Add support for DW_TAG_thrown_type.
For Swift we would like to be able to encode the error types that a
function may throw, so the debugger can display them alongside the
function's return value when finish-ing a function.
DWARF defines DW_TAG_thrown_type (intended to be used for C++ throw()
declarations) that is a perfect fit for this purpose. This patch wires
up support for DW_TAG_thrown_type in LLVM by adding a list of thrown
types to DISubprogram.
To offset the cost of the extra pointer, there is a follow-up patch
that turns DISubprogram into a variable-length node.
rdar://problem/29481673
Differential Revision: https://reviews.llvm.org/D32559
llvm-svn: 301489
diff --git a/llvm/test/Assembler/disubprogram.ll b/llvm/test/Assembler/disubprogram.ll
index f6352a5..8a3a60a 100644
--- a/llvm/test/Assembler/disubprogram.ll
+++ b/llvm/test/Assembler/disubprogram.ll
@@ -6,8 +6,8 @@
ret void
}
-; CHECK: !named = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12}
-!named = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12}
+; CHECK: !named = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12, !13, !14}
+!named = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12, !13, !14}
!0 = !{null}
!1 = distinct !DICompositeType(tag: DW_TAG_structure_type)
@@ -61,6 +61,14 @@
unit: !8,
templateParams: !5, declaration: !9, variables: !6)
-!13 = !{i32 1, !"Debug Info Version", i32 3}
-!llvm.module.flags = !{!13}
+!13 = !{!4}
+; CHECK: !13 = !{!4}
+; CHECK: !14 = distinct !DISubprogram(name: "foo", scope: !1, file: !2, line: 1, type: !3, isLocal: true, isDefinition: true, scopeLine: 2, isOptimized: false, unit: !8, thrownTypes: !13)
+!14 = distinct !DISubprogram(name: "foo", scope: !1,
+ file: !2, line: 1, type: !3, isLocal: true,
+ isDefinition: true, scopeLine: 2, isOptimized: false,
+ unit: !8, thrownTypes: !13)
+
+!15 = !{i32 1, !"Debug Info Version", i32 3}
+!llvm.module.flags = !{!15}
!llvm.dbg.cu = !{!8}