diff options
| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-05-21 18:31:42 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-05-21 18:31:42 +0000 |
| commit | cd89d4d52443728ecbda9554bd3095324bd29162 (patch) | |
| tree | f6c1a15afb55fec6d4ad6b411bf87e900116ee04 /lib/Transforms | |
| parent | 81f3830f2ed0b26e8bd7ae62e127db427f9f350d (diff) | |
Revert "InstCombine: Turn mul.with.overflow(X, 2) into the cheaper add.with.overflow(X, X)"
It's better to do this in codegen, mul.with.overflow(X, 2) is more canonical because it has only one use on "X".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131798 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCalls.cpp | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp index ea0ffd9c34..243937705a 100644 --- a/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -535,20 +535,6 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { Constant *Struct = ConstantStruct::get(II->getContext(), V, 2, false); return InsertValueInst::Create(Struct, II->getArgOperand(0), 0); } - - // [su]mul.with.overflow(X, 2) -> [su]add.with.overflow(X, X) - if (RHSI->equalsInt(2)) { - Intrinsic::ID Add = - II->getIntrinsicID() == Intrinsic::smul_with_overflow ? - Intrinsic::sadd_with_overflow : Intrinsic::uadd_with_overflow; - - Module *M = II->getParent()->getParent()->getParent(); - const Type *Ty = RHSI->getType(); - Function *F = Intrinsic::getDeclaration(M, Add, &Ty, 1); - - Value *Ops[] = { II->getArgOperand(0), II->getArgOperand(0) }; - return CallInst::Create(F, Ops, Ops+2); - } } break; case Intrinsic::ppc_altivec_lvx: |