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/DebugInfo/Inputs/line.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/DebugInfo/Inputs/line.ll')
| -rw-r--r-- | test/DebugInfo/Inputs/line.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/test/DebugInfo/Inputs/line.ll b/test/DebugInfo/Inputs/line.ll index 156f26217ba..5bdd3b9eb34 100644 --- a/test/DebugInfo/Inputs/line.ll +++ b/test/DebugInfo/Inputs/line.ll @@ -12,7 +12,7 @@ ; CHECK: cmp ; Function Attrs: nounwind uwtable -define i32 @_Z1fii(i32 %a, i32 %b) #0 { +define i32 @_Z1fii(i32 %a, i32 %b) #0 !dbg !4 { entry: %a.addr = alloca i32, align 4 %b.addr = alloca i32, align 4 @@ -43,7 +43,7 @@ attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointe !1 = !DIFile(filename: "line.cpp", directory: "/tmp/dbginfo") !2 = !{} !3 = !{!4} -!4 = distinct !DISubprogram(name: "f", line: 1, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i32, i32)* @_Z1fii, variables: !2) +!4 = distinct !DISubprogram(name: "f", line: 1, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) !5 = !DIFile(filename: "line.cpp", directory: "/tmp/dbginfo") !6 = !DISubroutineType(types: !2) !7 = !{i32 2, !"Dwarf Version", i32 4} |