Only emit debug info for implicit members that actually get codegen, not just ODR use.

This includes special members (copy/default ctor, copy assign, default
ctor) and template specializations for member function templates.

Good for a 5% decrease (1.80 to 1.71 GB) in size on Clang+LLVM's .dwo
files (when using fission).

llvm-svn: 188085

1 files changed, 7 insertions, 11 deletions

diff --git a/clang/test/CodeGenCXX/debug-lambda-expressions.cpp b/clang/test/CodeGenCXX/debug-lambda-expressions.cpp
index 39c9a44..bca7a8d 100644
--- a/clang/test/CodeGenCXX/debug-lambda-expressions.cpp
+++ b/clang/test/CodeGenCXX/debug-lambda-expressions.cpp
@@ -12,7 +12,7 @@ int b(int x) { return [x]{return x;}(); }
 int c(int x) { return [&x]{return x;}(); }
 
 struct D { D(); D(const D&); int x; };
-int d(int x) { D y[10]; [x,y] { return y[x].x; }(); }
+int d(int x) { D y[10]; return [x,y] { return y[x].x; }(); }
 
 // Randomness for file. -- 6
 // CHECK: [[FILE:.*]] = {{.*}} [ DW_TAG_file_type ] [{{.*}}debug-lambda-expressions.cpp]
@@ -31,41 +31,37 @@ int d(int x) { D y[10]; [x,y] { return y[x].x; }(); }
 
 // Back to D. -- 24
 // CHECK: [[LAM_D:.*]] = {{.*}}, metadata [[D_FUNC]], {{.*}}, metadata [[LAM_D_ARGS:.*]], i32 0, null, null} ; [ DW_TAG_class_type ] [line [[D_LINE]],
-// CHECK: [[LAM_D_ARGS]] = metadata !{metadata [[CAP_D_X:.*]], metadata [[CAP_D_Y:.*]], metadata [[CON_LAM_D:.*]], metadata [[DES_LAM_D:.*]]}
+// CHECK: [[LAM_D_ARGS]] = metadata !{metadata [[CAP_D_X:.*]], metadata [[CAP_D_Y:.*]], metadata [[CON_LAM_D:.*]]}
 // CHECK: [[CAP_D_X]] = {{.*}}, metadata [[LAM_D]], {{.*}} [ DW_TAG_member ] [x] [line [[D_LINE]],
 // CHECK: [[CAP_D_Y]] = {{.*}}, metadata [[LAM_D]], {{.*}} [ DW_TAG_member ] [y] [line [[D_LINE]],
 // CHECK: [[CON_LAM_D]] = {{.*}}, metadata [[LAM_D]], {{.*}} [ DW_TAG_subprogram ] [line [[D_LINE]]] [operator()]
-// CHECK: [[DES_LAM_D]] = {{.*}}, metadata [[LAM_D]], {{.*}} [ DW_TAG_subprogram ] [line [[D_LINE]]] [~]
 
 
 // Back to C. -- 55
 // CHECK: [[LAM_C:.*]] = {{.*}}, metadata [[C_FUNC]], {{.*}}, metadata [[LAM_C_ARGS:.*]], i32 0, null, null} ; [ DW_TAG_class_type ] [line [[C_LINE]],
-// CHECK: [[LAM_C_ARGS]] = metadata !{metadata [[CAP_C:.*]], metadata [[CON_LAM_C:.*]], metadata [[DES_LAM_C:.*]]}
+// CHECK: [[LAM_C_ARGS]] = metadata !{metadata [[CAP_C:.*]], metadata [[CON_LAM_C:.*]]}
 // Ignoring the member type for now.
 // CHECK: [[CAP_C]] = {{.*}}, metadata [[LAM_C]], {{.*}}} ; [ DW_TAG_member ] [x] [line [[C_LINE]],
 // CHECK: [[CON_LAM_C]] = {{.*}}, metadata [[LAM_C]], {{.*}} [ DW_TAG_subprogram ] [line [[C_LINE]]] [operator()]
-// CHECK: [[DES_LAM_C]] = {{.*}}, metadata [[LAM_C]], {{.*}} [ DW_TAG_subprogram ] [line [[C_LINE]]] [~]
 
 
 // Back to B. -- 67
 // CHECK: [[LAM_B:.*]] = {{.*}}, metadata [[B_FUNC]], {{.*}}, metadata [[LAM_B_ARGS:.*]], i32 0, null, null} ; [ DW_TAG_class_type ] [line [[B_LINE]],
-// CHECK: [[LAM_B_ARGS]] = metadata !{metadata [[CAP_B:.*]], metadata [[CON_LAM_B:.*]], metadata [[DES_LAM_B:.*]]}
+// CHECK: [[LAM_B_ARGS]] = metadata !{metadata [[CAP_B:.*]], metadata [[CON_LAM_B:.*]]}
 // CHECK: [[CAP_B]] = {{.*}}, metadata [[LAM_B]], {{.*}}} ; [ DW_TAG_member ] [x] [line [[B_LINE]],
 // CHECK: [[CON_LAM_B]] = {{.*}}, metadata [[LAM_B]], {{.*}} [ DW_TAG_subprogram ] [line [[B_LINE]]] [operator()]
-// CHECK: [[DES_LAM_B]] = {{.*}}, metadata [[LAM_B]], {{.*}} [ DW_TAG_subprogram ] [line [[B_LINE]]] [~]
 
 // Back to A. -- 78
 // CHECK: [[LAM_A:.*]] = {{.*}}, metadata [[A_FUNC]], {{.*}}, metadata [[LAM_A_ARGS:.*]], i32 0, null, null} ; [ DW_TAG_class_type ] [line [[A_LINE]],
-// CHECK: [[LAM_A_ARGS]] = metadata !{metadata [[CON_LAM_A:.*]], metadata [[DES_LAM_A:.*]]}
+// CHECK: [[LAM_A_ARGS]] = metadata !{metadata [[CON_LAM_A:.*]]}
 // CHECK: [[CON_LAM_A]] = {{.*}}, metadata [[LAM_A]], {{.*}} [ DW_TAG_subprogram ] [line [[A_LINE]]] [operator()]
-// CHECK: [[DES_LAM_A]] = {{.*}}, metadata [[LAM_A]], {{.*}} [ DW_TAG_subprogram ] [line [[A_LINE]]] [~]
 
 // CVAR:
 // CHECK: {{.*}} metadata [[CVAR_T:![0-9]*]], {{.*}} ; [ DW_TAG_variable ] [cvar] [line [[CVAR_LINE:[0-9]*]]] 
 // CHECK: [[CVAR_T]] = {{.*}}, metadata ![[CVAR_ARGS:.*]], i32 0, null, null} ; [ DW_TAG_class_type ] [line [[CVAR_LINE]],
-// CHECK: [[CVAR_ARGS]] = metadata !{metadata !{{.*}}, metadata !{{.*}}, metadata !{{.*}}}
+// CHECK: [[CVAR_ARGS]] = metadata !{metadata !{{.*}}}
 
 // VAR:
 // CHECK: {{.*}} metadata [[VAR_T:![0-9]*]], {{.*}} ; [ DW_TAG_variable ] [var] [line [[VAR_LINE:[0-9]*]]]
 // CHECK: [[VAR_T]] = {{.*}}, metadata [[VAR_ARGS:![0-9]*]], i32 0, null, null} ; [ DW_TAG_class_type ] [line [[VAR_LINE]],
-// CHECK: [[VAR_ARGS]] = metadata !{metadata !{{.*}}, metadata !{{.*}}, metadata !{{.*}}}
+// CHECK: [[VAR_ARGS]] = metadata !{metadata !{{.*}}}