6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-27 14:24:40 +00:00
Code Issues Projects Releases Wiki Activity

This patch implements transform for pattern "( A & (~B)) | (A ^ B) -> (A ^ B)"

Browse Source 
Differential Revision: http://reviews.llvm.org/D4652



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214477 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Suyog Sarda
2014-08-01 04:50:31 +00:00
parent 87569413b0
commit d05b6c6f2c
2 changed files with 30 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
View File

@ -2010,6 +2010,16 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
match(Op1, m_Not(m_Specific(A))))
return BinaryOperator::CreateOr(Builder->CreateNot(A), B);
// (A & (~B)) | (A ^ B) -> (A ^ B)
if (match(Op0, m_And(m_Value(A), m_Not(m_Value(B)))) &&
match(Op1, m_Xor(m_Specific(A), m_Specific(B))))
return BinaryOperator::CreateXor(A, B);
// (A ^ B) | ( A & (~B)) -> (A ^ B)
if (match(Op0, m_Xor(m_Value(A), m_Value(B))) &&
match(Op1, m_And(m_Specific(A), m_Not(m_Specific(B)))))
return BinaryOperator::CreateXor(A, B);
// (A & C)|(B & D)
Value *C = nullptr, *D = nullptr;
if (match(Op0, m_And(m_Value(A), m_Value(C))) &&