averello/swift-mirror
1
0
Fork 0
mirror of https://github.com/apple/swift.git synced 2025-12-14 20:36:38 +01:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #83909 from DougGregor/embedded-darwin-reserve-4kb

Browse Source 
[Embedded] Only reserve 4KB in embedded Darwin targets
This commit is contained in:
Doug Gregor
2025-08-26 04:55:46 -07:00
committed by GitHub
parent 3a8399d4e1 923689c2b4
commit a5fa3edf54
2 changed files with 29 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
lib/IRGen/SwiftTargetInfo.cpp
View File

@@ -49,7 +49,10 @@ static void configureARM64(IRGenModule &IGM, const llvm::Triple &triple,
}
setToMask(target.IsObjCPointerBit, 64, SWIFT_ABI_ARM64_IS_OBJC_BIT);
if (triple.isOSDarwin()) {
// Non-embedded Darwin reserves the low 4GB of address space.
if (triple.isOSDarwin() &&
!IGM.getSwiftModule()->getASTContext().LangOpts.hasFeature(
Feature::Embedded)) {
target.LeastValidPointerValue =
SWIFT_ABI_DARWIN_ARM64_LEAST_VALID_POINTER;
}
@@ -104,7 +107,9 @@ static void configureX86_64(IRGenModule &IGM, const llvm::Triple &triple,
SWIFT_ABI_X86_64_OBJC_RESERVED_BITS_MASK);
}
if (triple.isOSDarwin()) {
if (triple.isOSDarwin() &&
!IGM.getSwiftModule()->getASTContext().LangOpts.hasFeature(
Feature::Embedded)) {
target.LeastValidPointerValue =
SWIFT_ABI_DARWIN_X86_64_LEAST_VALID_POINTER;
}

22
test/embedded/min-pointer-value-default-darwin.swift Normal file
View File

@@ -0,0 +1,22 @@
// RUN: %target-swift-emit-ir %s -module-name main -parse-as-library -enable-experimental-feature Embedded -O -min-valid-pointer-value=0x1000 | %FileCheck %s
// RUN: %target-swift-emit-ir %s -module-name main -parse-as-library -enable-experimental-feature Embedded -O | %FileCheck %s
// REQUIRES: OS=macosx
// REQUIRES: swift_feature_Embedded
public func testit(_ s: S?) -> Bool {
return s != nil
}
class C {}
public struct S {
var a = InlineArray<57, UInt8>(repeating: 0)
var b = C()
var c = InlineArray<49, UInt8>(repeating: 0)
}
// CHECK-LABEL: define {{.*}} @"$e4main1SVSgWOg"(ptr %0)
// CHECK: icmp {{.*}}, 4095
// CHECK-LABEL: }