[PATCH] D152303: [ExprConstant] fix ICE from Evaluate on _Atomic structs
Nick Desaulniers via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Tue Jun 6 13:15:06 PDT 2023
nickdesaulniers created this revision.
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Fixes two crashes reported by @efriedma and @ahatanak, as per
@ahatanak's analysis.
Link: https://reviews.llvm.org/D151587#4397446
Link: https://reviews.llvm.org/D151587#4399684
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D152303
Files:
clang/lib/AST/ExprConstant.cpp
clang/test/CodeGenCXX/atomicinit.cpp
Index: clang/test/CodeGenCXX/atomicinit.cpp
===================================================================
--- clang/test/CodeGenCXX/atomicinit.cpp
+++ clang/test/CodeGenCXX/atomicinit.cpp
@@ -8,6 +8,10 @@
// CHECK-DAG: @_ZN7PR180978constant1bE ={{.*}} local_unnamed_addr global { i16, i8 } { i16 2, i8 6 }, align 4
// CHECK-DAG: @_ZN7PR180978constant1cE ={{.*}} local_unnamed_addr global { i16, i8 } { i16 3, i8 6 }, align 4
// CHECK-DAG: @_ZN7PR180978constant1yE ={{.*}} local_unnamed_addr global { { i16, i8 }, i32 } { { i16, i8 } { i16 4, i8 6 }, i32 5 }, align 4
+// CHECK-DAG: @_ZN7PR180978constant1zE ={{.*}} global i32 0, align 4
+// CHECK-DAG: @_ZN7PR180978constant2y2E ={{.*}} global %"struct.PR18097::constant::Y" zeroinitializer
+// CHECK-DAG: @_ZN7PR180978constant1gE ={{.*}} global %"struct.PR18097::constant::Struct0" zeroinitializer
+// CHECK-DAG: @_ZN7PR180978constantL1xE = internal {{.*}} constant { i16, i8 } { i16 1, i8 6 }
struct A {
_Atomic(int) i;
@@ -102,5 +106,23 @@
_Atomic(int) b;
};
Y y = { X(4), 5 };
+
+ // CHECK-LABEL: define {{.*}} @__cxx_global_var_init
+ // CHECK: tail call void @llvm.memcpy.p0.p0.i32(ptr{{.*}} @_ZN7PR180978constant2y2E, ptr{{.*}} @_ZN7PR180978constantL1xE, i32 3, i1 false)
+ // CHECK: %0 = load i32, ptr @_ZN7PR180978constant1zE
+ // CHECK: store i32 %0, ptr getelementptr inbounds (%"struct.PR18097::constant::Y", ptr @_ZN7PR180978constant2y2E, i32 0, i32 1)
+ int z;
+ constexpr X x{1};
+ Y y2 = { x, z };
+
+ typedef union {
+ unsigned int f0;
+ } Union0;
+
+ typedef struct {
+ _Atomic(Union0) f1;
+ } Struct0;
+
+ Struct0 g = {};
}
}
Index: clang/lib/AST/ExprConstant.cpp
===================================================================
--- clang/lib/AST/ExprConstant.cpp
+++ clang/lib/AST/ExprConstant.cpp
@@ -15065,6 +15065,7 @@
E, Unqual, ScopeKind::FullExpression, LV);
if (!EvaluateAtomic(E, &LV, Value, Info))
return false;
+ Result = Value;
} else {
if (!EvaluateAtomic(E, nullptr, Result, Info))
return false;
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