mirror of
https://github.com/c64scene-ar/llvm-6502.git
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Reapply: Teach SROA how to update debug info for fragmented variables.
This also rolls in the changes discussed in http://reviews.llvm.org/D6766. Defers migrating the debug info for new allocas until after all partitions are created. Thanks to Chandler for reviewing! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225272 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adrian Prantl
parent
d682839830
commit
46cb54c0fb
@ -1240,6 +1240,10 @@ class SROA : public FunctionPass {
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/// currently in the promotable queue.
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SetVector<SelectInst *, SmallVector<SelectInst *, 2>> SpeculatableSelects;
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/// Debug intrinsics do not show up as regular uses in the
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/// IR. This side-table holds the missing use edges.
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DenseMap<AllocaInst *, DbgDeclareInst *> DbgDeclares;
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public:
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SROA(bool RequiresDomTree = true)
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: FunctionPass(ID), RequiresDomTree(RequiresDomTree), C(nullptr),
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@ -1257,8 +1261,8 @@ private:
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friend class AllocaSliceRewriter;
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bool presplitLoadsAndStores(AllocaInst &AI, AllocaSlices &AS);
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bool rewritePartition(AllocaInst &AI, AllocaSlices &AS,
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AllocaSlices::Partition &P);
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AllocaInst *rewritePartition(AllocaInst &AI, AllocaSlices &AS,
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AllocaSlices::Partition &P);
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bool splitAlloca(AllocaInst &AI, AllocaSlices &AS);
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bool runOnAlloca(AllocaInst &AI);
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void clobberUse(Use &U);
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@ -3964,8 +3968,8 @@ bool SROA::presplitLoadsAndStores(AllocaInst &AI, AllocaSlices &AS) {
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/// appropriate new offsets. It also evaluates how successful the rewrite was
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/// at enabling promotion and if it was successful queues the alloca to be
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/// promoted.
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bool SROA::rewritePartition(AllocaInst &AI, AllocaSlices &AS,
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AllocaSlices::Partition &P) {
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AllocaInst *SROA::rewritePartition(AllocaInst &AI, AllocaSlices &AS,
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AllocaSlices::Partition &P) {
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// Try to compute a friendly type for this partition of the alloca. This
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// won't always succeed, in which case we fall back to a legal integer type
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// or an i8 array of an appropriate size.
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@ -4003,6 +4007,7 @@ bool SROA::rewritePartition(AllocaInst &AI, AllocaSlices &AS,
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NewAI = &AI;
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// FIXME: We should be able to bail at this point with "nothing changed".
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// FIXME: We might want to defer PHI speculation until after here.
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// FIXME: return nullptr;
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} else {
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unsigned Alignment = AI.getAlignment();
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if (!Alignment) {
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@ -4098,7 +4103,7 @@ bool SROA::rewritePartition(AllocaInst &AI, AllocaSlices &AS,
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PostPromotionWorklist.pop_back();
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}
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return true;
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return NewAI;
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}
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/// \brief Walks the slices of an alloca and form partitions based on them,
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@ -4137,9 +4142,24 @@ bool SROA::splitAlloca(AllocaInst &AI, AllocaSlices &AS) {
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if (!IsSorted)
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std::sort(AS.begin(), AS.end());
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/// \brief Describes the allocas introduced by rewritePartition
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/// in order to migrate the debug info.
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struct Piece {
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AllocaInst *Alloca;
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uint64_t Offset;
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uint64_t Size;
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Piece(AllocaInst *AI, uint64_t O, uint64_t S)
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: Alloca(AI), Offset(O), Size(S) {}
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};
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SmallVector<Piece, 4> Pieces;
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// Rewrite each partition.
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for (auto &P : AS.partitions()) {
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Changed |= rewritePartition(AI, AS, P);
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if (AllocaInst *NewAI = rewritePartition(AI, AS, P)) {
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Changed = true;
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if (NewAI != &AI)
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Pieces.push_back(Piece(NewAI, P.beginOffset(), P.size()));
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}
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++NumPartitions;
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}
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@ -4147,6 +4167,28 @@ bool SROA::splitAlloca(AllocaInst &AI, AllocaSlices &AS) {
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MaxPartitionsPerAlloca =
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std::max<unsigned>(NumPartitions, MaxPartitionsPerAlloca);
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// Migrate debug information from the old alloca to the new alloca(s)
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// and the individial partitions.
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if (DbgDeclareInst *DbgDecl = DbgDeclares.lookup(&AI)) {
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DIVariable Var(DbgDecl->getVariable());
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DIExpression Expr(DbgDecl->getExpression());
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DIBuilder DIB(*AI.getParent()->getParent()->getParent(),
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/*AllowUnresolved*/ false);
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bool IsSplit = Pieces.size() > 1;
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for (auto Piece : Pieces) {
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// Create a piece expression describing the new partition or reuse AI's
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// expression if there is only one partition.
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if (IsSplit)
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Expr = DIB.createPieceExpression(Piece.Offset, Piece.Size);
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Instruction *NewDDI = DIB.insertDeclare(Piece.Alloca, Var, Expr, &AI);
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NewDDI->setDebugLoc(DbgDecl->getDebugLoc());
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assert((!DbgDeclares.count(Piece.Alloca) ||
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DbgDeclares[Piece.Alloca] == cast<DbgDeclareInst>(NewDDI)
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) && "alloca already described");
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DbgDeclares.insert(std::make_pair(Piece.Alloca,
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cast<DbgDeclareInst>(NewDDI)));
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}
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}
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return Changed;
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}
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@ -4258,8 +4300,13 @@ void SROA::deleteDeadInstructions(
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DeadInsts.insert(U);
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}
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if (AllocaInst *AI = dyn_cast<AllocaInst>(I))
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if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) {
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DeletedAllocas.insert(AI);
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if (DbgDeclareInst *DbgDecl = DbgDeclares.lookup(AI)) {
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DbgDecl->eraseFromParent();
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DbgDeclares.erase(AI);
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}
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}
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++NumDeleted;
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I->eraseFromParent();
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@ -4374,11 +4421,16 @@ bool SROA::runOnFunction(Function &F) {
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DT = DTWP ? &DTWP->getDomTree() : nullptr;
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AC = &getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F);
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DbgDeclares.clear();
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BasicBlock &EntryBB = F.getEntryBlock();
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for (BasicBlock::iterator I = EntryBB.begin(), E = std::prev(EntryBB.end());
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I != E; ++I)
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I != E; ++I) {
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if (AllocaInst *AI = dyn_cast<AllocaInst>(I))
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Worklist.insert(AI);
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else if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(I))
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if (auto AI = dyn_cast_or_null<AllocaInst>(DDI->getAddress()))
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DbgDeclares.insert(std::make_pair(AI, DDI));
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}
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bool Changed = false;
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// A set of deleted alloca instruction pointers which should be removed from
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@ -13,12 +13,12 @@
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; }
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;
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; RUN: opt %s -O2 -S -o - | FileCheck %s
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; Test that we do not lower dbg.declares for arrays.
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; Test that we correctly lower dbg.declares for arrays.
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;
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; CHECK: define i32 @main
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; CHECK: call void @llvm.dbg.value
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; CHECK: call void @llvm.dbg.value
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; CHECK: call void @llvm.dbg.declare
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; CHECK: call void @llvm.dbg.value(metadata i32 42, i64 0, metadata ![[ARRAY:[0-9]+]], metadata ![[EXPR:[0-9]+]])
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; CHECK: ![[ARRAY]] = {{.*}}; [ DW_TAG_auto_variable ] [array] [line 6]
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; CHECK: ![[EXPR]] = {{.*}}; [ DW_TAG_expression ] [DW_OP_piece offset=0, size=4]
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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97
test/DebugInfo/X86/sroasplit-1.ll
Normal file
97
test/DebugInfo/X86/sroasplit-1.ll
Normal file
@ -0,0 +1,97 @@
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; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
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;
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; Test that we can partial emit debug info for aggregates repeatedly
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; split up by SROA.
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;
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; // Compile with -O1
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; typedef struct {
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; int a;
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; long int b;
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; } Inner;
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;
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; typedef struct {
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; Inner inner[2];
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; } Outer;
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;
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; int foo(Outer outer) {
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; Inner i1 = outer.inner[1];
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; return i1.a;
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; }
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;
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; Verify that SROA creates a variable piece when splitting i1.
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; CHECK: %[[I1:.*]] = alloca [12 x i8], align 4
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; CHECK: call void @llvm.dbg.declare(metadata [12 x i8]* %[[I1]], metadata ![[VAR:[0-9]+]], metadata ![[PIECE1:[0-9]+]])
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; CHECK: call void @llvm.dbg.value(metadata i32 %[[A:.*]], i64 0, metadata ![[VAR]], metadata ![[PIECE2:[0-9]+]])
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; CHECK: ret i32 %[[A]]
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; Read Var and Piece:
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; CHECK: ![[VAR]] = {{.*}} ; [ DW_TAG_auto_variable ] [i1] [line 11]
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; CHECK: ![[PIECE1]] = {{.*}} ; [ DW_TAG_expression ] [DW_OP_piece offset=4, size=12]
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; CHECK: ![[PIECE2]] = {{.*}} ; [ DW_TAG_expression ] [DW_OP_piece offset=0, size=4]
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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%struct.Outer = type { [2 x %struct.Inner] }
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%struct.Inner = type { i32, i64 }
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; Function Attrs: nounwind ssp uwtable
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define i32 @foo(%struct.Outer* byval align 8 %outer) #0 {
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entry:
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%i1 = alloca %struct.Inner, align 8
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call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata !25, metadata !2), !dbg !26
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call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata !27, metadata !2), !dbg !28
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%inner = getelementptr inbounds %struct.Outer* %outer, i32 0, i32 0, !dbg !28
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%arrayidx = getelementptr inbounds [2 x %struct.Inner]* %inner, i32 0, i64 1, !dbg !28
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%0 = bitcast %struct.Inner* %i1 to i8*, !dbg !28
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%1 = bitcast %struct.Inner* %arrayidx to i8*, !dbg !28
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 16, i32 8, i1 false), !dbg !28
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%a = getelementptr inbounds %struct.Inner* %i1, i32 0, i32 0, !dbg !29
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%2 = load i32* %a, align 4, !dbg !29
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ret i32 %2, !dbg !29
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!22, !23}
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!llvm.ident = !{!24}
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!0 = !{!"0x11\0012\00clang version 3.5.0 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [ DW_TAG_compile_unit ] [sroasplit-1.c] [DW_LANG_C99]
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!1 = !{!"sroasplit-1.c", !""}
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!2 = !{}
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!3 = !{!4}
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!4 = !{!"0x2e\00foo\00foo\00\0010\000\001\000\006\00256\000\0010", !1, !5, !6, null, i32 (%struct.Outer*)* @foo, null, null, !2} ; [ DW_TAG_subprogram ] [ DW_TAG_subprogram ] [line 10] [def] [foo]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [ DW_TAG_file_type ] [sroasplit-1.c]
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!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = !{!8, !9}
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!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!9 = !{!"0x16\00Outer\008\000\000\000\000", !1, null, !10} ; [ DW_TAG_typedef ] [ DW_TAG_typedef ] [Outer] [line 8, size 0, align 0, offset 0] [from ]
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!10 = !{!"0x13\00\006\00256\0064\000\000\000", !1, null, null, !11, null, null, null} ; [ DW_TAG_structure_type ] [line 6, size 256, align 64, offset 0] [def] [from ]
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!11 = !{!12}
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!12 = !{!"0xd\00inner\007\00256\0064\000\000", !1, !10, !13} ; [ DW_TAG_member ] [inner] [line 7, size 256, align 64, offset 0] [from ]
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!13 = !{!"0x1\00\000\00256\0064\000\000", null, null, !14, !20, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 256, align 64, offset 0] [from Inner]
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!14 = !{!"0x16\00Inner\004\000\000\000\000", !1, null, !15} ; [ DW_TAG_typedef ] [ DW_TAG_typedef ] [Inner] [line 4, size 0, align 0, offset 0] [from ]
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!15 = !{!"0x13\00\001\00128\0064\000\000\000", !1, null, null, !16, null, null, null} ; [ DW_TAG_structure_type ] [line 1, size 128, align 64, offset 0] [def] [from ]
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!16 = !{!17, !18}
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!17 = !{!"0xd\00a\002\0032\0032\000\000", !1, !15, !8} ; [ DW_TAG_member ] [a] [line 2, size 32, align 32, offset 0] [from int]
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!18 = !{!"0xd\00b\003\0064\0064\0064\000", !1, !15, !19} ; [ DW_TAG_member ] [b] [line 3, size 64, align 64, offset 64] [from long int]
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!19 = !{!"0x24\00long int\000\0064\0064\000\000\005", null, null} ; [ DW_TAG_base_type ] [ DW_TAG_base_type ] [long int] [line 0, size 64, align 64, offset 0, enc DW_ATE_signed]
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!20 = !{!21}
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!21 = !{!"0x21\000\002"} ; [ DW_TAG_subrange_type ] [0, 1]
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!22 = !{i32 2, !"Dwarf Version", i32 2}
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!23 = !{i32 1, !"Debug Info Version", i32 2}
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!24 = !{!"clang version 3.5.0 "}
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!25 = !{!"0x101\00outer\0016777226\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [ DW_TAG_arg_variable ] [outer] [line 10]
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!26 = !{i32 10, i32 0, !4, null}
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!27 = !{!"0x100\00i1\0011\000", !4, !5, !14} ; [ DW_TAG_auto_variable ] [ DW_TAG_auto_variable ] [i1] [line 11]
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!28 = !{i32 11, i32 0, !4, null}
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!29 = !{i32 12, i32 0, !4, null}
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102
test/DebugInfo/X86/sroasplit-2.ll
Normal file
102
test/DebugInfo/X86/sroasplit-2.ll
Normal file
@ -0,0 +1,102 @@
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; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
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;
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; Test that we can partial emit debug info for aggregates repeatedly
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; split up by SROA.
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;
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; // Compile with -O1
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; typedef struct {
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; int a;
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; int b;
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; } Inner;
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;
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; typedef struct {
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; Inner inner[2];
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; } Outer;
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;
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; int foo(Outer outer) {
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; Inner i1 = outer.inner[1];
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; return i1.a;
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; }
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;
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; Verify that SROA creates a variable piece when splitting i1.
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; CHECK: call void @llvm.dbg.value(metadata i64 %outer.coerce0, i64 0, metadata ![[O:[0-9]+]], metadata ![[PIECE1:[0-9]+]]),
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; CHECK: call void @llvm.dbg.value(metadata i64 %outer.coerce1, i64 0, metadata ![[O]], metadata ![[PIECE2:[0-9]+]]),
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; CHECK: call void @llvm.dbg.value({{.*}}, i64 0, metadata ![[I1:[0-9]+]], metadata ![[PIECE3:[0-9]+]]),
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; CHECK-DAG: ![[O]] = {{.*}} [ DW_TAG_arg_variable ] [outer] [line 10]
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; CHECK-DAG: ![[PIECE1]] = {{.*}} [ DW_TAG_expression ] [DW_OP_piece offset=0, size=8]
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; CHECK-DAG: ![[PIECE2]] = {{.*}} [ DW_TAG_expression ] [DW_OP_piece offset=8, size=8]
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; CHECK-DAG: ![[I1]] = {{.*}} [ DW_TAG_auto_variable ] [i1] [line 11]
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; CHECK-DAG: ![[PIECE3]] = {{.*}} [ DW_TAG_expression ] [DW_OP_piece offset=0, size=4]
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; ModuleID = 'sroasplit-2.c'
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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%struct.Outer = type { [2 x %struct.Inner] }
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%struct.Inner = type { i32, i32 }
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; Function Attrs: nounwind ssp uwtable
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define i32 @foo(i64 %outer.coerce0, i64 %outer.coerce1) #0 {
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%outer = alloca %struct.Outer, align 8
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%i1 = alloca %struct.Inner, align 4
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%1 = bitcast %struct.Outer* %outer to { i64, i64 }*
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%2 = getelementptr { i64, i64 }* %1, i32 0, i32 0
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store i64 %outer.coerce0, i64* %2
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%3 = getelementptr { i64, i64 }* %1, i32 0, i32 1
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store i64 %outer.coerce1, i64* %3
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call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata !24, metadata !2), !dbg !25
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call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata !26, metadata !2), !dbg !27
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%4 = getelementptr inbounds %struct.Outer* %outer, i32 0, i32 0, !dbg !27
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%5 = getelementptr inbounds [2 x %struct.Inner]* %4, i32 0, i64 1, !dbg !27
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%6 = bitcast %struct.Inner* %i1 to i8*, !dbg !27
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%7 = bitcast %struct.Inner* %5 to i8*, !dbg !27
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %6, i8* %7, i64 8, i32 4, i1 false), !dbg !27
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%8 = getelementptr inbounds %struct.Inner* %i1, i32 0, i32 0, !dbg !28
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%9 = load i32* %8, align 4, !dbg !28
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ret i32 %9, !dbg !28
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind
|
||||
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2
|
||||
|
||||
attributes #0 = { nounwind ssp uwtable "no-frame-pointer-elim"="true" }
|
||||
attributes #1 = { nounwind readnone }
|
||||
attributes #2 = { nounwind }
|
||||
|
||||
!llvm.dbg.cu = !{!0}
|
||||
!llvm.module.flags = !{!21, !22}
|
||||
!llvm.ident = !{!23}
|
||||
|
||||
!0 = !{!"0x11\0012\00clang version 3.5.0 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [ DW_TAG_compile_unit ] [sroasplit-2.c] [DW_LANG_C99]
|
||||
!1 = !{!"sroasplit-2.c", !""}
|
||||
!2 = !{}
|
||||
!3 = !{!4}
|
||||
!4 = !{!"0x2e\00foo\00foo\00\0010\000\001\000\006\00256\000\0010", !1, !5, !6, null, i32 (i64, i64)* @foo, null, null, !2} ; [ DW_TAG_subprogram ] [ DW_TAG_subprogram ] [line 10] [def] [foo]
|
||||
!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [ DW_TAG_file_type ] [sroasplit-2.c]
|
||||
!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
|
||||
!7 = !{!8, !9}
|
||||
!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
|
||||
!9 = !{!"0x16\00Outer\008\000\000\000\000", !1, null, !10} ; [ DW_TAG_typedef ] [ DW_TAG_typedef ] [Outer] [line 8, size 0, align 0, offset 0] [from ]
|
||||
!10 = !{!"0x13\00\006\00128\0032\000\000\000", !1, null, null, !11, null, null, null} ; [ DW_TAG_structure_type ] [line 6, size 128, align 32, offset 0] [def] [from ]
|
||||
!11 = !{!12}
|
||||
!12 = !{!"0xd\00inner\007\00128\0032\000\000", !1, !10, !13} ; [ DW_TAG_member ] [inner] [line 7, size 128, align 32, offset 0] [from ]
|
||||
!13 = !{!"0x1\00\000\00128\0032\000\000", null, null, !14, !19, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 128, align 32, offset 0] [from Inner]
|
||||
!14 = !{!"0x16\00Inner\004\000\000\000\000", !1, null, !15} ; [ DW_TAG_typedef ] [ DW_TAG_typedef ] [Inner] [line 4, size 0, align 0, offset 0] [from ]
|
||||
!15 = !{!"0x13\00\001\0064\0032\000\000\000", !1, null, null, !16, null, null, null} ; [ DW_TAG_structure_type ] [line 1, size 64, align 32, offset 0] [def] [from ]
|
||||
!16 = !{!17, !18}
|
||||
!17 = !{!"0xd\00a\002\0032\0032\000\000", !1, !15, !8} ; [ DW_TAG_member ] [a] [line 2, size 32, align 32, offset 0] [from int]
|
||||
!18 = !{!"0xd\00b\003\0032\0032\0032\000", !1, !15, !8} ; [ DW_TAG_member ] [b] [line 3, size 32, align 32, offset 32] [from int]
|
||||
!19 = !{!20}
|
||||
!20 = !{!"0x21\000\002"} ; [ DW_TAG_subrange_type ] [0, 1]
|
||||
!21 = !{i32 2, !"Dwarf Version", i32 2}
|
||||
!22 = !{i32 1, !"Debug Info Version", i32 2}
|
||||
!23 = !{!"clang version 3.5.0 "}
|
||||
!24 = !{!"0x101\00outer\0016777226\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [ DW_TAG_arg_variable ] [outer] [line 10]
|
||||
!25 = !{i32 10, i32 0, !4, null}
|
||||
!26 = !{!"0x100\00i1\0011\000", !4, !5, !14} ; [ DW_TAG_auto_variable ] [ DW_TAG_auto_variable ] [i1] [line 11]
|
||||
!27 = !{i32 11, i32 0, !4, null}
|
||||
!28 = !{i32 12, i32 0, !4, null}
|
||||
63
test/DebugInfo/X86/sroasplit-3.ll
Normal file
63
test/DebugInfo/X86/sroasplit-3.ll
Normal file
@ -0,0 +1,63 @@
|
||||
; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
|
||||
; ModuleID = 'test.c'
|
||||
; Test that SROA updates the debug info correctly if an alloca was rewritten but
|
||||
; not partitioned into multiple allocas.
|
||||
;
|
||||
; CHECK: call void @llvm.dbg.value(metadata float %s.coerce, i64 0, metadata ![[VAR:[0-9]+]], metadata ![[EXPR:[0-9]+]])
|
||||
; CHECK: ![[VAR]] = {{.*}} [ DW_TAG_arg_variable ] [s] [line 3]
|
||||
; CHECK: ![[EXPR]] = {{.*}} [ DW_TAG_expression ]
|
||||
; CHECK-NOT: DW_OP_piece
|
||||
|
||||
;
|
||||
; struct S { float f; };
|
||||
;
|
||||
; float foo(struct S s) {
|
||||
; return s.f;
|
||||
; }
|
||||
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
||||
target triple = "x86_64-apple-macosx10.10.0"
|
||||
|
||||
%struct.S = type { float }
|
||||
|
||||
; Function Attrs: nounwind ssp uwtable
|
||||
define float @foo(float %s.coerce) #0 {
|
||||
entry:
|
||||
%s = alloca %struct.S, align 4
|
||||
%coerce.dive = getelementptr %struct.S* %s, i32 0, i32 0
|
||||
store float %s.coerce, float* %coerce.dive, align 1
|
||||
call void @llvm.dbg.declare(metadata %struct.S* %s, metadata !16, metadata !17), !dbg !18
|
||||
%f = getelementptr inbounds %struct.S* %s, i32 0, i32 0, !dbg !19
|
||||
%0 = load float* %f, align 4, !dbg !19
|
||||
ret float %0, !dbg !19
|
||||
}
|
||||
|
||||
; Function Attrs: nounwind readnone
|
||||
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
||||
|
||||
attributes #0 = { nounwind ssp uwtable }
|
||||
attributes #1 = { nounwind readnone }
|
||||
|
||||
!llvm.dbg.cu = !{!0}
|
||||
!llvm.module.flags = !{!12, !13, !14}
|
||||
!llvm.ident = !{!15}
|
||||
|
||||
!0 = !{!"0x11\0012\00clang version 3.6.0 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/Volumes/Data/llvm/_build.ninja.debug/test.c] [DW_LANG_C99]
|
||||
!1 = !{!"test.c", !"/Volumes/Data/llvm/_build.ninja.debug"}
|
||||
!2 = !{}
|
||||
!3 = !{!4}
|
||||
!4 = !{!"0x2e\00foo\00foo\00\003\000\001\000\000\00256\000\003", !1, !5, !6, null, float (float)* @foo, null, null, !2} ; [ DW_TAG_subprogram ] [line 3] [def] [foo]
|
||||
!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/Volumes/Data/llvm/_build.ninja.debug/test.c]
|
||||
!6 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
|
||||
!7 = !{!8, !9}
|
||||
!8 = !{!"0x24\00float\000\0032\0032\000\000\004", null, null} ; [ DW_TAG_base_type ] [float] [line 0, size 32, align 32, offset 0, enc DW_ATE_float]
|
||||
!9 = !{!"0x13\00S\001\0032\0032\000\000\000", !1, null, null, !10, null, null, null} ; [ DW_TAG_structure_type ] [S] [line 1, size 32, align 32, offset 0] [def] [from ]
|
||||
!10 = !{!11}
|
||||
!11 = !{!"0xd\00f\001\0032\0032\000\000", !1, !9, !8} ; [ DW_TAG_member ] [f] [line 1, size 32, align 32, offset 0] [from float]
|
||||
!12 = !{i32 2, !"Dwarf Version", i32 2}
|
||||
!13 = !{i32 2, !"Debug Info Version", i32 2}
|
||||
!14 = !{i32 1, !"PIC Level", i32 2}
|
||||
!15 = !{!"clang version 3.6.0 "}
|
||||
!16 = !{!"0x101\00s\0016777219\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [s] [line 3]
|
||||
!17 = !{!"0x102"} ; [ DW_TAG_expression ]
|
||||
!18 = !{i32 3, i32 20, !4, null}
|
||||
!19 = !{i32 4, i32 2, !4, null}
|
||||
Loading…
Reference in New Issue
Block a user