72 lines
1.7 KiB
LLVM
72 lines
1.7 KiB
LLVM
; RUN: sed -e 's/SLHATTR/speculative_load_hardening/' %s | llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu | FileCheck %s --check-prefixes=CHECK,SLH
|
|
; RUN: sed -e 's/SLHATTR//' %s | llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu | FileCheck %s --check-prefixes=CHECK,NOSLH
|
|
|
|
declare i64 @g(i64, i64) local_unnamed_addr
|
|
define i64 @f_using_reserved_reg_x16(i64 %a, i64 %b) local_unnamed_addr SLHATTR {
|
|
; CHECK-LABEL: f_using_reserved_reg_x16
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
entry:
|
|
%cmp = icmp ugt i64 %a, %b
|
|
br i1 %cmp, label %if.then, label %cleanup
|
|
|
|
; CHECK: b.ls
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
if.then:
|
|
%0 = tail call i64 asm "hint #12", "={x17},{x16},0"(i64 %b, i64 %a)
|
|
; CHECK: bl g
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
; CHECK: ret
|
|
%call = tail call i64 @g(i64 %a, i64 %b) #3
|
|
%add = add i64 %call, %0
|
|
br label %cleanup
|
|
|
|
cleanup:
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
; SLH: ret
|
|
%retval.0 = phi i64 [ %add, %if.then ], [ %b, %entry ]
|
|
ret i64 %retval.0
|
|
}
|
|
|
|
define i32 @f_clobbered_reg_w16(i32 %a, i32 %b) local_unnamed_addr SLHATTR {
|
|
; CHECK-LABEL: f_clobbered_reg_w16
|
|
entry:
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
%cmp = icmp sgt i32 %a, %b
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
; CHECK: b.le
|
|
|
|
if.then:
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
; CHECK: mov w16, w0
|
|
tail call void asm sideeffect "mov w16, ${0:w}", "r,~{w16}"(i32 %a)
|
|
br label %if.end
|
|
; SLH: ret
|
|
|
|
if.end:
|
|
%add = add nsw i32 %b, %a
|
|
ret i32 %add
|
|
; SLH: dsb sy
|
|
; SLH: isb
|
|
; NOSLH-NOT: dsb sy
|
|
; NOSLH-NOT: isb
|
|
; SLH: ret
|
|
}
|