[PATCH] D111037: [X86] Check if struct is blank before getting the inner types

[Pengfei Wang via Phabricator via cfe-commits]

pengfei updated this revision to Diff 378102.
pengfei added a comment.

Use named struct to check CPP as well.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111037/new/

https://reviews.llvm.org/D111037

Files:
  clang/lib/CodeGen/TargetInfo.cpp
  clang/test/CodeGen/X86/avx512fp16-abi.c


Index: clang/test/CodeGen/X86/avx512fp16-abi.c
===================================================================
--- clang/test/CodeGen/X86/avx512fp16-abi.c
+++ clang/test/CodeGen/X86/avx512fp16-abi.c
@@ -197,3 +197,44 @@
   // CHECK-CPP: define{{.*}} @_Z3fs26shalf2(double {{.*}}
   return s.a;
 };
+
+struct fsd {
+  float a;
+  struct {};
+  double b;
+};
+
+struct fsd pr52011() {
+  // CHECK: define{{.*}} { float, double } @
+}
+
+struct hsd {
+  _Float16 a;
+  struct {};
+  double b;
+};
+
+struct hsd pr52011_2() {
+  // CHECK: define{{.*}} { half, double } @
+}
+
+struct hsf {
+  _Float16 a;
+  struct {};
+  float b;
+};
+
+struct hsf pr52011_3() {
+  // CHECK: define{{.*}} <4 x half> @
+}
+
+struct fds {
+  float a;
+  double b;
+  struct {};
+};
+
+struct fds pr52011_4() {
+  // CHECK-C: define{{.*}} { float, double } @pr52011_4
+  // CHECK-CPP: define{{.*}} void @_Z9pr52011_4v({{.*}} sret
+}
Index: clang/lib/CodeGen/TargetInfo.cpp
===================================================================
--- clang/lib/CodeGen/TargetInfo.cpp
+++ clang/lib/CodeGen/TargetInfo.cpp
@@ -3415,6 +3415,9 @@
 
   // If this is a struct, recurse into the field at the specified offset.
   if (llvm::StructType *STy = dyn_cast<llvm::StructType>(IRType)) {
+    if (!STy->getNumContainedTypes())
+      return nullptr;
+
     const llvm::StructLayout *SL = TD.getStructLayout(STy);
     unsigned Elt = SL->getElementContainingOffset(IROffset);
     IROffset -= SL->getElementOffset(Elt);


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