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/Transforms/SampleProfile/entry_counts.ll | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'llvm/test/Transforms/SampleProfile/entry_counts.ll') diff --git a/llvm/test/Transforms/SampleProfile/entry_counts.ll b/llvm/test/Transforms/SampleProfile/entry_counts.ll index bfd65c0d651..50cd575295a 100644 --- a/llvm/test/Transforms/SampleProfile/entry_counts.ll +++ b/llvm/test/Transforms/SampleProfile/entry_counts.ll @@ -3,7 +3,7 @@ ; According to the profile, function empty() was called 13,293 times. ; CHECK: {{.*}} = !{!"function_entry_count", i64 13293} -define void @empty() { +define void @empty() !dbg !4 { entry: ret void, !dbg !9 } @@ -16,7 +16,7 @@ entry: !1 = !DIFile(filename: "entry_counts.c", directory: ".") !2 = !{} !3 = !{!4} -!4 = distinct !DISubprogram(name: "empty", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, function: void ()* @empty, variables: !2) +!4 = distinct !DISubprogram(name: "empty", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, variables: !2) !5 = !DISubroutineType(types: !2) !6 = !{i32 2, !"Dwarf Version", i32 4} !7 = !{i32 2, !"Debug Info Version", i32 3} -- cgit v1.2.3