1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc -mtriple=x86_64-linux-gnu < %s | FileCheck %s 3 4%"struct.std::atomic" = type { %"struct.std::atomic_bool" } 5%"struct.std::atomic_bool" = type { %"struct.std::__atomic_base" } 6%"struct.std::__atomic_base" = type { i8 } 7 8; CHECK-LABEL: _Z3fooRSt6atomicIbEb 9define zeroext i1 @_Z3fooRSt6atomicIbEb(%"struct.std::atomic"* nocapture dereferenceable(1) %a, i1 returned zeroext %b) nounwind { 10; CHECK-LABEL: _Z3fooRSt6atomicIbEb: 11; CHECK: # %bb.0: # %entry 12; CHECK-NEXT: movq %rdi, %rax 13; CHECK-NEXT: shrq $3, %rax 14; CHECK-NEXT: movb 2147450880(%rax), %al 15; CHECK-NEXT: testb %al, %al 16; CHECK-NEXT: je .LBB0_3 17; CHECK-NEXT: # %bb.1: 18; CHECK-NEXT: movl %edi, %ecx 19; CHECK-NEXT: andl $7, %ecx 20; CHECK-NEXT: cmpb %al, %cl 21; CHECK-NEXT: jge .LBB0_2 22; CHECK-NEXT: .LBB0_3: 23; CHECK-NEXT: movl %esi, %eax 24; CHECK-NEXT: xchgb %al, (%rdi) 25; CHECK-NEXT: movl %esi, %eax 26; CHECK-NEXT: retq 27; CHECK-NEXT: .LBB0_2: 28; CHECK-NEXT: pushq %rax 29; CHECK-NEXT: callq __asan_report_store1 30; CHECK-NEXT: #APP 31; CHECK-NEXT: #NO_APP 32entry: 33 %frombool.i.i = zext i1 %b to i8 34 %_M_i.i.i = getelementptr inbounds %"struct.std::atomic", %"struct.std::atomic"* %a, i64 0, i32 0, i32 0, i32 0 35 %0 = ptrtoint i8* %_M_i.i.i to i64 36 %1 = lshr i64 %0, 3 37 %2 = add i64 %1, 2147450880 38 %3 = inttoptr i64 %2 to i8* 39 %4 = load i8, i8* %3 40 %5 = icmp ne i8 %4, 0 41 br i1 %5, label %6, label %11 42 43; <label>:6: ; preds = %entry 44 %7 = and i64 %0, 7 45 %8 = trunc i64 %7 to i8 46 %9 = icmp sge i8 %8, %4 47 br i1 %9, label %10, label %11 48 49; <label>:10: ; preds = %6 50 call void @__asan_report_store1(i64 %0) 51 call void asm sideeffect "", ""() 52 unreachable 53 54; <label>:11: ; preds = %6, %entry 55 store atomic i8 %frombool.i.i, i8* %_M_i.i.i seq_cst, align 1 56 ret i1 %b 57} 58 59declare void @__asan_report_store1(i64) 60