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[BasicBlockUtils] Set debug locations for instructions created in SplitBlockPredecessors.

Browse Source 
Test Plan: regression test suite

Reviewers: eugenis, dblaikie

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10343

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239438 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2015-06-09 22:10:29 +00:00
parent 12f81b4639
commit 8478c82b28
3 changed files with 95 additions and 4 deletions
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7
lib/Transforms/Utils/BasicBlockUtils.cpp
View File

@ -486,11 +486,12 @@ BasicBlock *llvm::SplitBlockPredecessors(BasicBlock *BB,
}
// Create new basic block, insert right before the original block.
BasicBlock *NewBB = BasicBlock::Create(BB->getContext(), BB->getName()+Suffix,
BB->getParent(), BB);
BasicBlock *NewBB = BasicBlock::Create(
BB->getContext(), BB->getName() + Suffix, BB->getParent(), BB);
// The new block unconditionally branches to the old block.
BranchInst *BI = BranchInst::Create(BB, NewBB);
BI->setDebugLoc(BB->getFirstNonPHI()->getDebugLoc());
// Move the edges from Preds to point to NewBB instead of BB.
for (unsigned i = 0, e = Preds.size(); i != e; ++i) {
@ -553,6 +554,7 @@ void llvm::SplitLandingPadPredecessors(BasicBlock *OrigBB,
// The new block unconditionally branches to the old block.
BranchInst *BI1 = BranchInst::Create(OrigBB, NewBB1);
BI1->setDebugLoc(OrigBB->getFirstNonPHI()->getDebugLoc());
// Move the edges from Preds to point to NewBB1 instead of OrigBB.
for (unsigned i = 0, e = Preds.size(); i != e; ++i) {
@ -593,6 +595,7 @@ void llvm::SplitLandingPadPredecessors(BasicBlock *OrigBB,
// The new block unconditionally branches to the old block.
BranchInst *BI2 = BranchInst::Create(OrigBB, NewBB2);
BI2->setDebugLoc(OrigBB->getFirstNonPHI()->getDebugLoc());
// Move the remaining edges from OrigBB to point to NewBB2.
for (SmallVectorImpl<BasicBlock*>::iterator

2
lib/Transforms/Utils/LoopSimplify.cpp
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@ -144,8 +144,6 @@ BasicBlock *llvm::InsertPreheaderForLoop(Loop *L, Pass *PP) {
PreheaderBB = SplitBlockPredecessors(Header, OutsideBlocks, ".preheader",
AA, DT, LI, PreserveLCSSA);
PreheaderBB->getTerminator()->setDebugLoc(
Header->getFirstNonPHI()->getDebugLoc());
DEBUG(dbgs() << "LoopSimplify: Creating pre-header "
<< PreheaderBB->getName() << "\n");

90
test/Transforms/LoopSimplify/dbg-loc.ll Normal file
View File

@ -0,0 +1,90 @@
; Check that LoopSimplify creates debug locations in synthesized basic blocks.
; RUN: opt -loop-simplify %s -S -o - | FileCheck %s
%union.anon = type { i32 }
%"Length" = type <{ %union.anon, i8, i8, i8, i8 }>
declare void @bar(%"Length"*) #3
@catchtypeinfo = external unnamed_addr constant { i8*, i8*, i8* }
declare i32 @__gxx_personality_v0(...)
declare void @f1()
declare void @f2()
declare void @f3()
; CHECK-LABEL: @foo
; CHECK: for.body.preheader:
; CHECK-NEXT: br label %for.body, !dbg [[PREHEADER_LOC:![0-9]+]]
; CHECK: for.end.loopexit:
; CHECK-NEXT: br label %for.end, !dbg [[LOOPEXIT_LOC:![0-9]+]]
define linkonce_odr hidden void @foo(%"Length"* %begin, %"Length"* %end) nounwind ssp uwtable align 2 {
entry:
%cmp.4 = icmp eq %"Length"* %begin, %end, !dbg !7
br i1 %cmp.4, label %for.end, label %for.body, !dbg !8
for.body: ; preds = %entry, %length.exit
%begin.sink5 = phi %"Length"* [ %incdec.ptr, %length.exit ], [ %begin, %entry ]
%m_type.i.i.i = getelementptr inbounds %"Length", %"Length"* %begin.sink5, i64 0, i32 2, !dbg !9
%0 = load i8, i8* %m_type.i.i.i, align 1, !dbg !9
%cmp.i.i = icmp eq i8 %0, 9, !dbg !7
br i1 %cmp.i.i, label %if.then.i, label %length.exit, !dbg !8
if.then.i: ; preds = %for.body
tail call void @bar(%"Length"* %begin.sink5) #7, !dbg !10
br label %length.exit, !dbg !10
length.exit: ; preds = %for.body, %if.then.i
%incdec.ptr = getelementptr inbounds %"Length", %"Length"* %begin.sink5, i64 1, !dbg !11
%cmp = icmp eq %"Length"* %incdec.ptr, %end, !dbg !7
br i1 %cmp, label %for.end, label %for.body, !dbg !8
for.end: ; preds = %length.exit, %entry
ret void, !dbg !12
}
; CHECK-LABEL: @with_landingpad
; CHECK: catch.preheader:
; CHECK: br label %catch, !dbg [[LPAD_PREHEADER_LOC:![0-9]+]]
; CHECK: catch.preheader.split-lp:
; CHECK: br label %catch, !dbg [[LPAD_PREHEADER_LOC]]
define void @with_landingpad() uwtable ssp {
entry:
invoke void @f1() to label %try.cont19 unwind label %catch, !dbg !13
catch: ; preds = %if.else, %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
catch i8* bitcast ({ i8*, i8*, i8* }* @catchtypeinfo to i8*), !dbg !13
invoke void @f3() to label %if.else unwind label %eh.resume, !dbg !13
if.else: ; preds = %catch
invoke void @f2() to label %try.cont19 unwind label %catch, !dbg !13
try.cont19: ; preds = %if.else, %entry
ret void, !dbg !13
eh.resume: ; preds = %catch
%1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
cleanup catch i8* bitcast ({ i8*, i8*, i8* }* @catchtypeinfo to i8*), !dbg !13
resume { i8*, i32 } undef, !dbg !13
}
; CHECK-DAG: [[PREHEADER_LOC]] = !DILocation(line: 73, column: 27, scope: !{{[0-9]+}})
; CHECK-DAG: [[LOOPEXIT_LOC]] = !DILocation(line: 75, column: 9, scope: !{{[0-9]+}})
; CHECK-DAG: [[LPAD_PREHEADER_LOC]] = !DILocation(line: 85, column: 1, scope: !{{[0-9]+}})
!llvm.module.flags = !{!0, !1, !2}
!0 = !{i32 2, !"Dwarf Version", i32 4}
!1 = !{i32 2, !"Debug Info Version", i32 3}
!2 = !{i32 1, !"PIC Level", i32 2}
!3 = !{}
!4 = !DISubroutineType(types: !3)
!5 = !DIFile(filename: "Vector.h", directory: "/tmp")
!6 = !DISubprogram(name: "destruct", scope: !5, file: !5, line: 71, type: !4, isLocal: false, isDefinition: true, scopeLine: 72, flags: DIFlagPrototyped, isOptimized: false, function: void (%"Length"*, %"Length"*)* @foo, variables: !3)
!7 = !DILocation(line: 73, column: 38, scope: !6)
!8 = !DILocation(line: 73, column: 13, scope: !6)
!9 = !DILocation(line: 73, column: 27, scope: !6)
!10 = !DILocation(line: 74, column: 17, scope: !6)
!11 = !DILocation(line: 73, column: 46, scope: !6)
!12 = !DILocation(line: 75, column: 9, scope: !6)
!13 = !DILocation(line: 85, column: 1, scope: !6)