31 lines
1.2 KiB
LLVM
31 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
|
|
; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
|
|
|
|
define void @prefault(ptr noundef %range_start, ptr noundef readnone %range_end) {
|
|
; CHECK-LABEL: prefault:
|
|
; CHECK: # %bb.0: # %entry
|
|
; CHECK-NEXT: cmpq %rsi, %rdi
|
|
; CHECK-NEXT: jae .LBB0_3
|
|
; CHECK-NEXT: .p2align 4, 0x90
|
|
; CHECK-NEXT: .LBB0_1: # %while.body
|
|
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
|
|
; CHECK-NEXT: lock orb $0, (%rdi)
|
|
; CHECK-NEXT: addq $4096, %rdi # imm = 0x1000
|
|
; CHECK-NEXT: cmpq %rsi, %rdi
|
|
; CHECK-NEXT: jb .LBB0_1
|
|
; CHECK-NEXT: .LBB0_3: # %while.end
|
|
; CHECK-NEXT: retq
|
|
entry:
|
|
%cmp3 = icmp ult ptr %range_start, %range_end
|
|
br i1 %cmp3, label %while.body, label %while.end
|
|
|
|
while.body: ; preds = %entry, %while.body
|
|
%start.04 = phi ptr [ %add.ptr, %while.body ], [ %range_start, %entry ]
|
|
%0 = atomicrmw volatile or ptr %start.04, i8 0 monotonic, align 1
|
|
%add.ptr = getelementptr inbounds i8, ptr %start.04, i64 4096
|
|
%cmp = icmp ult ptr %add.ptr, %range_end
|
|
br i1 %cmp, label %while.body, label %while.end
|
|
|
|
while.end: ; preds = %while.body, %entry
|
|
ret void
|
|
}
|