From d4bff30370db9f2cb13838897012768739cf1ee0 Mon Sep 17 00:00:00 2001 From: Peter Collingbourne Date: Thu, 5 Nov 2015 22:03:56 +0000 Subject: DI: Reverse direction of subprogram -> function edge. Previously, subprograms contained a metadata reference to the function they described. Because most clients need to get or set a subprogram for a given function rather than the other way around, this created unneeded inefficiency. For example, many passes needed to call the function llvm::makeSubprogramMap() to build a mapping from functions to subprograms, and the IR linker needed to fix up function references in a way that caused quadratic complexity in the IR linking phase of LTO. This change reverses the direction of the edge by storing the subprogram as function-level metadata and removing DISubprogram's function field. Since this is an IR change, a bitcode upgrade has been provided. Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is attached to the PR. Differential Revision: http://reviews.llvm.org/D14265 llvm-svn: 252219 --- llvm/test/DebugInfo/Generic/inline-no-debug-info.ll | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'llvm/test/DebugInfo/Generic/inline-no-debug-info.ll') diff --git a/llvm/test/DebugInfo/Generic/inline-no-debug-info.ll b/llvm/test/DebugInfo/Generic/inline-no-debug-info.ll index a46146761a2..443ba9da6b5 100644 --- a/llvm/test/DebugInfo/Generic/inline-no-debug-info.ll +++ b/llvm/test/DebugInfo/Generic/inline-no-debug-info.ll @@ -43,7 +43,7 @@ entry: } ; Function Attrs: nounwind uwtable -define void @caller() #0 { +define void @caller() #0 !dbg !4 { entry: tail call void @callee(), !dbg !12 ret void, !dbg !12 @@ -59,7 +59,7 @@ attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointe !1 = !DIFile(filename: "test.c", directory: "/code/llvm/build0") !2 = !{} !3 = !{!4, !7} -!4 = distinct !DISubprogram(name: "caller", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, function: void ()* @caller, variables: !2) +!4 = distinct !DISubprogram(name: "caller", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, variables: !2) !5 = !DIFile(filename: "test.c", directory: "/code/llvm/build0") !6 = !DISubroutineType(types: !2) !7 = distinct !DISubprogram(name: "callee2", line: 2, isLocal: true, isDefinition: true, virtualIndex: 6, isOptimized: true, scopeLine: 2, file: !1, scope: !5, type: !6, variables: !2) -- cgit v1.2.3