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[AArch64] [MinGW] Allow enabling SEH exceptions
The default still is dwarf, but SEH exceptions can now be enabled optionally for the MinGW target. Differential Revision: https://reviews.llvm.org/D55748 llvm-svn: 349451
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@ -510,7 +510,7 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
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".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
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SectionKind::getReadOnly());
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if (T.getArch() == Triple::x86_64) {
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if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::aarch64) {
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// On Windows 64 with SEH, the LSDA is emitted into the .xdata section
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LSDASection = nullptr;
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} else {
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@ -132,4 +132,7 @@ AArch64MCAsmInfoGNUCOFF::AArch64MCAsmInfoGNUCOFF() {
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CommentString = "//";
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ExceptionsType = ExceptionHandling::DwarfCFI;
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// The default is dwarf, but WinEH can be enabled optionally, which requires
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// WinEHEncodingType to be set.
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WinEHEncodingType = WinEH::EncodingType::Itanium;
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}
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48
test/CodeGen/AArch64/wineh-mingw.ll
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48
test/CodeGen/AArch64/wineh-mingw.ll
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@ -0,0 +1,48 @@
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; RUN: llc < %s -exception-model=wineh -mtriple=aarch64-pc-mingw32 | FileCheck %s -check-prefix=WINEH
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; RUN: llc < %s -exception-model=wineh -mtriple=aarch64-pc-mingw32 -filetype=obj | llvm-readobj -s | FileCheck %s -check-prefix=WINEH-SECTIONS
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; Check emission of eh handler and handler data
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declare i32 @_d_eh_personality(i32, i32, i64, i8*, i8*)
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declare void @_d_eh_resume_unwind(i8*)
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declare i32 @bar()
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define i32 @foo4() #0 personality i32 (i32, i32, i64, i8*, i8*)* @_d_eh_personality {
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entry:
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%step = alloca i32, align 4
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store i32 0, i32* %step
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%tmp = load i32, i32* %step
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%tmp1 = invoke i32 @bar()
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to label %finally unwind label %landingpad
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finally:
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store i32 1, i32* %step
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br label %endtryfinally
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landingpad:
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%landing_pad = landingpad { i8*, i32 }
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cleanup
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%tmp3 = extractvalue { i8*, i32 } %landing_pad, 0
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store i32 2, i32* %step
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call void @_d_eh_resume_unwind(i8* %tmp3)
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unreachable
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endtryfinally:
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%tmp10 = load i32, i32* %step
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ret i32 %tmp10
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}
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; WINEH-LABEL: foo4:
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; WINEH: .seh_proc foo4
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; WINEH: .seh_handler _d_eh_personality, @unwind, @except
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; WINEH: ret
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; WINEH: .section .xdata,"dr"
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; WINEH-NEXT: .seh_handlerdata
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; WINEH-NEXT: .text
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; WINEH-NEXT: .seh_endproc
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; WINEH: .section .xdata,"dr"
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; WINEH-NEXT: .p2align 2
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; WINEH-NEXT: GCC_except_table0:
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; WINEH-SECTIONS: Name: .xdata
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; WINEH-SECTIONS-NOT: Name: .gcc_except_table
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