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| author | Chandler Carruth <chandlerc@gmail.com> | 2011-12-12 04:36:02 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2011-12-12 04:36:02 +0000 |
| commit | c4eab904c95549106f628b6fdd8ccf62527aa398 (patch) | |
| tree | 28ef32166df30f4204b473bcb9717b327dfe4365 | |
| parent | ccbf1e36d34c2d66600748bdd8767dc122629a58 (diff) | |
| download | llvm-c4eab904c95549106f628b6fdd8ccf62527aa398.tar.gz llvm-c4eab904c95549106f628b6fdd8ccf62527aa398.tar.bz2 llvm-c4eab904c95549106f628b6fdd8ccf62527aa398.tar.xz | |
Teach the verifier to reject all non-constant arguments to the second
argument of the cttz and ctlz intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146360 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/VMCore/Verifier.cpp | 6 | ||||
| -rw-r--r-- | test/Verifier/cttz-undef-arg.ll | 16 |
2 files changed, 22 insertions, 0 deletions
diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp index f74d762be9..003de442d6 100644 --- a/lib/VMCore/Verifier.cpp +++ b/lib/VMCore/Verifier.cpp @@ -1688,6 +1688,12 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) { switch (ID) { default: break; + case Intrinsic::ctlz: // llvm.ctlz + case Intrinsic::cttz: // llvm.cttz + Assert1(isa<ConstantInt>(CI.getArgOperand(1)), + "is_zero_undef argument of bit counting intrinsics must be a " + "constant int", &CI); + break; case Intrinsic::dbg_declare: { // llvm.dbg.declare Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)), "invalid llvm.dbg.declare intrinsic call 1", &CI); diff --git a/test/Verifier/cttz-undef-arg.ll b/test/Verifier/cttz-undef-arg.ll new file mode 100644 index 0000000000..48cd061d32 --- /dev/null +++ b/test/Verifier/cttz-undef-arg.ll @@ -0,0 +1,16 @@ +; RUN: not llvm-as < %s -o /dev/null |& FileCheck %s + +declare i32 @llvm.ctlz.i32(i32, i1) +declare i32 @llvm.cttz.i32(i32, i1) + +define void @f(i32 %x, i1 %is_not_zero) { +entry: +; CHECK: is_zero_undef argument of bit counting intrinsics must be a constant int +; CHECK-NEXT: @llvm.ctlz.i32 + call i32 @llvm.ctlz.i32(i32 %x, i1 %is_not_zero) + +; CHECK: is_zero_undef argument of bit counting intrinsics must be a constant int +; CHECK-NEXT: @llvm.cttz.i32 + call i32 @llvm.cttz.i32(i32 %x, i1 %is_not_zero) + ret void +} |