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-rw-r--r--clang/lib/CodeGen/CGDebugInfo.cpp39
-rw-r--r--clang/test/CodeGen/debug-info-vla.c4
-rw-r--r--clang/test/CodeGenCXX/debug-info.cpp2
-rw-r--r--clang/test/CodeGenOpenCL/amdgpu-debug-info-variable-expression.cl3
4 files changed, 15 insertions, 33 deletions
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 818b51543d3..2f6a2b95fb6 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -3466,17 +3466,17 @@ void CGDebugInfo::EmitDeclare(const VarDecl *VD, llvm::Value *Storage,
// functions there won't be an implicit param at arg1 and
// otherwise it is 'self' or 'this'.
if (isa<ImplicitParamDecl>(VD) && ArgNo && *ArgNo == 1)
- Flags |= llvm::DINode::FlagObjectPointer;
- if (auto *Arg = dyn_cast<llvm::Argument>(Storage))
- if (Arg->getType()->isPointerTy() && !Arg->hasByValAttr() &&
- !VD->getType()->isPointerType())
- Expr.push_back(llvm::dwarf::DW_OP_deref);
+ Flags |= llvm::DINode::FlagObjectPointer;
+ // Note: Older versions of clang used to emit byval references with an extra
+ // DW_OP_deref, because they referenced the IR arg directly instead of
+ // referencing an alloca. Newer versions of LLVM don't treat allocas
+ // differently from other function arguments when used in a dbg.declare.
auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
-
StringRef Name = VD->getName();
if (!Name.empty()) {
if (VD->hasAttr<BlocksAttr>()) {
+ // Here, we need an offset *into* the alloca.
CharUnits offset = CharUnits::fromQuantity(32);
Expr.push_back(llvm::dwarf::DW_OP_plus);
// offset of __forwarding field
@@ -3488,22 +3488,7 @@ void CGDebugInfo::EmitDeclare(const VarDecl *VD, llvm::Value *Storage,
// offset of x field
offset = CGM.getContext().toCharUnitsFromBits(XOffset);
Expr.push_back(offset.getQuantity());
-
- // Create the descriptor for the variable.
- auto *D = ArgNo
- ? DBuilder.createParameterVariable(Scope, VD->getName(),
- *ArgNo, Unit, Line, Ty)
- : DBuilder.createAutoVariable(Scope, VD->getName(), Unit,
- Line, Ty, Align);
-
- // Insert an llvm.dbg.declare into the current block.
- DBuilder.insertDeclare(
- Storage, D, DBuilder.createExpression(Expr),
- llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
- Builder.GetInsertBlock());
- return;
- } else if (isa<VariableArrayType>(VD->getType()))
- Expr.push_back(llvm::dwarf::DW_OP_deref);
+ }
} else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) {
// If VD is an anonymous union then Storage represents value for
// all union fields.
@@ -3606,8 +3591,7 @@ void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
->getElementOffset(blockInfo.getCapture(VD).getIndex()));
SmallVector<int64_t, 9> addr;
- if (isa<llvm::AllocaInst>(Storage))
- addr.push_back(llvm::dwarf::DW_OP_deref);
+ addr.push_back(llvm::dwarf::DW_OP_deref);
addr.push_back(llvm::dwarf::DW_OP_plus);
addr.push_back(offset.getQuantity());
if (isByRef) {
@@ -3633,12 +3617,11 @@ void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
// Insert an llvm.dbg.declare into the current block.
auto DL =
llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt);
+ auto *Expr = DBuilder.createExpression(addr);
if (InsertPoint)
- DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(addr), DL,
- InsertPoint);
+ DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint);
else
- DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(addr), DL,
- Builder.GetInsertBlock());
+ DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock());
}
void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI,
diff --git a/clang/test/CodeGen/debug-info-vla.c b/clang/test/CodeGen/debug-info-vla.c
index 371d1060228..3b69773207b 100644
--- a/clang/test/CodeGen/debug-info-vla.c
+++ b/clang/test/CodeGen/debug-info-vla.c
@@ -4,8 +4,8 @@ void testVLAwithSize(int s)
{
// CHECK: dbg.declare
// CHECK: dbg.declare({{.*}}, metadata ![[VAR:.*]], metadata ![[EXPR:.*]])
-// CHECK: ![[VAR]] = !DILocalVariable(name: "vla",{{.*}} line: [[@LINE+2]]
-// CHECK: ![[EXPR]] = !DIExpression(DW_OP_deref)
+// CHECK: ![[EXPR]] = !DIExpression()
+// CHECK: ![[VAR]] = !DILocalVariable(name: "vla",{{.*}} line: [[@LINE+1]]
int vla[s];
int i;
for (i = 0; i < s; i++) {
diff --git a/clang/test/CodeGenCXX/debug-info.cpp b/clang/test/CodeGenCXX/debug-info.cpp
index 9575a5129e3..2b86150b52b 100644
--- a/clang/test/CodeGenCXX/debug-info.cpp
+++ b/clang/test/CodeGenCXX/debug-info.cpp
@@ -21,6 +21,7 @@
// CHECK: ![[INCTYPE]] = !DICompositeType(tag: DW_TAG_structure_type, name: "incomplete"
// CHECK-SAME: DIFlagFwdDecl
+// CHECK: ![[EXPR]] = !DIExpression()
template<typename T> struct Identity {
typedef T Type;
@@ -117,7 +118,6 @@ struct foo {
// For some reason function arguments ended up down here
// CHECK: ![[F]] = !DILocalVariable(name: "f", arg: 1, scope: ![[FUNC]]
// CHECK-SAME: type: ![[FOO]]
-// CHECK: ![[EXPR]] = !DIExpression(DW_OP_deref)
foo func(foo f) {
return f; // reference 'f' for now because otherwise we hit another bug
}
diff --git a/clang/test/CodeGenOpenCL/amdgpu-debug-info-variable-expression.cl b/clang/test/CodeGenOpenCL/amdgpu-debug-info-variable-expression.cl
index b02ad46224b..a962d3c75aa 100644
--- a/clang/test/CodeGenOpenCL/amdgpu-debug-info-variable-expression.cl
+++ b/clang/test/CodeGenOpenCL/amdgpu-debug-info-variable-expression.cl
@@ -1,6 +1,5 @@
// RUN: %clang -cl-std=CL2.0 -emit-llvm -g -O0 -S -target amdgcn-amd-amdhsa -mcpu=fiji -o - %s | FileCheck %s
-// CHECK-DAG: ![[NONE:[0-9]+]] = !DIExpression()
// CHECK-DAG: ![[LOCAL:[0-9]+]] = !DIExpression(DW_OP_constu, 2, DW_OP_swap, DW_OP_xderef)
// CHECK-DAG: ![[PRIVATE:[0-9]+]] = !DIExpression(DW_OP_constu, 1, DW_OP_swap, DW_OP_xderef)
@@ -82,7 +81,7 @@ kernel void kernel1(
int *FuncVar4 = Tmp1;
// CHECK-DAG: ![[FUNCVAR5:[0-9]+]] = !DILocalVariable(name: "FuncVar5", scope: !{{[0-9]+}}, file: !{{[0-9]+}}, line: {{[0-9]+}}, type: !{{[0-9]+}})
- // CHECK-DAG: call void @llvm.dbg.declare(metadata i32 addrspace(1)** {{.*}}, metadata ![[FUNCVAR5]], metadata ![[NONE]]), !dbg !{{[0-9]+}}
+ // CHECK-DAG: call void @llvm.dbg.declare(metadata i32 addrspace(1)** {{.*}}, metadata ![[FUNCVAR5]], metadata ![[NONE:[0-9]+]]), !dbg !{{[0-9]+}}
global int *constant FuncVar5 = KernelArg0;
// CHECK-DAG: ![[FUNCVAR6:[0-9]+]] = !DILocalVariable(name: "FuncVar6", scope: !{{[0-9]+}}, file: !{{[0-9]+}}, line: {{[0-9]+}}, type: !{{[0-9]+}})
// CHECK-DAG: call void @llvm.dbg.declare(metadata i32 addrspace(2)** {{.*}}, metadata ![[FUNCVAR6]], metadata ![[NONE]]), !dbg !{{[0-9]+}}
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