}
}
+ {
+ Value *X;
+ const APInt *Y, *C;
+ if (match(CmpLHS, m_And(m_Value(X), m_Power2(Y))) &&
+ match(CmpRHS, m_Zero())) {
+ Value *V = nullptr;
+ // (X & Y) == 0 ? X : X ^ Y --> X & ~Y
+ if (Pred == ICmpInst::ICMP_EQ && TrueVal == X &&
+ match(FalseVal, m_Xor(m_Specific(X), m_APInt(C))) && *Y == *C)
+ V = Builder->CreateAnd(X, ~(*Y));
+ // (X & Y) != 0 ? X ^ Y : X --> X & ~Y
+ else if (Pred == ICmpInst::ICMP_NE && FalseVal == X &&
+ match(TrueVal, m_Xor(m_Specific(X), m_APInt(C))) && *Y == *C)
+ V = Builder->CreateAnd(X, ~(*Y));
+ // (X & Y) == 0 ? X ^ Y : X --> X | Y
+ else if (Pred == ICmpInst::ICMP_EQ && FalseVal == X &&
+ match(TrueVal, m_Xor(m_Specific(X), m_APInt(C))) && *Y == *C)
+ V = Builder->CreateOr(X, *Y);
+ // (X & Y) != 0 ? X : X ^ Y --> X | Y
+ else if (Pred == ICmpInst::ICMP_NE && TrueVal == X &&
+ match(FalseVal, m_Xor(m_Specific(X), m_APInt(C))) && *Y == *C)
+ V = Builder->CreateOr(X, *Y);
+
+ if (V)
+ return ReplaceInstUsesWith(SI, V);
+ }
+ }
+
if (Value *V = foldSelectICmpAndOr(SI, TrueVal, FalseVal, Builder))
return ReplaceInstUsesWith(SI, V);
ret <2 x i32> %select
}
+; CHECK-LABEL: @select_icmp_and_8_ne_0_xor_8(
+; CHECK-NEXT: [[AND:%[a-z0-9]+]] = and i32 %x, -9
+; CHECK-NEXT: ret i32 [[AND]]
+define i32 @select_icmp_and_8_ne_0_xor_8(i32 %x) {
+ %and = and i32 %x, 8
+ %cmp = icmp eq i32 %and, 0
+ %xor = xor i32 %x, 8
+ %x.xor = select i1 %cmp, i32 %x, i32 %xor
+ ret i32 %x.xor
+}
+
+; CHECK-LABEL: @select_icmp_and_8_eq_0_xor_8(
+; CHECK-NEXT: [[OR:%[a-z0-9]+]] = or i32 %x, 8
+; CHECK-NEXT: ret i32 [[OR]]
+define i32 @select_icmp_and_8_eq_0_xor_8(i32 %x) {
+ %and = and i32 %x, 8
+ %cmp = icmp eq i32 %and, 0
+ %xor = xor i32 %x, 8
+ %xor.x = select i1 %cmp, i32 %xor, i32 %x
+ ret i32 %xor.x
+}
+
+; CHECK-LABEL: @select_icmp_x_and_8_eq_0_y_xor_8(
+; CHECK: select i1 %cmp, i64 %y, i64 %xor
+define i64 @select_icmp_x_and_8_eq_0_y_xor_8(i32 %x, i64 %y) {
+ %and = and i32 %x, 8
+ %cmp = icmp eq i32 %and, 0
+ %xor = xor i64 %y, 8
+ %y.xor = select i1 %cmp, i64 %y, i64 %xor
+ ret i64 %y.xor
+}
+
+; CHECK-LABEL: @select_icmp_x_and_8_ne_0_y_xor_8(
+; CHECK: select i1 %cmp, i64 %xor, i64 %y
+define i64 @select_icmp_x_and_8_ne_0_y_xor_8(i32 %x, i64 %y) {
+ %and = and i32 %x, 8
+ %cmp = icmp eq i32 %and, 0
+ %xor = xor i64 %y, 8
+ %xor.y = select i1 %cmp, i64 %xor, i64 %y
+ ret i64 %xor.y
+}
+
+; CHECK-LABEL: @select_icmp_x_and_8_ne_0_y_or_8(
+; CHECK: xor i64 %1, 8
+; CHECK: or i64 %2, %y
+define i64 @select_icmp_x_and_8_ne_0_y_or_8(i32 %x, i64 %y) {
+ %and = and i32 %x, 8
+ %cmp = icmp eq i32 %and, 0
+ %or = or i64 %y, 8
+ %or.y = select i1 %cmp, i64 %or, i64 %y
+ ret i64 %or.y
+}
+
define i32 @test65(i64 %x) {
%1 = and i64 %x, 16
%2 = icmp ne i64 %1, 0