[llvm] DynamicAPInt: Support APInt constructor. (PR #146301)
Zakk Chen via llvm-commits
llvm-commits at lists.llvm.org
Mon Jun 30 07:48:58 PDT 2025
https://github.com/zakk0610 updated https://github.com/llvm/llvm-project/pull/146301
>From f6e1fe4fdce3d12780f7af2d2529535c35eea803 Mon Sep 17 00:00:00 2001
From: Zakk Chen <zakk0610 at gmail.com>
Date: Mon, 30 Jun 2025 02:29:48 +0000
Subject: [PATCH] DynamicAPInt: Support APInt constructor.
---
llvm/include/llvm/ADT/DynamicAPInt.h | 9 +++++++++
llvm/unittests/ADT/DynamicAPIntTest.cpp | 10 ++++++++++
2 files changed, 19 insertions(+)
diff --git a/llvm/include/llvm/ADT/DynamicAPInt.h b/llvm/include/llvm/ADT/DynamicAPInt.h
index ca010f836de6f..07015b4a8dd80 100644
--- a/llvm/include/llvm/ADT/DynamicAPInt.h
+++ b/llvm/include/llvm/ADT/DynamicAPInt.h
@@ -16,6 +16,7 @@
#ifndef LLVM_ADT_DYNAMICAPINT_H
#define LLVM_ADT_DYNAMICAPINT_H
+#include "llvm/ADT/APInt.h"
#include "llvm/ADT/SlowDynamicAPInt.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MathExtras.h"
@@ -116,6 +117,14 @@ class DynamicAPInt {
: ValSmall(Val) {
ValLarge.Val.BitWidth = 0;
}
+ LLVM_ATTRIBUTE_ALWAYS_INLINE explicit DynamicAPInt(const APInt &Val) {
+ if (Val.getBitWidth() <= 64) {
+ ValSmall = Val.getSExtValue();
+ ValLarge.Val.BitWidth = 0;
+ } else {
+ new (&ValLarge) detail::SlowDynamicAPInt(Val);
+ }
+ }
LLVM_ATTRIBUTE_ALWAYS_INLINE DynamicAPInt() : DynamicAPInt(0) {}
LLVM_ATTRIBUTE_ALWAYS_INLINE ~DynamicAPInt() {
if (LLVM_UNLIKELY(isLarge()))
diff --git a/llvm/unittests/ADT/DynamicAPIntTest.cpp b/llvm/unittests/ADT/DynamicAPIntTest.cpp
index 932b750608b3e..fafd8fda08687 100644
--- a/llvm/unittests/ADT/DynamicAPIntTest.cpp
+++ b/llvm/unittests/ADT/DynamicAPIntTest.cpp
@@ -31,6 +31,16 @@ class TypeNames {
};
TYPED_TEST_SUITE(IntTest, TypeList, TypeNames);
+TYPED_TEST(IntTest, ValueInit) {
+ APInt Large(65, 0, true);
+ Large.setBit(64);
+ TypeParam DynLarge(1ll << 63);
+ EXPECT_EQ(TypeParam(Large), DynLarge + DynLarge);
+ APInt Small(64, -1, true);
+ TypeParam DynSmall(Small.getSExtValue());
+ EXPECT_EQ(TypeParam(Small), DynSmall);
+}
+
TYPED_TEST(IntTest, ops) {
TypeParam Two(2), Five(5), Seven(7), Ten(10);
EXPECT_EQ(Five + Five, Ten);
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