1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=aarch64-none-linux-gnu -aarch64-atomic-cfg-tidy=0 -verify-machineinstrs -o - %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; LLVM should be able to cope with multiple uses of the same flag-setting 4*9880d681SAndroid Build Coastguard Worker; instruction at different points of a routine. Either by rematerializing the 5*9880d681SAndroid Build Coastguard Worker; compare or by saving and restoring the flag register. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Workerdeclare void @bar() 8*9880d681SAndroid Build Coastguard Worker 9*9880d681SAndroid Build Coastguard Worker@var = global i32 0 10*9880d681SAndroid Build Coastguard Worker 11*9880d681SAndroid Build Coastguard Workerdefine i32 @test_multiflag(i32 %n, i32 %m, i32 %o) { 12*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_multiflag: 13*9880d681SAndroid Build Coastguard Worker 14*9880d681SAndroid Build Coastguard Worker %test = icmp ne i32 %n, %m 15*9880d681SAndroid Build Coastguard Worker; CHECK: cmp [[LHS:w[0-9]+]], [[RHS:w[0-9]+]] 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard Worker %val = zext i1 %test to i32 18*9880d681SAndroid Build Coastguard Worker; CHECK: cset {{[xw][0-9]+}}, ne 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Worker store i32 %val, i32* @var 21*9880d681SAndroid Build Coastguard Worker 22*9880d681SAndroid Build Coastguard Worker call void @bar() 23*9880d681SAndroid Build Coastguard Worker; CHECK: bl bar 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Worker ; Currently, the comparison is emitted again. An MSR/MRS pair would also be 26*9880d681SAndroid Build Coastguard Worker ; acceptable, but assuming the call preserves NZCV is not. 27*9880d681SAndroid Build Coastguard Worker br i1 %test, label %iftrue, label %iffalse 28*9880d681SAndroid Build Coastguard Worker; CHECK: cmp [[LHS]], [[RHS]] 29*9880d681SAndroid Build Coastguard Worker; CHECK: b.eq 30*9880d681SAndroid Build Coastguard Worker 31*9880d681SAndroid Build Coastguard Workeriftrue: 32*9880d681SAndroid Build Coastguard Worker ret i32 42 33*9880d681SAndroid Build Coastguard Workeriffalse: 34*9880d681SAndroid Build Coastguard Worker ret i32 0 35*9880d681SAndroid Build Coastguard Worker} 36