1 ; RUN: llc -mtriple=thumbv7m-none-macho %s -o - -relocation-model=pic -disable-fp-elim | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NON-FAST 2 ; RUN: llc -mtriple=thumbv7m-none-macho -O0 %s -o - -relocation-model=pic -disable-fp-elim | FileCheck %s 3 ; RUN: llc -mtriple=thumbv7m-none-macho -filetype=obj %s -o /dev/null 4 5 ; Bare-metal should probably "declare" segments just like normal MachO 6 ; CHECK: __picsymbolstub4 7 ; CHECK: __StaticInit 8 ; CHECK: __text 9 10 @var = external global i32 11 12 define i32 @test_litpool() minsize { 13 ; CHECK-LABEL: test_litpool: 14 %val = load i32* @var 15 ret i32 %val 16 17 ; Lit-pool entries need to produce a "$non_lazy_ptr" version of the symbol. 18 ; CHECK: LCPI0_0: 19 ; CHECK-NEXT: .long L_var$non_lazy_ptr-(LPC0_0+4) 20 } 21 22 define i32 @test_movw_movt() { 23 ; CHECK-LABEL: test_movw_movt: 24 %val = load i32* @var 25 ret i32 %val 26 27 ; movw/movt should also address their symbols MachO-style 28 ; CHECK: movw [[RTMP:r[0-9]+]], :lower16:(L_var$non_lazy_ptr-(LPC1_0+4)) 29 ; CHECK: movt [[RTMP]], :upper16:(L_var$non_lazy_ptr-(LPC1_0+4)) 30 ; CHECK: LPC1_0: 31 ; CHECK: add [[RTMP]], pc 32 } 33 34 declare void @llvm.trap() 35 36 define void @test_trap() { 37 ; CHECK-LABEL: test_trap: 38 39 ; Bare-metal MachO gets compiled on top of normal MachO toolchain which 40 ; understands trap natively. 41 call void @llvm.trap() 42 ; CHECK: trap 43 44 ret void 45 } 46 47 define i32 @test_frame_ptr() { 48 ; CHECK-LABEL: test_frame_ptr: 49 call void @test_trap() 50 51 ; Frame pointer is r11. 52 ; CHECK: mov r11, sp 53 ret i32 42 54 } 55 56 %big_arr = type [8 x i32] 57 define void @test_two_areas(%big_arr* %addr) { 58 ; CHECK-LABEL: test_two_areas: 59 %val = load %big_arr* %addr 60 call void @test_trap() 61 store %big_arr %val, %big_arr* %addr 62 63 ; This goes with the choice of r7 as FP (largely). FP and LR have to be stored 64 ; consecutively on the stack for the frame record to be valid, which means we 65 ; need the 2 register-save areas employed by iOS. 66 ; CHECK-NON-FAST: push.w {r4, r5, r6, r7, r8, r9, r10, r11, lr} 67 ; ... 68 ; CHECK-NON-FAST: pop.w {r4, r5, r6, r7, r8, r9, r10, r11, pc} 69 ret void 70 } 71 72 define void @test_tail_call() { 73 ; CHECK-LABEL: test_tail_call: 74 tail call void @test_trap() 75 76 ; Tail calls should be available and use Thumb2 branch. 77 ; CHECK: b.w _test_trap 78 ret void 79 } 80 81 define float @test_softfloat_calls(float %in) { 82 ; CHECK-LABEL: test_softfloat_calls: 83 %sum = fadd float %in, %in 84 85 ; Soft-float calls should be GNU-style rather than RTABI and should not be the 86 ; *vfp variants used for ARMv6 iOS. 87 ; CHECK: blx ___addsf3{{$}} 88 ret float %sum 89 } 90 91 ; Even bare-metal PIC needs GOT-like behaviour, in principle. Depends a bit on 92 ; the use-case of course, but LLVM doesn't know what that is. 93 ; CHECK: non_lazy_symbol_pointers 94 ; CHECK: L_var$non_lazy_ptr: 95 ; CHECK-NEXT: .indirect_symbol _var 96 97 ; All MachO objects should have this to give the linker leeway in removing 98 ; dead code. 99 ; CHECK: .subsections_via_symbols 100
