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| author | Michael Liao <michael.liao@intel.com> | 2012-10-15 22:39:43 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2012-10-15 22:39:43 +0000 |
| commit | 6c0e04c823cf4034214b050e338c99a401edd2ac (patch) | |
| tree | 9d754ca7a1983865bf8e149c73d94c02dfa3bb05 /test | |
| parent | 790047620a8f31cee1841c06c9e5e7688166ad93 (diff) | |
| download | llvm-6c0e04c823cf4034214b050e338c99a401edd2ac.tar.gz llvm-6c0e04c823cf4034214b050e338c99a401edd2ac.tar.bz2 llvm-6c0e04c823cf4034214b050e338c99a401edd2ac.tar.xz | |
Add __builtin_setjmp/_longjmp supprt in X86 backend
- 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
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/sjlj.ll | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/test/CodeGen/X86/sjlj.ll b/test/CodeGen/X86/sjlj.ll new file mode 100644 index 0000000000..d594e98299 --- /dev/null +++ b/test/CodeGen/X86/sjlj.ll @@ -0,0 +1,46 @@ +; RUN: llc < %s -mtriple=i386-pc-linux -mcpu=corei7 -relocation-model=static | FileCheck --check-prefix=X86 %s +; RUN: llc < %s -mtriple=x86_64-pc-linux -mcpu=corei7 | FileCheck --check-prefix=X64 %s + +@buf = internal global [5 x i8*] zeroinitializer + +declare i8* @llvm.frameaddress(i32) nounwind readnone + +declare i8* @llvm.stacksave() nounwind + +declare i32 @llvm.eh.sjlj.setjmp(i8*) nounwind + +declare void @llvm.eh.sjlj.longjmp(i8*) nounwind + +define i32 @sj0() nounwind { + %fp = tail call i8* @llvm.frameaddress(i32 0) + store i8* %fp, i8** getelementptr inbounds ([5 x i8*]* @buf, i64 0, i64 0), align 16 + %sp = tail call i8* @llvm.stacksave() + store i8* %sp, i8** getelementptr inbounds ([5 x i8*]* @buf, i64 0, i64 2), align 16 + %r = tail call i32 @llvm.eh.sjlj.setjmp(i8* bitcast ([5 x i8*]* @buf to i8*)) + ret i32 %r +; X86: sj0 +; x86: movl %ebp, buf +; x86: movl ${{.*LBB.*}}, buf+4 +; X86: movl %esp, buf+8 +; X86: ret +; X64: sj0 +; x64: movq %rbp, buf(%rip) +; x64: movq ${{.*LBB.*}}, buf+8(%rip) +; X64: movq %rsp, buf+16(%rip) +; X64: ret +} + +define void @lj0() nounwind { + tail call void @llvm.eh.sjlj.longjmp(i8* bitcast ([5 x i8*]* @buf to i8*)) + unreachable +; X86: lj0 +; X86: movl buf, %ebp +; X86: movl buf+4, %[[REG32:.*]] +; X86: movl buf+8, %esp +; X86: jmpl *%[[REG32]] +; X64: lj0 +; X64: movq buf(%rip), %rbp +; X64: movq buf+8(%rip), %[[REG64:.*]] +; X64: movq buf+16(%rip), %rsp +; X64: jmpq *%[[REG64]] +} |