diff options
| -rw-r--r-- | lib/Analysis/LazyValueInfo.cpp | 9 | ||||
| -rw-r--r-- | test/Transforms/JumpThreading/lvi-load.ll | 48 |
2 files changed, 53 insertions, 4 deletions
diff --git a/lib/Analysis/LazyValueInfo.cpp b/lib/Analysis/LazyValueInfo.cpp index e4cd867..31ca2de 100644 --- a/lib/Analysis/LazyValueInfo.cpp +++ b/lib/Analysis/LazyValueInfo.cpp @@ -457,10 +457,11 @@ LVILatticeVal LVIQuery::getBlockValue(BasicBlock *BB) { // then we know that the pointer can't be NULL. if (Val->getType()->isPointerTy()) { const PointerType *PTy = cast<PointerType>(Val->getType()); - for (Value::use_iterator UI = Val->use_begin(), UE = Val->use_end(); - UI != UE; ++UI) { - LoadInst *L = dyn_cast<LoadInst>(*UI); - if (L && L->getParent() == BB && L->getPointerAddressSpace() == 0) { + for (BasicBlock::iterator BI = BB->begin(), BE = BB->end();BI != BE;++BI){ + LoadInst *L = dyn_cast<LoadInst>(BI); + if (L && L->getPointerAddressSpace() == 0 && + L->getPointerOperand()->getUnderlyingObject() == + Val->getUnderlyingObject()) { return LVILatticeVal::getNot(ConstantPointerNull::get(PTy)); } } diff --git a/test/Transforms/JumpThreading/lvi-load.ll b/test/Transforms/JumpThreading/lvi-load.ll new file mode 100644 index 0000000..c6af7b5 --- /dev/null +++ b/test/Transforms/JumpThreading/lvi-load.ll @@ -0,0 +1,48 @@ +; RUN: opt -S -jump-threading -enable-jump-threading-lvi < %s | FileCheck %s +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-darwin10.4" + +%"struct.llvm::PATypeHolder" = type { %"struct.llvm::Type"* } +%"struct.llvm::PointerIntPair<llvm::Use**,2u,llvm::Use::PrevPtrTag,llvm::PointerLikeTypeTraits<llvm::Use**> >" = type { i64 } +%"struct.llvm::Type" = type opaque +%"struct.llvm::Use" = type { %"struct.llvm::Value"*, %"struct.llvm::Use"*, %"struct.llvm::PointerIntPair<llvm::Use**,2u,llvm::Use::PrevPtrTag,llvm::PointerLikeTypeTraits<llvm::Use**> >" } +%"struct.llvm::Value" = type { i32 (...)**, i8, i8, i16, %"struct.llvm::PATypeHolder", %"struct.llvm::Use"*, %"struct.llvm::ValueName"* } +%"struct.llvm::ValueName" = type opaque + +@_ZZN4llvm4castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_E8__func__ = internal constant [5 x i8] c"cast\00", align 8 ; <[5 x i8]*> [#uses=1] +@.str = private constant [31 x i8] c"include/llvm/Support/Casting.h\00", align 8 ; <[31 x i8]*> [#uses=1] +@.str1 = private constant [59 x i8] c"isa<X>(Val) && \22cast<Ty>() argument of incompatible type!\22\00", align 8 ; <[59 x i8]*> [#uses=1] + +; CHECK: Z3fooPN4llvm5ValueE +define zeroext i8 @_Z3fooPN4llvm5ValueE(%"struct.llvm::Value"* %V) ssp { +entry: + %0 = getelementptr inbounds %"struct.llvm::Value"* %V, i64 0, i32 1 ; <i8*> [#uses=1] + %1 = load i8* %0, align 8 ; <i8> [#uses=2] + %2 = icmp ugt i8 %1, 20 ; <i1> [#uses=1] + br i1 %2, label %bb.i, label %bb2 + +bb.i: ; preds = %entry + %toBoolnot.i.i = icmp ult i8 %1, 21 ; <i1> [#uses=1] + br i1 %toBoolnot.i.i, label %bb6.i.i, label %_ZN4llvm8dyn_castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit + +bb6.i.i: ; preds = %bb.i + tail call void @__assert_rtn(i8* getelementptr inbounds ([5 x i8]* @_ZZN4llvm4castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_E8__func__, i64 0, i64 0), i8* getelementptr inbounds ([31 x i8]* @.str, i64 0, i64 0), i32 202, i8* getelementptr inbounds ([59 x i8]* @.str1, i64 0, i64 0)) noreturn + unreachable + +_ZN4llvm8dyn_castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit: ; preds = %bb.i +; CHECK-NOT: null + %3 = icmp eq %"struct.llvm::Value"* %V, null ; <i1> [#uses=1] + br i1 %3, label %bb2, label %bb + +bb: ; preds = %_ZN4llvm8dyn_castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit + tail call void @_ZNK4llvm5Value4dumpEv(%"struct.llvm::Value"* %V) +; CHECK: ret + ret i8 1 + +bb2: ; preds = %entry, %_ZN4llvm8dyn_castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit + ret i8 0 +} + +declare void @__assert_rtn(i8*, i8*, i32, i8*) noreturn + +declare void @_ZNK4llvm5Value4dumpEv(%"struct.llvm::Value"*) |