operand is a signed 32-bit immediate. Unlike with the 8-bit
signed immediate case, it isn't actually smaller to fold a
32-bit signed immediate instead of a load. In fact, it's
larger in the case of 32-bit unsigned immediates, because
they can be materialized with movl instead of movq.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67001
91177308-0d34-0410-b5e6-
96231b3b80d8
// addl 4(%esp), %eax
// The former is 2 bytes shorter. In case where the increment is 1, then
// the saving can be 4 bytes (by using incl %eax).
- ConstantSDNode *Imm = dyn_cast<ConstantSDNode>(U->getOperand(1));
- if (Imm) {
- if (U->getValueType(0) == MVT::i64) {
- if ((int32_t)Imm->getZExtValue() == (int64_t)Imm->getZExtValue())
- return false;
- } else {
- if ((int8_t)Imm->getZExtValue() == (int64_t)Imm->getZExtValue())
- return false;
- }
- }
+ if (ConstantSDNode *Imm = dyn_cast<ConstantSDNode>(U->getOperand(1)))
+ if (Imm->getAPIntValue().isSignedIntN(8))
+ return false;
}
}