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https://github.com/c64scene-ar/llvm-6502.git
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6c0e04c823
- Besides used in SjLj exception handling, __builtin_setjmp/__longjmp is also used as a light-weight replacement of setjmp/longjmp which are used to implementation continuation, user-level threading, and etc. The support added in this patch ONLY addresses this usage and is NOT intended to support SjLj exception handling as zero-cost DWARF exception handling is used by default in X86. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165989 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.4 KiB
LLVM
47 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=i386-pc-linux -mcpu=corei7 -relocation-model=static | FileCheck --check-prefix=X86 %s
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; RUN: llc < %s -mtriple=x86_64-pc-linux -mcpu=corei7 | FileCheck --check-prefix=X64 %s
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@buf = internal global [5 x i8*] zeroinitializer
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declare i8* @llvm.frameaddress(i32) nounwind readnone
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declare i8* @llvm.stacksave() nounwind
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declare i32 @llvm.eh.sjlj.setjmp(i8*) nounwind
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declare void @llvm.eh.sjlj.longjmp(i8*) nounwind
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define i32 @sj0() nounwind {
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%fp = tail call i8* @llvm.frameaddress(i32 0)
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store i8* %fp, i8** getelementptr inbounds ([5 x i8*]* @buf, i64 0, i64 0), align 16
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%sp = tail call i8* @llvm.stacksave()
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store i8* %sp, i8** getelementptr inbounds ([5 x i8*]* @buf, i64 0, i64 2), align 16
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%r = tail call i32 @llvm.eh.sjlj.setjmp(i8* bitcast ([5 x i8*]* @buf to i8*))
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ret i32 %r
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; X86: sj0
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; x86: movl %ebp, buf
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; x86: movl ${{.*LBB.*}}, buf+4
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; X86: movl %esp, buf+8
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; X86: ret
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; X64: sj0
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; x64: movq %rbp, buf(%rip)
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; x64: movq ${{.*LBB.*}}, buf+8(%rip)
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; X64: movq %rsp, buf+16(%rip)
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; X64: ret
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}
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define void @lj0() nounwind {
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tail call void @llvm.eh.sjlj.longjmp(i8* bitcast ([5 x i8*]* @buf to i8*))
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unreachable
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; X86: lj0
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; X86: movl buf, %ebp
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; X86: movl buf+4, %[[REG32:.*]]
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; X86: movl buf+8, %esp
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; X86: jmpl *%[[REG32]]
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; X64: lj0
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; X64: movq buf(%rip), %rbp
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; X64: movq buf+8(%rip), %[[REG64:.*]]
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; X64: movq buf+16(%rip), %rsp
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; X64: jmpq *%[[REG64]]
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}
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