diff options
| -rw-r--r-- | lib/Module/IntrinsicCleaner.cpp | 17 | ||||
| -rw-r--r-- | test/regression/2019-08-01-trap-instruction.ll | 23 |
2 files changed, 32 insertions, 8 deletions
diff --git a/lib/Module/IntrinsicCleaner.cpp b/lib/Module/IntrinsicCleaner.cpp index 19683ab4..92107f4f 100644 --- a/lib/Module/IntrinsicCleaner.cpp +++ b/lib/Module/IntrinsicCleaner.cpp @@ -205,14 +205,15 @@ bool IntrinsicCleanerPass::runOnBasicBlock(BasicBlock &b, Module &M) { Builder.CreateCall(F); Builder.CreateUnreachable(); - ii->eraseFromParent(); - - //check if the instruction after the one we just replaced is not the end of the basic block - //and if it is not (i.e. it is a valid instruction), delete it and all remaining - //because the cleaner just introduced a terminating instruction (unreachable) - //otherwise llvm will assert in Verifier::visitTerminatorInstr - while(i != ie){ // i was already incremented above. - (i++)->eraseFromParent(); + i = ii->eraseFromParent(); + + // check if the instruction after the one we just replaced is not the + // end of the basic block and if it is not (i.e. it is a valid + // instruction), delete it and all remaining because the cleaner just + // introduced a terminating instruction (unreachable) otherwise llvm will + // assert in Verifier::visitTerminatorInstr + while (i != ie) { // i was already incremented above. + i = i->eraseFromParent(); } dirty = true; diff --git a/test/regression/2019-08-01-trap-instruction.ll b/test/regression/2019-08-01-trap-instruction.ll new file mode 100644 index 00000000..2ef57aa2 --- /dev/null +++ b/test/regression/2019-08-01-trap-instruction.ll @@ -0,0 +1,23 @@ +; RUN: rm -rf %t.klee-out +; RUN: llvm-as -f %s -o - | %klee --output-dir=%t.klee-out +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" + +; @foo is not known yet +@foo2 = alias i32 (...), i32 (...)* @foo +@foo = alias i32 (...), bitcast (i32 ()* @__foo to i32 (...)*) + +define i32 @__foo() { +entry: + call void @llvm.trap() noreturn nounwind + ret i32 42 +} + +define i32 @main() { +entry: + call i32 (...) @foo() + call i32 (...) @foo2() + ret i32 0 +} + +declare void @llvm.trap() noreturn nounwind \ No newline at end of file |