diff options
| -rw-r--r-- | lib/Module/IntrinsicCleaner.cpp | 25 | ||||
| -rw-r--r-- | test/Intrinsics/objectsize.ll | 36 | ||||
| -rw-r--r-- | test/Intrinsics/objectsize.llvm29.ll | 34 | ||||
| -rw-r--r-- | test/lit.cfg | 2 |
4 files changed, 96 insertions, 1 deletions
diff --git a/lib/Module/IntrinsicCleaner.cpp b/lib/Module/IntrinsicCleaner.cpp index da97621a..54ad7db7 100644 --- a/lib/Module/IntrinsicCleaner.cpp +++ b/lib/Module/IntrinsicCleaner.cpp @@ -232,7 +232,30 @@ bool IntrinsicCleanerPass::runOnBasicBlock(BasicBlock &b, Module &M) { dirty = true; break; } - + case Intrinsic::objectsize: { + // We don't know the size of an object in general so we replace + // with 0 or -1 depending on the second argument to the intrinsic. + assert(ii->getNumArgOperands() == 2 && "wrong number of arguments"); + Value *minArg = ii->getArgOperand(1); + assert(minArg && "Failed to get second argument"); + ConstantInt *minArgAsInt = dyn_cast<ConstantInt>(minArg); + assert(minArgAsInt && "Second arg is not a ConstantInt"); + assert(minArgAsInt->getBitWidth() == 1 && "Second argument is not an i1"); + Value *replacement = NULL; + LLVM_TYPE_Q IntegerType *intType = dyn_cast<IntegerType>(ii->getType()); + assert(intType && "intrinsic does not have integer return type"); + if (minArgAsInt->isZero()) { + // min=false + replacement = ConstantInt::get(intType, -1, /*isSigned=*/true); + } else { + // min=true + replacement = ConstantInt::get(intType, 0, /*isSigned=*/false); + } + ii->replaceAllUsesWith(replacement); + ii->eraseFromParent(); + dirty = true; + break; + } default: if (LowerIntrinsics) IL->LowerIntrinsicCall(ii); diff --git a/test/Intrinsics/objectsize.ll b/test/Intrinsics/objectsize.ll new file mode 100644 index 00000000..8b75ce8f --- /dev/null +++ b/test/Intrinsics/objectsize.ll @@ -0,0 +1,36 @@ +; Unfortunately LLVM 2.9 has a different suffix for the ``llvm.objectsize`` instrinsic +; so this LLVM IR fails to verify for that version. +; +; REQUIRES: not-llvm-2.9 +; RUN: %llvmas %s -o=%t.bc +; RUN: rm -rf %t.klee-out +; RUN: %klee -exit-on-error --output-dir=%t.klee-out -disable-opt %t.bc +; ModuleID = 'objectsize.c' +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-S128" +target triple = "x86_64-unknown-linux-gnu" + +define i32 @main() nounwind uwtable { +entry: + %a = alloca i8*, align 8 + %0 = load i8** %a, align 8 + %1 = call i64 @llvm.objectsize.i64.p0i8(i8* %0, i1 true) + %cmp = icmp ne i64 %1, 0 + br i1 %cmp, label %abort.block, label %continue.block + +continue.block: + %2 = load i8** %a, align 8 + %3 = call i64 @llvm.objectsize.i64.p0i8(i8* %2, i1 false) + %cmp1 = icmp ne i64 %3, -1 + br i1 %cmp1, label %abort.block, label %exit.block + +exit.block: + ret i32 0 + +abort.block: + call void @abort() + unreachable +} + +declare i64 @llvm.objectsize.i64.p0i8(i8*, i1) nounwind readnone + +declare void @abort() noreturn nounwind diff --git a/test/Intrinsics/objectsize.llvm29.ll b/test/Intrinsics/objectsize.llvm29.ll new file mode 100644 index 00000000..386eaddb --- /dev/null +++ b/test/Intrinsics/objectsize.llvm29.ll @@ -0,0 +1,34 @@ +; FIXME: Remove this test case when we drop LLVM 2.9 support +; REQUIRES: llvm-2.9 +; RUN: %llvmas %s -o=%t.bc +; RUN: rm -rf %t.klee-out +; RUN: %klee -exit-on-error --output-dir=%t.klee-out -disable-opt %t.bc +; ModuleID = 'objectsize.c' +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-S128" +target triple = "x86_64-unknown-linux-gnu" + +define i32 @main() nounwind { +entry: + %a = alloca i8*, align 8 + %0 = load i8** %a, align 8 + %1 = call i64 @llvm.objectsize.i64(i8* %0, i1 true) + %cmp = icmp ne i64 %1, 0 + br i1 %cmp, label %abort.block, label %continue.block + +continue.block: + %2 = load i8** %a, align 8 + %3 = call i64 @llvm.objectsize.i64(i8* %2, i1 false) + %cmp1 = icmp ne i64 %3, -1 + br i1 %cmp1, label %abort.block, label %exit.block + +exit.block: + ret i32 0 + +abort.block: + call void @abort() + unreachable +} + +declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readnone + +declare void @abort() noreturn nounwind diff --git a/test/lit.cfg b/test/lit.cfg index 06ad17aa..f1253ea6 100644 --- a/test/lit.cfg +++ b/test/lit.cfg @@ -85,6 +85,8 @@ for name in subs: # Add a substitution for lli. config.substitutions.append( ('%lli', os.path.join(llvm_tools_dir, 'lli')) ) +# Add a substitution for llvm-as +config.substitutions.append( ('%llvmas', os.path.join(llvm_tools_dir, 'llvm-as')) ) # Get KLEE and Kleaver specific parameters passed on llvm-lit cmd line # e.g. llvm-lit --param klee_opts=--help |