1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=armv7 -mattr=+db | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=thumbv7 -mattr=+db | FileCheck %s 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test 5*9880d681SAndroid Build Coastguard Workerdefine void @test() { 6*9880d681SAndroid Build Coastguard Worker call void @llvm.arm.dmb(i32 3) ; CHECK: dmb osh 7*9880d681SAndroid Build Coastguard Worker call void @llvm.arm.dsb(i32 7) ; CHECK: dsb nsh 8*9880d681SAndroid Build Coastguard Worker call void @llvm.arm.isb(i32 15) ; CHECK: isb sy 9*9880d681SAndroid Build Coastguard Worker ret void 10*9880d681SAndroid Build Coastguard Worker} 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Worker; Important point is that the compiler should not reorder memory access 13*9880d681SAndroid Build Coastguard Worker; instructions around DMB. 14*9880d681SAndroid Build Coastguard Worker; Failure to do so, two STRs will collapse into one STRD. 15*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_dmb_reordering 16*9880d681SAndroid Build Coastguard Workerdefine void @test_dmb_reordering(i32 %a, i32 %b, i32* %d) { 17*9880d681SAndroid Build Coastguard Worker store i32 %a, i32* %d ; CHECK: str {{r[0-9]+}}, [{{r[0-9]+}}] 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Worker call void @llvm.arm.dmb(i32 15) ; CHECK: dmb sy 20*9880d681SAndroid Build Coastguard Worker 21*9880d681SAndroid Build Coastguard Worker %d1 = getelementptr i32, i32* %d, i32 1 22*9880d681SAndroid Build Coastguard Worker store i32 %b, i32* %d1 ; CHECK: str {{r[0-9]+}}, [{{r[0-9]+}}, #4] 23*9880d681SAndroid Build Coastguard Worker 24*9880d681SAndroid Build Coastguard Worker ret void 25*9880d681SAndroid Build Coastguard Worker} 26*9880d681SAndroid Build Coastguard Worker 27*9880d681SAndroid Build Coastguard Worker; Similarly for DSB. 28*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_dsb_reordering 29*9880d681SAndroid Build Coastguard Workerdefine void @test_dsb_reordering(i32 %a, i32 %b, i32* %d) { 30*9880d681SAndroid Build Coastguard Worker store i32 %a, i32* %d ; CHECK: str {{r[0-9]+}}, [{{r[0-9]+}}] 31*9880d681SAndroid Build Coastguard Worker 32*9880d681SAndroid Build Coastguard Worker call void @llvm.arm.dsb(i32 15) ; CHECK: dsb sy 33*9880d681SAndroid Build Coastguard Worker 34*9880d681SAndroid Build Coastguard Worker %d1 = getelementptr i32, i32* %d, i32 1 35*9880d681SAndroid Build Coastguard Worker store i32 %b, i32* %d1 ; CHECK: str {{r[0-9]+}}, [{{r[0-9]+}}, #4] 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Worker ret void 38*9880d681SAndroid Build Coastguard Worker} 39*9880d681SAndroid Build Coastguard Worker 40*9880d681SAndroid Build Coastguard Worker; And ISB. 41*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_isb_reordering 42*9880d681SAndroid Build Coastguard Workerdefine void @test_isb_reordering(i32 %a, i32 %b, i32* %d) { 43*9880d681SAndroid Build Coastguard Worker store i32 %a, i32* %d ; CHECK: str {{r[0-9]+}}, [{{r[0-9]+}}] 44*9880d681SAndroid Build Coastguard Worker 45*9880d681SAndroid Build Coastguard Worker call void @llvm.arm.isb(i32 15) ; CHECK: isb sy 46*9880d681SAndroid Build Coastguard Worker 47*9880d681SAndroid Build Coastguard Worker %d1 = getelementptr i32, i32* %d, i32 1 48*9880d681SAndroid Build Coastguard Worker store i32 %b, i32* %d1 ; CHECK: str {{r[0-9]+}}, [{{r[0-9]+}}, #4] 49*9880d681SAndroid Build Coastguard Worker 50*9880d681SAndroid Build Coastguard Worker ret void 51*9880d681SAndroid Build Coastguard Worker} 52*9880d681SAndroid Build Coastguard Worker 53*9880d681SAndroid Build Coastguard Workerdeclare void @llvm.arm.dmb(i32) 54*9880d681SAndroid Build Coastguard Workerdeclare void @llvm.arm.dsb(i32) 55*9880d681SAndroid Build Coastguard Workerdeclare void @llvm.arm.isb(i32) 56