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Do not add uwtable attribute by default for MachO targets. 

r217178 changed clang to add function attribute uwtable by default on
Win64, which caused the __eh_frame section to be emitted by default.
This commit restores the previous behavior for MachO targets.

rdar://problem/25282627


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@268589 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2016-05-05 01:41:07 +00:00
parent 6ddd583f7f
commit f47686bf3d
2 changed files with 9 additions and 0 deletions
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5
lib/Driver/MSVCToolChain.cpp
View File

@ -71,6 +71,11 @@ bool MSVCToolChain::IsUnwindTablesDefault() const {
// Emit unwind tables by default on Win64. All non-x86_32 Windows platforms
// such as ARM and PPC actually require unwind tables, but LLVM doesn't know
// how to generate them yet.
// Don't emit unwind tables by default for MachO targets.
if (getTriple().isOSBinFormatMachO())
return false;
return getArch() == llvm::Triple::x86_64;
}

4
test/Driver/win-macho-unwind.c Normal file
View File

@ -0,0 +1,4 @@
// RUN: %clang -target x86_64-pc-win32-macho -### -S %s -o %t.s 2>&1 | FileCheck %s
// Do not add function attribute "uwtable" for macho targets.
// CHECK-NOT: -munwind-tables