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1; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s2; RUN: llc < %s -mtriple=x86_64-linux-gnueabi | FileCheck %s3; RUN: opt < %s -O3 -S -mtriple=x86_64-linux-gnueabi | FileCheck %s --check-prefix=OPT4 5define i64 @get_stack() nounwind {6entry:7; CHECK-LABEL: get_stack:8; CHECK: movq %rsp, %rax9 %sp = call i64 @llvm.read_register.i64(metadata !0)10; OPT: @llvm.read_register.i6411 ret i64 %sp12}13 14define void @set_stack(i64 %val) nounwind {15entry:16; CHECK-LABEL: set_stack:17; CHECK: movq %rdi, %rsp18 call void @llvm.write_register.i64(metadata !0, i64 %val)19; OPT: @llvm.write_register.i6420 ret void21}22 23declare i64 @llvm.read_register.i64(metadata) nounwind24declare void @llvm.write_register.i64(metadata, i64) nounwind25 26; register unsigned long current_stack_pointer asm("rsp");27; CHECK-NOT: .asciz "rsp"28!0 = !{!"rsp\00"}29