[PATCH] D64038: [IR][PatternMatch] Introduce m_NegatedPower2() matcher
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Thu Jul 25 06:37:15 PDT 2019
This revision was automatically updated to reflect the committed changes.
Closed by commit rL367017: [IR][PatternMatch] Introduce m_NegatedPower2() matcher (authored by lebedevri, committed by ).
Changed prior to commit:
https://reviews.llvm.org/D64038?vs=211729&id=211737#toc
Repository:
rL LLVM
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D64038/new/
https://reviews.llvm.org/D64038
Files:
llvm/trunk/include/llvm/IR/PatternMatch.h
llvm/trunk/unittests/IR/PatternMatch.cpp
Index: llvm/trunk/unittests/IR/PatternMatch.cpp
===================================================================
--- llvm/trunk/unittests/IR/PatternMatch.cpp
+++ llvm/trunk/unittests/IR/PatternMatch.cpp
@@ -7,6 +7,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/IR/PatternMatch.h"
+#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/BasicBlock.h"
@@ -470,6 +471,26 @@
EXPECT_FALSE(m_Unless(m_c_Add(m_Zero(), m_One())).match(X));
}
+TEST_F(PatternMatchTest, Power2) {
+ Value *C128 = IRB.getInt32(128);
+ Value *CNeg128 = ConstantExpr::getNeg(cast<Constant>(C128));
+
+ EXPECT_TRUE(m_Power2().match(C128));
+ EXPECT_FALSE(m_Power2().match(CNeg128));
+
+ EXPECT_FALSE(m_NegatedPower2().match(C128));
+ EXPECT_TRUE(m_NegatedPower2().match(CNeg128));
+
+ Value *CIntMin = IRB.getInt64(APSInt::getSignedMinValue(64).getSExtValue());
+ Value *CNegIntMin = ConstantExpr::getNeg(cast<Constant>(CIntMin));
+
+ EXPECT_TRUE(m_Power2().match(CIntMin));
+ EXPECT_TRUE(m_Power2().match(CNegIntMin));
+
+ EXPECT_TRUE(m_NegatedPower2().match(CIntMin));
+ EXPECT_TRUE(m_NegatedPower2().match(CNegIntMin));
+}
+
TEST_F(PatternMatchTest, CommutativeDeferredValue) {
Value *X = IRB.getInt32(1);
Value *Y = IRB.getInt32(2);
Index: llvm/trunk/include/llvm/IR/PatternMatch.h
===================================================================
--- llvm/trunk/include/llvm/IR/PatternMatch.h
+++ llvm/trunk/include/llvm/IR/PatternMatch.h
@@ -411,6 +411,18 @@
return V;
}
+struct is_negated_power2 {
+ bool isValue(const APInt &C) { return (-C).isPowerOf2(); }
+};
+/// Match a integer or vector negated power-of-2.
+/// For vectors, this includes constants with undefined elements.
+inline cst_pred_ty<is_negated_power2> m_NegatedPower2() {
+ return cst_pred_ty<is_negated_power2>();
+}
+inline api_pred_ty<is_negated_power2> m_NegatedPower2(const APInt *&V) {
+ return V;
+}
+
struct is_power2_or_zero {
bool isValue(const APInt &C) { return !C || C.isPowerOf2(); }
};
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