1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mcpu=generic -mtriple=i386-apple-darwin -tailcallopt -enable-misched=false < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; Check that lowered argumens do not overwrite the return address before it is moved. 3*9880d681SAndroid Build Coastguard Worker; Bug 6225 4*9880d681SAndroid Build Coastguard Worker; 5*9880d681SAndroid Build Coastguard Worker; If a call is a fastcc tail call and tail call optimization is enabled, the 6*9880d681SAndroid Build Coastguard Worker; caller frame is replaced by the callee frame. This can require that arguments are 7*9880d681SAndroid Build Coastguard Worker; placed on the former return address stack slot. Special care needs to be taken 8*9880d681SAndroid Build Coastguard Worker; taken that the return address is moved / or stored in a register before 9*9880d681SAndroid Build Coastguard Worker; lowering of arguments potentially overwrites the value. 10*9880d681SAndroid Build Coastguard Worker; 11*9880d681SAndroid Build Coastguard Worker; Move return address (76(%esp)) to a temporary register (%ebp) 12*9880d681SAndroid Build Coastguard Worker; CHECK: movl 76(%esp), [[REGISTER:%[a-z]+]] 13*9880d681SAndroid Build Coastguard Worker; Overwrite return addresss 14*9880d681SAndroid Build Coastguard Worker; CHECK: movl [[EBX:%[a-z]+]], 76(%esp) 15*9880d681SAndroid Build Coastguard Worker; Move return address from temporary register (%ebp) to new stack location (60(%esp)) 16*9880d681SAndroid Build Coastguard Worker; CHECK: movl [[REGISTER]], 60(%esp) 17*9880d681SAndroid Build Coastguard Worker 18*9880d681SAndroid Build Coastguard Worker%tupl = type [9 x i32] 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Workerdeclare fastcc void @l297(i32 %r10, i32 %r9, i32 %r8, i32 %r7, i32 %r6, i32 %r5, i32 %r3, i32 %r2) noreturn nounwind 21*9880d681SAndroid Build Coastguard Workerdeclare fastcc void @l298(i32 %r10, i32 %r9, i32 %r4) noreturn nounwind 22*9880d681SAndroid Build Coastguard Worker 23*9880d681SAndroid Build Coastguard Workerdefine fastcc void @l186(%tupl* %r1) noreturn nounwind { 24*9880d681SAndroid Build Coastguard Workerentry: 25*9880d681SAndroid Build Coastguard Worker %ptr1 = getelementptr %tupl, %tupl* %r1, i32 0, i32 0 26*9880d681SAndroid Build Coastguard Worker %r2 = load i32, i32* %ptr1 27*9880d681SAndroid Build Coastguard Worker %ptr3 = getelementptr %tupl, %tupl* %r1, i32 0, i32 1 28*9880d681SAndroid Build Coastguard Worker %r3 = load i32, i32* %ptr3 29*9880d681SAndroid Build Coastguard Worker %ptr5 = getelementptr %tupl, %tupl* %r1, i32 0, i32 2 30*9880d681SAndroid Build Coastguard Worker %r4 = load i32, i32* %ptr5 31*9880d681SAndroid Build Coastguard Worker %ptr7 = getelementptr %tupl, %tupl* %r1, i32 0, i32 3 32*9880d681SAndroid Build Coastguard Worker %r5 = load i32, i32* %ptr7 33*9880d681SAndroid Build Coastguard Worker %ptr9 = getelementptr %tupl, %tupl* %r1, i32 0, i32 4 34*9880d681SAndroid Build Coastguard Worker %r6 = load i32, i32* %ptr9 35*9880d681SAndroid Build Coastguard Worker %ptr11 = getelementptr %tupl, %tupl* %r1, i32 0, i32 5 36*9880d681SAndroid Build Coastguard Worker %r7 = load i32, i32* %ptr11 37*9880d681SAndroid Build Coastguard Worker %ptr13 = getelementptr %tupl, %tupl* %r1, i32 0, i32 6 38*9880d681SAndroid Build Coastguard Worker %r8 = load i32, i32* %ptr13 39*9880d681SAndroid Build Coastguard Worker %ptr15 = getelementptr %tupl, %tupl* %r1, i32 0, i32 7 40*9880d681SAndroid Build Coastguard Worker %r9 = load i32, i32* %ptr15 41*9880d681SAndroid Build Coastguard Worker %ptr17 = getelementptr %tupl, %tupl* %r1, i32 0, i32 8 42*9880d681SAndroid Build Coastguard Worker %r10 = load i32, i32* %ptr17 43*9880d681SAndroid Build Coastguard Worker %cond = icmp eq i32 %r10, 3 44*9880d681SAndroid Build Coastguard Worker br i1 %cond, label %true, label %false 45*9880d681SAndroid Build Coastguard Worker 46*9880d681SAndroid Build Coastguard Workertrue: 47*9880d681SAndroid Build Coastguard Worker tail call fastcc void @l297(i32 %r10, i32 %r9, i32 %r8, i32 %r7, i32 %r6, i32 %r5, i32 %r3, i32 %r2) noreturn nounwind 48*9880d681SAndroid Build Coastguard Worker ret void 49*9880d681SAndroid Build Coastguard Worker 50*9880d681SAndroid Build Coastguard Workerfalse: 51*9880d681SAndroid Build Coastguard Worker tail call fastcc void @l298(i32 %r10, i32 %r9, i32 %r4) noreturn nounwind 52*9880d681SAndroid Build Coastguard Worker ret void 53*9880d681SAndroid Build Coastguard Worker} 54