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Diffstat (limited to 'test/CodeGen/X86/stackpointer.ll')
-rw-r--r-- | test/CodeGen/X86/stackpointer.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/X86/stackpointer.ll b/test/CodeGen/X86/stackpointer.ll new file mode 100644 index 0000000000..26f9999fd5 --- /dev/null +++ b/test/CodeGen/X86/stackpointer.ll @@ -0,0 +1,25 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s +; RUN: llc < %s -mtriple=x86_64-linux-gnueabi | FileCheck %s + +define i64 @get_stack() nounwind { +entry: +; CHECK-LABEL: get_stack: +; CHECK: movq %rsp, %rax + %sp = call i64 @llvm.read_register.i64(metadata !0) + ret i64 %sp +} + +define void @set_stack(i64 %val) nounwind { +entry: +; CHECK-LABEL: set_stack: +; CHECK: movq %rdi, %rsp + call void @llvm.write_register.i64(metadata !0, i64 %val) + ret void +} + +declare i64 @llvm.read_register.i64(metadata) nounwind +declare void @llvm.write_register.i64(metadata, i64) nounwind + +; register unsigned long current_stack_pointer asm("rsp"); +; CHECK-NOT: .asciz "rsp" +!0 = metadata !{metadata !"rsp\00"} |