fix PR6193, only considering sign extensions *from i1* for this
xform.
llvm-svn: 95642
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index f0ddfe3..9de73ba 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -1142,19 +1142,24 @@
Value *C, Value *D) {
// If A is not a select of -1/0, this cannot match.
Value *Cond = 0;
- if (!match(A, m_SExt(m_Value(Cond))))
+ if (!match(A, m_SExt(m_Value(Cond))) ||
+ !Cond->getType()->isInteger(1))
return 0;
// ((cond?-1:0)&C) | (B&(cond?0:-1)) -> cond ? C : B.
- if (match(D, m_Not(m_SExt(m_Specific(Cond)))))
+ if (match(D, m_Not(m_SExt(m_Specific(Cond)))) &&
+ Cond->getType()->isInteger(1))
return SelectInst::Create(Cond, C, B);
- if (match(D, m_SExt(m_Not(m_Specific(Cond)))))
+ if (match(D, m_SExt(m_Not(m_Specific(Cond)))) &&
+ Cond->getType()->isInteger(1))
return SelectInst::Create(Cond, C, B);
// ((cond?-1:0)&C) | ((cond?0:-1)&D) -> cond ? C : D.
- if (match(B, m_Not(m_SExt(m_Specific(Cond)))))
+ if (match(B, m_Not(m_SExt(m_Specific(Cond)))) &&
+ Cond->getType()->isInteger(1))
return SelectInst::Create(Cond, C, D);
- if (match(B, m_SExt(m_Not(m_Specific(Cond)))))
+ if (match(B, m_SExt(m_Not(m_Specific(Cond)))) &&
+ Cond->getType()->isInteger(1))
return SelectInst::Create(Cond, C, D);
return 0;
}