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[X86] Fix SJLJ struct offsets for x86_64

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This is necessary, but not sufficient, for having working SJLJ exception
handling on x86_64.

Differential Revision: https://reviews.llvm.org/D38254

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314277 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Martin Storsjo 2017-09-27 06:08:23 +00:00
parent 1c1a8893a9
commit 689eef08f4
2 changed files with 50 additions and 2 deletions
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4
lib/Target/X86/X86ISelLowering.cpp
View File

@ -26464,7 +26464,7 @@ void X86TargetLowering::SetupEntryBlockForSjLj(MachineInstr &MI,
}
MachineInstrBuilder MIB = BuildMI(*MBB, MI, DL, TII->get(Op));
addFrameReference(MIB, FI, 36);
addFrameReference(MIB, FI, Subtarget.is64Bit() ? 56 : 36);
if (UseImmLabel)
MIB.addMBB(DispatchBB);
else
@ -26572,7 +26572,7 @@ X86TargetLowering::EmitSjLjDispatchBlock(MachineInstr &MI,
unsigned IReg = MRI->createVirtualRegister(&X86::GR32RegClass);
addFrameReference(BuildMI(DispatchBB, DL, TII->get(X86::MOV32rm), IReg), FI,
4);
Subtarget.is64Bit() ? 8 : 4);
BuildMI(DispatchBB, DL, TII->get(X86::CMP32ri))
.addReg(IReg)
.addImm(LPadList.size());

48
test/CodeGen/X86/sjlj-eh.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -mtriple i386-windows-gnu -exception-model sjlj -filetype asm -o - %s | FileCheck %s
; RUN: llc -mtriple x86_64-windows-gnu -exception-model sjlj -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-X64
declare void @_Z20function_that_throwsv()
declare i32 @__gxx_personality_sj0(...)
@ -69,3 +70,50 @@ try.cont:
; *Handlers[UFC.__callsite]
; CHECK: jmpl *LJTI
; struct _Unwind_FunctionContext {
; +00 struct _Unwind_FunctionContext *prev; -312(%rbp)
; +08 uint32_t __callsite; -304(%rbp)
; +12 uint32_t __buffer[4]; -300(%rbp)
; +32 __personality_routine __personality; -280(%rbp)
; +40 uintptr_t __lsda; -272(%rbp)
; +48 void *__jbuf[]; -264(%rbp)
; };
; CHECK-X64-LABEL: _Z8functionv:
; struct _Unwind_FunctionContext UFC;
;
; UFC.__personality = __gxx_personality_sj0
; CHECK-X64: leaq __gxx_personality_sj0(%rip), %rax
; CHECK-X64: movq %rax, -280(%rbp)
; UFC.__lsda = $LSDA
; CHECK-X64: movl $[[LSDA:GCC_except_table[0-9]+]], %eax
; CHECK-X64: movq %rax, -272(%rbp)
; UFC.__jbuf[0] = $RBP
; CHECK-X64: movq %rbp, -264(%rbp)
; UFC.__jbuf[2] = $RSP
; CHECK-X64: movq %rsp, -248(%rbp)
; UFC.__jbuf[1] = $RIP
; CHECK-X64: leaq .[[RESUME:LBB[0-9]+_[0-9]+]](%rip), %rax
; CHECK-X64: movq %rax, -256(%rbp)
; UFC.__callsite = 1
; CHECK-X64: movl $1, -304(%rbp)
; _Unwind_SjLj_Register(&UFC);
; CHECK-X64: leaq -312(%rbp), %rcx
; CHECK-X64: callq _Unwind_SjLj_Register
; function_that_throws();
; CHECK-X64: callq _Z20function_that_throwsv
; _Unwind_SjLj_Unregister(&UFC);
; CHECK-X64: leaq -312(%rbp), %rcx
; CHECK-X64: callq _Unwind_SjLj_Unregister
;
; CHECK-X64: [[RESUME]]:
; assert(UFC.__callsite < 1);
; CHECK-X64: movl -304(%rbp), %eax
; CHECK-X64: cmpl $1, %eax
; CHECK-X64: jb .[[CONT:LBB[0-9]+_[0-9]+]]
; CHECK-X64: ud2
; CHECK-X64: [[CONT]]:
; *Handlers[UFC.__callsite]
; CHECK-X64: jmpq *.LJTI