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https://github.com/c64scene-ar/llvm-6502.git
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Ignore dbg intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63781 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
parent
4781ad62d1
commit
d0a203d76f
@ -1430,14 +1430,24 @@ static bool FoldBranchToCommonDest(BranchInst *BI) {
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// Only allow this if the condition is a simple instruction that can be
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// executed unconditionally. It must be in the same block as the branch, and
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// must be at the front of the block.
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BasicBlock::iterator FrontIt = BB->front();
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// Ignore dbg intrinsics.
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while(isa<DbgInfoIntrinsic>(FrontIt))
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++FrontIt;
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if ((!isa<CmpInst>(Cond) && !isa<BinaryOperator>(Cond)) ||
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Cond->getParent() != BB || &BB->front() != Cond || !Cond->hasOneUse())
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Cond->getParent() != BB || &*FrontIt != Cond || !Cond->hasOneUse()) {
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return false;
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}
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// Make sure the instruction after the condition is the cond branch.
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BasicBlock::iterator CondIt = Cond; ++CondIt;
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if (&*CondIt != BI)
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// Ingore dbg intrinsics.
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while(isa<DbgInfoIntrinsic>(CondIt))
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++CondIt;
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if (&*CondIt != BI) {
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assert (!isa<DbgInfoIntrinsic>(CondIt) && "Hey do not forget debug info!");
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return false;
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}
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// Cond is known to be a compare or binary operator. Check to make sure that
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// neither operand is a potentially-trapping constant expression.
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@ -1867,6 +1877,9 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
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BasicBlock::iterator BBI = BB->getFirstNonPHI();
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BasicBlock *Succ = BI->getSuccessor(0);
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// Ignore dbg intrinsics.
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while (isa<DbgInfoIntrinsic>(BBI))
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++BBI;
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if (BBI->isTerminator() && // Terminator is the only non-phi instruction!
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Succ != BB) // Don't hurt infinite loops!
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if (TryToSimplifyUncondBranchFromEmptyBlock(BB, Succ))
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@ -1884,15 +1897,24 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
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// This block must be empty, except for the setcond inst, if it exists.
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// Ignore dbg intrinsics.
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BasicBlock::iterator I = BB->begin();
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// Ignore dbg intrinsics.
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while (isa<DbgInfoIntrinsic>(I))
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I++;
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if (&*I == BI ||
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(&*I == cast<Instruction>(BI->getCondition()) &&
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&*++I == BI))
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++I;
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if (&*I == BI) {
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if (FoldValueComparisonIntoPredecessors(BI))
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return SimplifyCFG(BB) | true;
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} else if (&*I == cast<Instruction>(BI->getCondition())){
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++I;
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// Ignore dbg intrinsics.
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while (isa<DbgInfoIntrinsic>(I))
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++I;
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if(&*I == BI) {
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if (FoldValueComparisonIntoPredecessors(BI))
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return SimplifyCFG(BB) | true;
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}
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}
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}
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// If this is a branch on a phi node in the current block, thread control
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// through this block if any PHI node entries are constants.
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if (PHINode *PN = dyn_cast<PHINode>(BI->getCondition()))
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122
test/Transforms/SimplifyCFG/branch_fold_dbg.ll
Normal file
122
test/Transforms/SimplifyCFG/branch_fold_dbg.ll
Normal file
@ -0,0 +1,122 @@
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; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | not grep br
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; END.
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%llvm.dbg.anchor.type = type { i32, i32 }
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%llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* }
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@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata" ;
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@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
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@.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <[6 x i8]*> [#uses=1]
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@.str2 = internal constant [55 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build 00)\00", section "llvm.metadata" ; <[55 x i8]*> [#uses=1]
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@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([6 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([55 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata" ; <%llvm.dbg.compile_unit.type*> [#uses=1]
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declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind
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define void @main() {
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entry:
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.14.i19 = icmp eq i32 0, 2 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.14.i19, label %endif.1.i20, label %read_min.exit
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endif.1.i20: ; preds = %entry
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.9.i.i = icmp eq i8* null, null ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.9.i.i, label %then.i12.i, label %then.i.i
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then.i.i: ; preds = %endif.1.i20
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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then.i12.i: ; preds = %endif.1.i20
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.9.i4.i = icmp eq i8* null, null ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.9.i4.i, label %endif.2.i33, label %then.i5.i
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then.i5.i: ; preds = %then.i12.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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endif.2.i33: ; preds = %then.i12.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %loopexit.0.i40, label %no_exit.0.i35
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no_exit.0.i35: ; preds = %no_exit.0.i35, %endif.2.i33
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.130.i = icmp slt i32 0, 0 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.130.i, label %loopexit.0.i40.loopexit, label %no_exit.0.i35
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loopexit.0.i40.loopexit: ; preds = %no_exit.0.i35
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br label %loopexit.0.i40
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loopexit.0.i40: ; preds = %loopexit.0.i40.loopexit, %endif.2.i33
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.341.i = icmp eq i32 0, 0 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.341.i, label %loopentry.1.i, label %read_min.exit
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loopentry.1.i: ; preds = %loopexit.0.i40
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.347.i = icmp sgt i32 0, 0 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.347.i, label %no_exit.1.i41, label %loopexit.2.i44
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no_exit.1.i41: ; preds = %endif.5.i, %loopentry.1.i
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%indvar.i42 = phi i32 [ %indvar.next.i, %endif.5.i ], [ 0, %loopentry.1.i ] ; <i32> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.355.i = icmp eq i32 0, 3 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.355.i, label %endif.5.i, label %read_min.exit
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endif.5.i: ; preds = %no_exit.1.i41
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.34773.i = icmp sgt i32 0, 0 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%indvar.next.i = add i32 %indvar.i42, 1 ; <i32> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.34773.i, label %no_exit.1.i41, label %loopexit.1.i.loopexit
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loopexit.1.i.loopexit: ; preds = %endif.5.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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loopexit.2.i44: ; preds = %loopentry.1.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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read_min.exit: ; preds = %no_exit.1.i41, %loopexit.0.i40, %entry
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.23 = icmp eq i32 0, 0 ; <i1> [#uses=1]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 %tmp.23, label %endif.1, label %then.1
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then.1: ; preds = %read_min.exit
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %endif.0.i, label %then.0.i
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then.0.i: ; preds = %then.1
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %endif.1.i, label %then.1.i
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endif.0.i: ; preds = %then.1
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %endif.1.i, label %then.1.i
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then.1.i: ; preds = %endif.0.i, %then.0.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %getfree.exit, label %then.2.i
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endif.1.i: ; preds = %endif.0.i, %then.0.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %getfree.exit, label %then.2.i
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then.2.i: ; preds = %endif.1.i, %then.1.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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getfree.exit: ; preds = %endif.1.i, %then.1.i
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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endif.1: ; preds = %read_min.exit
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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%tmp.27.i = getelementptr i32* null, i32 0 ; <i32*> [#uses=0]
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %loopexit.0.i15, label %no_exit.0.i14
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no_exit.0.i14: ; preds = %endif.1
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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loopexit.0.i15: ; preds = %endif.1
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %primal_start_artificial.exit, label %no_exit.1.i16
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no_exit.1.i16: ; preds = %no_exit.1.i16, %loopexit.0.i15
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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br i1 false, label %primal_start_artificial.exit, label %no_exit.1.i16
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primal_start_artificial.exit: ; preds = %no_exit.1.i16, %loopexit.0.i15
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret void
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}
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