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IR: SrcTy == DstTy doesn't imply that a cast is valid

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Cast validity depends on the cast's kind, not just its types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229366 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2015-02-16 09:37:35 +00:00
parent 415561b6e0
commit b7a7566165
2 changed files with 4 additions and 4 deletions
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4
lib/IR/Instructions.cpp
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@ -2864,10 +2864,6 @@ CastInst::castIsValid(Instruction::CastOps op, Value *S, Type *DstTy) {
// Check for type sanity on the arguments
Type *SrcTy = S->getType();
// If this is a cast to the same type then it's trivially true.
if (SrcTy == DstTy)
return true;
if (!SrcTy->isFirstClassType() || !DstTy->isFirstClassType() ||
SrcTy->isAggregateType() || DstTy->isAggregateType())
return false;

4
test/Assembler/invalid_cast4.ll Normal file
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@ -0,0 +1,4 @@
; RUN: not llvm-as < %s 2>&1 | FileCheck %s
; CHECK: invalid cast opcode for cast from 'i64' to 'i64'
global i64* inttoptr (i64 0 to i64)