[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-14 Thread John McCall via Phabricator via cfe-commits 
rjmccall added a comment.

Yeah, I think the test is probably a bit abusive to run unconditionally for all 
hosts.  We can just know that we improved things, and if we regress, it will 
break them again.


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https://reviews.llvm.org/D5



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[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-14 Thread Yaxun Liu via Phabricator via cfe-commits 
yaxunl added a comment.

I have to remove the lit test since it causes failure on atom 
http://lab.llvm.org:8011/builders/clang-atom-d525-fedora-rel/builds/15477

It seems when the lit test is running on atom, it is compiled with default CPU 
for x86_64, therefor __atom__ is not defined and there is no way to detect the 
test is running on atom system.


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[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-14 Thread Yaxun Liu via Phabricator via cfe-commits 
This revision was automatically updated to reflect the committed changes.
Closed by commit rC327515: CodeGen: Reduce LValue and CallArgList memory 
footprint before recommitting… (authored by yaxunl, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D5?vs=138252&id=138358#toc

Repository:
  rC Clang

https://reviews.llvm.org/D5

Files:
  lib/CodeGen/CGCall.h
  lib/CodeGen/CGValue.h


Index: lib/CodeGen/CGValue.h
===
--- lib/CodeGen/CGValue.h
+++ lib/CodeGen/CGValue.h
@@ -193,7 +193,7 @@
 
   // The alignment to use when accessing this lvalue.  (For vector elements,
   // this is the alignment of the whole vector.)
-  int64_t Alignment;
+  unsigned Alignment;
 
   // objective-c's ivar
   bool Ivar:1;
@@ -215,13 +215,13 @@
   // to make the default bitfield pattern all-zeroes.
   bool ImpreciseLifetime : 1;
 
-  LValueBaseInfo BaseInfo;
-  TBAAAccessInfo TBAAInfo;
-
   // This flag shows if a nontemporal load/stores should be used when accessing
   // this lvalue.
   bool Nontemporal : 1;
 
+  LValueBaseInfo BaseInfo;
+  TBAAAccessInfo TBAAInfo;
+
   Expr *BaseIvarExp;
 
 private:
@@ -231,7 +231,10 @@
"initializing l-value with zero alignment!");
 this->Type = Type;
 this->Quals = Quals;
-this->Alignment = Alignment.getQuantity();
+const unsigned MaxAlign = 1U << 31;
+this->Alignment = Alignment.getQuantity() <= MaxAlign
+  ? Alignment.getQuantity()
+  : MaxAlign;
 assert(this->Alignment == Alignment.getQuantity() &&
"Alignment exceeds allowed max!");
 this->BaseInfo = BaseInfo;
Index: lib/CodeGen/CGCall.h
===
--- lib/CodeGen/CGCall.h
+++ lib/CodeGen/CGCall.h
@@ -224,7 +224,7 @@
   /// CallArgList - Type for representing both the value and type of
   /// arguments in a call.
   class CallArgList :
-public SmallVector {
+public SmallVector {
   public:
 CallArgList() : StackBase(nullptr) {}
 


Index: lib/CodeGen/CGValue.h
===
--- lib/CodeGen/CGValue.h
+++ lib/CodeGen/CGValue.h
@@ -193,7 +193,7 @@
 
   // The alignment to use when accessing this lvalue.  (For vector elements,
   // this is the alignment of the whole vector.)
-  int64_t Alignment;
+  unsigned Alignment;
 
   // objective-c's ivar
   bool Ivar:1;
@@ -215,13 +215,13 @@
   // to make the default bitfield pattern all-zeroes.
   bool ImpreciseLifetime : 1;
 
-  LValueBaseInfo BaseInfo;
-  TBAAAccessInfo TBAAInfo;
-
   // This flag shows if a nontemporal load/stores should be used when accessing
   // this lvalue.
   bool Nontemporal : 1;
 
+  LValueBaseInfo BaseInfo;
+  TBAAAccessInfo TBAAInfo;
+
   Expr *BaseIvarExp;
 
 private:
@@ -231,7 +231,10 @@
"initializing l-value with zero alignment!");
 this->Type = Type;
 this->Quals = Quals;
-this->Alignment = Alignment.getQuantity();
+const unsigned MaxAlign = 1U << 31;
+this->Alignment = Alignment.getQuantity() <= MaxAlign
+  ? Alignment.getQuantity()
+  : MaxAlign;
 assert(this->Alignment == Alignment.getQuantity() &&
"Alignment exceeds allowed max!");
 this->BaseInfo = BaseInfo;
Index: lib/CodeGen/CGCall.h
===
--- lib/CodeGen/CGCall.h
+++ lib/CodeGen/CGCall.h
@@ -224,7 +224,7 @@
   /// CallArgList - Type for representing both the value and type of
   /// arguments in a call.
   class CallArgList :
-public SmallVector {
+public SmallVector {
   public:
 CallArgList() : StackBase(nullptr) {}
 
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[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-13 Thread John McCall via Phabricator via cfe-commits 
rjmccall accepted this revision.
rjmccall added a comment.
This revision is now accepted and ready to land.

Thank you.  LGTM.


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[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-13 Thread Yaxun Liu via Phabricator via cfe-commits 
yaxunl updated this revision to Diff 138252.
yaxunl marked an inline comment as done.
yaxunl added a comment.

Saturate alignment when it is too large.


https://reviews.llvm.org/D5

Files:
  lib/CodeGen/CGCall.h
  lib/CodeGen/CGValue.h
  test/CodeGenCXX/deep-ast-tree.cpp

Index: test/CodeGenCXX/deep-ast-tree.cpp
===
--- /dev/null
+++ test/CodeGenCXX/deep-ast-tree.cpp
@@ -0,0 +1,262 @@
+// RUN: %clang_cc1 %s
+// This test will cause clang to generate a deep AST tree with many CallArgs.
+// This is to make sure there is no stack overflow for such situations.
+// It is based on a use case in Eigen: 
+// https://eigen.tuxfamily.org/dox/group__TutorialAdvancedInitialization.html
+//
+struct VectorBuilder {
+  VectorBuilder &operator,(int);
+};
+void f() {
+  VectorBuilder(),
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,

[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-13 Thread John McCall via Phabricator via cfe-commits 
rjmccall added inline comments.



Comment at: lib/CodeGen/CGValue.h:234
 this->Quals = Quals;
 this->Alignment = Alignment.getQuantity();
 assert(this->Alignment == Alignment.getQuantity() &&

Please saturate Alignment here instead of allowing it to be truncated: that is, 
if the passed-in alignment is greater than (1U << 31), please store (1U << 31).


https://reviews.llvm.org/D5



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[PATCH] D44445: CodeGen: Reduce LValue and CallArgList memory footprint before recommitting r326946

2018-03-13 Thread Yaxun Liu via Phabricator via cfe-commits 
yaxunl created this revision.
yaxunl added reviewers: rsmith, rjmccall.

Recent change r326946 (https://reviews.llvm.org/D34367) causes regression in 
Eigen due to increased
memory footprint of CallArg.

This patch reduces LValue size from 112 to 96 bytes and reduces inline argument 
count of CallArgList
from 16 to 8.

It has been verified that this will let the added deep AST tree test pass with 
r326946.

In the long run, CallArg or LValue memory footprint should be further optimized.


https://reviews.llvm.org/D5

Files:
  lib/CodeGen/CGCall.h
  lib/CodeGen/CGValue.h
  test/CodeGenCXX/deep-ast-tree.cpp

Index: test/CodeGenCXX/deep-ast-tree.cpp
===
--- /dev/null
+++ test/CodeGenCXX/deep-ast-tree.cpp
@@ -0,0 +1,262 @@
+// RUN: %clang_cc1 %s
+// This test will cause clang to generate a deep AST tree with many CallArgs.
+// This is to make sure there is no stack overflow for such situations.
+// It is based on a use case in Eigen: 
+// https://eigen.tuxfamily.org/dox/group__TutorialAdvancedInitialization.html
+//
+struct VectorBuilder {
+  VectorBuilder &operator,(int);
+};
+void f() {
+  VectorBuilder(),
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
+  1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,
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