang.
Herald added a project: clang.
akhuang requested review of this revision.

This adds a cc1 flag to enable constructor homing but doesn't turn on debug
info if it wasn't enabled already (which is what using
-debug-info-kind=constructor does). This will be used for testing, and won't
be needed anymore once ctor homing is used as default / merged into =limited.

Bug to enable ctor homing: https://bugs.llvm.org/show_bug.cgi?id=46537


Repository:
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https://reviews.llvm.org/D85799

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Frontend/CompilerInvocation.cpp


Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+  Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
+
   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
 unsigned Val = llvm::StringSwitch(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
Index: clang/include/clang/Driver/Options.td
===
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3691,6 +3691,8 @@
   AutoNormalizeEnum;
 def fno_math_builtin : Flag<["-"], "fno-math-builtin">,
   HelpText<"Disable implicit builtin knowledge of math functions">;
+def fuse_ctor_homing: Flag<["-"], "fuse-ctor-homing">,
+HelpText<"Use constructor homing if we are using limited debug info 
already">;
 }
 
 def disable_llvm_verifier : Flag<["-"], "disable-llvm-verifier">,


Index: clang/lib/Frontend/CompilerInvocation.cpp
===
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,12 @@
 else
   Opts.setDebugInfo(static_cast(Val));
   }
+  // If -fuse-ctor-homing is set and limited debug info is already on, then use
+  // constructor homing.
+  if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
+  Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
+
   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
 unsigned Val = llvm::StringSwitch(A->getValue())
.Case("gdb", unsigned(llvm::DebuggerKind::GDB))
Index: clang/include/clang/Driver/Options.td
===
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3691,6 +3691,8 @@
   AutoNormalizeEnum;
 def fno_math_builtin : Flag<["-"], "fno-math-builtin">,
   HelpText<"Disable implicit builtin knowledge of math functions">;
+def fuse_ctor_homing: Flag<["-"], "fuse-ctor-homing">,
+HelpText<"Use constructor homing if we are using limited debug info already">;
 }
 
 def disable_llvm_verifier : Flag<["-"], "disable-llvm-verifier">,
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