1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mtriple=thumbv7-netbsd-eabi -o - %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Workerdeclare void @bar() 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; ARM's frame lowering attempts to tack another callee-saved register onto the 5*9880d681SAndroid Build Coastguard Worker; list when it detects a potential misaligned VFP store. However, if there are 6*9880d681SAndroid Build Coastguard Worker; none available it used to just vpush anyway and misreport the location of the 7*9880d681SAndroid Build Coastguard Worker; registers in unwind info. Since there are benefits to aligned stores, it's 8*9880d681SAndroid Build Coastguard Worker; better to correct the code than the .cfi_offset directive. 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Workerdefine void @test_dpr_align(i8 %l, i8 %r) { 11*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_dpr_align: 12*9880d681SAndroid Build Coastguard Worker; CHECK: push.w {r4, r5, r6, r7, r8, r9, r10, r11, lr} 13*9880d681SAndroid Build Coastguard Worker; CHECK: .cfi_def_cfa_offset 36 14*9880d681SAndroid Build Coastguard Worker; CHECK: sub sp, #4 15*9880d681SAndroid Build Coastguard Worker; CHECK: .cfi_def_cfa_offset 40 16*9880d681SAndroid Build Coastguard Worker; CHECK: vpush {d8} 17*9880d681SAndroid Build Coastguard Worker; CHECK: .cfi_offset d8, -48 18*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub sp 19*9880d681SAndroid Build Coastguard Worker; [...] 20*9880d681SAndroid Build Coastguard Worker; CHECK: bl bar 21*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: add sp 22*9880d681SAndroid Build Coastguard Worker; CHECK: vpop {d8} 23*9880d681SAndroid Build Coastguard Worker; CHECK: add sp, #4 24*9880d681SAndroid Build Coastguard Worker; CHECK: pop.w {r4, r5, r6, r7, r8, r9, r10, r11, pc} 25*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{d8}"() 26*9880d681SAndroid Build Coastguard Worker call void @bar() 27*9880d681SAndroid Build Coastguard Worker ret void 28*9880d681SAndroid Build Coastguard Worker} 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Worker; The prologue (but not the epilogue) can be made more space efficient by 31*9880d681SAndroid Build Coastguard Worker; chucking an argument register into the list. Not worth it in general though, 32*9880d681SAndroid Build Coastguard Worker; "sub sp, #4" is likely faster. 33*9880d681SAndroid Build Coastguard Workerdefine void @test_dpr_align_tiny(i8 %l, i8 %r) minsize { 34*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_dpr_align_tiny: 35*9880d681SAndroid Build Coastguard Worker; CHECK: push.w {r3, r4, r5, r6, r7, r8, r9, r10, r11, lr} 36*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub sp 37*9880d681SAndroid Build Coastguard Worker; CHECK: vpush {d8} 38*9880d681SAndroid Build Coastguard Worker; CHECK: .cfi_offset d8, -48 39*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub sp 40*9880d681SAndroid Build Coastguard Worker; [...] 41*9880d681SAndroid Build Coastguard Worker; CHECK: bl bar 42*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: add sp 43*9880d681SAndroid Build Coastguard Worker; CHECK: vpop {d8} 44*9880d681SAndroid Build Coastguard Worker; CHECK: add sp, #4 45*9880d681SAndroid Build Coastguard Worker; CHECK: pop.w {r4, r5, r6, r7, r8, r9, r10, r11, pc} 46*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{d8}"() 47*9880d681SAndroid Build Coastguard Worker call void @bar() 48*9880d681SAndroid Build Coastguard Worker ret void 49*9880d681SAndroid Build Coastguard Worker} 50*9880d681SAndroid Build Coastguard Worker 51*9880d681SAndroid Build Coastguard Worker 52*9880d681SAndroid Build Coastguard Worker; However, we shouldn't do a 2-step align/adjust if there are no DPRs to be 53*9880d681SAndroid Build Coastguard Worker; saved. 54*9880d681SAndroid Build Coastguard Workerdefine void @test_nodpr_noalign(i8 %l, i8 %r) { 55*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_nodpr_noalign: 56*9880d681SAndroid Build Coastguard Worker; CHECK: push.w {r4, r5, r6, r7, r8, r9, r10, r11, lr} 57*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub sp 58*9880d681SAndroid Build Coastguard Worker; CHECK: sub sp, #12 59*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub sp 60*9880d681SAndroid Build Coastguard Worker; [...] 61*9880d681SAndroid Build Coastguard Worker; CHECK: bl bar 62*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: add sp 63*9880d681SAndroid Build Coastguard Worker; CHECK: add sp, #12 64*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: add sp 65*9880d681SAndroid Build Coastguard Worker; CHECK: pop.w {r4, r5, r6, r7, r8, r9, r10, r11, pc} 66*9880d681SAndroid Build Coastguard Worker alloca i64 67*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11}"() 68*9880d681SAndroid Build Coastguard Worker call void @bar() 69*9880d681SAndroid Build Coastguard Worker ret void 70*9880d681SAndroid Build Coastguard Worker} 71*9880d681SAndroid Build Coastguard Worker 72*9880d681SAndroid Build Coastguard Workerdefine void @test_frame_pointer_offset() minsize "no-frame-pointer-elim"="true" { 73*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: test_frame_pointer_offset: 74*9880d681SAndroid Build Coastguard Worker; CHECK: push.w {r3, r4, r5, r6, r7, r8, r9, r10, r11, lr} 75*9880d681SAndroid Build Coastguard Worker; CHECK: .cfi_def_cfa_offset 40 76*9880d681SAndroid Build Coastguard Worker; CHECK: add r7, sp, #16 77*9880d681SAndroid Build Coastguard Worker; CHECK: .cfi_def_cfa r7, 24 78*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: .cfi_def_cfa_offset 79*9880d681SAndroid Build Coastguard Worker call void asm sideeffect "", "~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{d8}"() 80*9880d681SAndroid Build Coastguard Worker call void @bar() 81*9880d681SAndroid Build Coastguard Worker ret void 82*9880d681SAndroid Build Coastguard Worker}