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Driver: default to `-fno-use-cxatexit` on Windows 

This primarily impacts the Windows MSVC and Windows itanium
environments.  Windows MSVC does not use `__cxa_atexit` and Itanium
follows suit.  Simplify the logic for the default value calculation and
blanket the Windows environments to default to off for use of
`__cxa_atexit`.

llvm-svn: 312941
This commit is contained in:
Saleem Abdulrasool 2017-09-11 20:18:09 +00:00
parent 5941b0bb63
commit 015bded23f
2 changed files with 28 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -4022,7 +4022,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
// -fuse-cxa-atexit is default. // -fuse-cxa-atexit is default.
if (!Args.hasFlag( if (!Args.hasFlag(
options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit, options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
!IsWindowsCygnus && !IsWindowsGNU && !RawTriple.isOSWindows() &&
RawTriple.getOS() != llvm::Triple::Solaris && RawTriple.getOS() != llvm::Triple::Solaris &&
getToolChain().getArch() != llvm::Triple::hexagon && getToolChain().getArch() != llvm::Triple::hexagon &&
getToolChain().getArch() != llvm::Triple::xcore && getToolChain().getArch() != llvm::Triple::xcore &&

27
clang/test/Driver/cxa-atexit.cpp Normal file
View File

@ -0,0 +1,27 @@
// RUN: %clang -### -target armv7-unknown-windows-msvc -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target armv7-unknown-windows-itanium -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target armv7-unknown-windows-gnu -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target armv7-unknown-windows-cygnus -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target i686-unknown-windows-msvc -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target i686-unknown-windows-itanium -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target i686-unknown-windows-gnu -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target i686-unknown-windows-cygnus -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target x86_64-unknown-windows-msvc -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target x86_64-unknown-windows-itanium -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target x86_64-unknown-windows-gnu -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target x86_64-unknown-windows-cygnus -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-WINDOWS
// RUN: %clang -### -target hexagon-unknown-none -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-HEXAGON
// RUN: %clang -### -target xcore-unknown-none -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-XCORE
// RUN: %clang -### -target armv7-mti-none -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-MTI
// RUN: %clang -### -target mips-unknown-none -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-MIPS
// RUN: %clang -### -target mips-unknown-none-gnu -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-MIPS
// RUN: %clang -### -target mips-mti-none-gnu -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-MIPS
// RUN: %clang -### -target sparc-sun-solaris -c %s -o /dev/null 2>&1 | FileCheck %s -check-prefix CHECK-SOLARIS
// CHECK-WINDOWS: "-fno-use-cxa-atexit"
// CHECK-SOLARIS: "-fno-use-cxa-atexit"
// CHECK-HEXAGON: "-fno-use-cxa-atexit"
// CHECK-XCORE: "-fno-use-cxa-atexit"
// CHECK-MTI: "-fno-use-cxa-atexit"
// CHECK-MIPS-NOT: "-fno-use-cxa-atexit"