Revert "Logging: make os_log buffer size an integer constant expression.

This also reverts a couple of follow-up commits trying to fix the
dependency issues. Latest revision added a cyclic dependency that can't
just be patched up in 5 minutes.

llvm-svn: 345846

4 files changed, 12 insertions, 16 deletions

diff --git a/clang/lib/AST/CMakeLists.txt b/clang/lib/AST/CMakeLists.txt
index d0447bc..4f868a3 100644
--- a/clang/lib/AST/CMakeLists.txt
+++ b/clang/lib/AST/CMakeLists.txt
@@ -72,7 +72,6 @@ add_clang_library(clangAST
   VTTBuilder.cpp
 
   LINK_LIBS
-  clangAnalysis
   clangBasic
   clangLex
   )
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 9fc7b30..bf08d6b 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -33,7 +33,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Analysis/Analyses/OSLog.h"
 #include "clang/AST/APValue.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/ASTDiagnostic.h"
@@ -8127,12 +8126,6 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
     llvm_unreachable("unexpected EvalMode");
   }
 
-  case Builtin::BI__builtin_os_log_format_buffer_size: {
-    analyze_os_log::OSLogBufferLayout Layout;
-    analyze_os_log::computeOSLogBufferLayout(Info.Ctx, E, Layout);
-    return Success(Layout.size().getQuantity(), E);
-  }
-
   case Builtin::BI__builtin_bswap16:
   case Builtin::BI__builtin_bswap32:
   case Builtin::BI__builtin_bswap64: {
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 271dc2a..c67db26 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -3609,6 +3609,13 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
   case Builtin::BI__builtin_os_log_format:
     return emitBuiltinOSLogFormat(*E);
 
+  case Builtin::BI__builtin_os_log_format_buffer_size: {
+    analyze_os_log::OSLogBufferLayout Layout;
+    analyze_os_log::computeOSLogBufferLayout(CGM.getContext(), E, Layout);
+    return RValue::get(ConstantInt::get(ConvertType(E->getType()),
+                                        Layout.size().getQuantity()));
+  }
+
   case Builtin::BI__xray_customevent: {
     if (!ShouldXRayInstrumentFunction())
       return RValue::getIgnored();
diff --git a/clang/test/CodeGen/builtins.c b/clang/test/CodeGen/builtins.c
index 6ca3c41..77b479e 100644
--- a/clang/test/CodeGen/builtins.c
+++ b/clang/test/CodeGen/builtins.c
@@ -729,28 +729,25 @@ void test_builtin_os_log_merge_helper1(void *buf, unsigned u, long long ll) {
 
 // CHECK-LABEL: define void @test_builtin_os_log_errno
 void test_builtin_os_log_errno() {
-  // CHECK-NOT: @stacksave
-  // CHECK: %[[BUF:.*]] = alloca [4 x i8], align 1
-  // CHECK: %[[DECAY:.*]] = getelementptr inbounds [4 x i8], [4 x i8]* %[[BUF]], i32 0, i32 0
-  // CHECK: call void @__os_log_helper_1_2_1_0_96(i8* %[[DECAY]])
-  // CHECK-NOT: @stackrestore
+  // CHECK: %[[VLA:.*]] = alloca i8, i64 4, align 16
+  // CHECK: call void @__os_log_helper_16_2_1_0_96(i8* %[[VLA]])
 
   char buf[__builtin_os_log_format_buffer_size("%m")];
   __builtin_os_log_format(buf, "%m");
 }
 
-// CHECK-LABEL: define linkonce_odr hidden void @__os_log_helper_1_2_1_0_96
+// CHECK-LABEL: define linkonce_odr hidden void @__os_log_helper_16_2_1_0_96
 // CHECK: (i8* %[[BUFFER:.*]])
 
 // CHECK: %[[BUFFER_ADDR:.*]] = alloca i8*, align 8
 // CHECK: store i8* %[[BUFFER]], i8** %[[BUFFER_ADDR]], align 8
 // CHECK: %[[BUF:.*]] = load i8*, i8** %[[BUFFER_ADDR]], align 8
 // CHECK: %[[SUMMARY:.*]] = getelementptr i8, i8* %[[BUF]], i64 0
-// CHECK: store i8 2, i8* %[[SUMMARY]], align 1
+// CHECK: store i8 2, i8* %[[SUMMARY]], align 16
 // CHECK: %[[NUMARGS:.*]] = getelementptr i8, i8* %[[BUF]], i64 1
 // CHECK: store i8 1, i8* %[[NUMARGS]], align 1
 // CHECK: %[[ARGDESCRIPTOR:.*]] = getelementptr i8, i8* %[[BUF]], i64 2
-// CHECK: store i8 96, i8* %[[ARGDESCRIPTOR]], align 1
+// CHECK: store i8 96, i8* %[[ARGDESCRIPTOR]], align 2
 // CHECK: %[[ARGSIZE:.*]] = getelementptr i8, i8* %[[BUF]], i64 3
 // CHECK: store i8 0, i8* %[[ARGSIZE]], align 1
 // CHECK-NEXT: ret void