vendor/llvm/llvm-release_350-r216957

1 files changed, 28 insertions, 0 deletions

diff --git a/test/CodeGen/X86/stackpointer.ll b/test/CodeGen/X86/stackpointer.ll
new file mode 100644
index 000000000000..80bcfbf16743
--- /dev/null
+++ b/test/CodeGen/X86/stackpointer.ll
@@ -0,0 +1,28 @@
+; RUN: llc < %s -mtriple=x86_64-apple-darwin  | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-linux-gnueabi | FileCheck %s
+; RUN: opt < %s -O3 -S -mtriple=x86_64-linux-gnueabi | FileCheck %s --check-prefix=OPT
+
+define i64 @get_stack() nounwind {
+entry:
+; CHECK-LABEL: get_stack:
+; CHECK: movq	%rsp, %rax
+	%sp = call i64 @llvm.read_register.i64(metadata !0)
+; OPT: @llvm.read_register.i64
+  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)
+; OPT: @llvm.write_register.i64
+  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"}