diff options
| author | Peter Collingbourne <peter@pcc.me.uk> | 2015-11-05 22:03:56 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2015-11-05 22:03:56 +0000 |
| commit | 5f220beefcb655de6aae7c80b456fd4e5cb76ac0 (patch) | |
| tree | d478c6bd28ca4a860f194ccd49ec67aa8f6b062e /test/Linker/2011-08-04-DebugLoc.ll | |
| parent | cc5dc01d7f7b6acdc7160fe30fda00e3b1b48687 (diff) | |
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252219 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Linker/2011-08-04-DebugLoc.ll')
| -rw-r--r-- | test/Linker/2011-08-04-DebugLoc.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/test/Linker/2011-08-04-DebugLoc.ll b/test/Linker/2011-08-04-DebugLoc.ll index cce88ff2d2a..71e89a5072e 100644 --- a/test/Linker/2011-08-04-DebugLoc.ll +++ b/test/Linker/2011-08-04-DebugLoc.ll @@ -9,7 +9,7 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" target triple = "x86_64-apple-macosx10.7.0" -define i32 @foo() nounwind ssp { +define i32 @foo() nounwind ssp !dbg !1 { ret i32 42, !dbg !6 } @@ -18,7 +18,7 @@ define i32 @foo() nounwind ssp { !llvm.dbg.sp = !{!1} !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "Apple clang version 3.0 (tags/Apple/clang-209.11) (based on LLVM 3.0svn)", isOptimized: true, emissionKind: 0, file: !8, enums: !9, retainedTypes: !9, subprograms: !10) -!1 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, file: !8, scope: !2, type: !3, function: i32 ()* @foo) +!1 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, file: !8, scope: !2, type: !3) !2 = !DIFile(filename: "a.c", directory: "/private/tmp") !3 = !DISubroutineType(types: !4) !4 = !{!5} |