97 lines
2.8 KiB
LLVM
97 lines
2.8 KiB
LLVM
; RUN: llc -mtriple=thumbv7m-none-macho %s -o - -relocation-model=pic -disable-fp-elim | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NON-FAST
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; RUN: llc -mtriple=thumbv7m-none-macho -O0 %s -o - -relocation-model=pic -disable-fp-elim | FileCheck %s
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; RUN: llc -mtriple=thumbv7m-none-macho -filetype=obj %s -o /dev/null
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@var = external global i32
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define i32 @test_litpool() minsize {
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; CHECK-LABEL: test_litpool:
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%val = load i32, i32* @var
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ret i32 %val
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; Lit-pool entries need to produce a "$non_lazy_ptr" version of the symbol.
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; CHECK: LCPI0_0:
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; CHECK-NEXT: .long L_var$non_lazy_ptr-(LPC0_0+4)
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}
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define i32 @test_movw_movt() {
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; CHECK-LABEL: test_movw_movt:
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%val = load i32, i32* @var
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ret i32 %val
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; movw/movt should also address their symbols MachO-style
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; CHECK: movw [[RTMP:r[0-9]+]], :lower16:(L_var$non_lazy_ptr-(LPC1_0+4))
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; CHECK: movt [[RTMP]], :upper16:(L_var$non_lazy_ptr-(LPC1_0+4))
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; CHECK: LPC1_0:
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; CHECK: add [[RTMP]], pc
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}
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declare void @llvm.trap()
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define void @test_trap() {
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; CHECK-LABEL: test_trap:
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; Bare-metal MachO gets compiled on top of normal MachO toolchain which
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; understands trap natively.
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call void @llvm.trap()
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; CHECK: trap
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ret void
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}
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define i32 @test_frame_ptr() {
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; CHECK-LABEL: test_frame_ptr:
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call void @test_trap()
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; Frame pointer is r7.
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; CHECK: mov r7, sp
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ret i32 42
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}
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%big_arr = type [8 x i32]
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define void @test_two_areas(%big_arr* %addr) {
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; CHECK-LABEL: test_two_areas:
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%val = load %big_arr, %big_arr* %addr
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call void @test_trap()
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store %big_arr %val, %big_arr* %addr
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; This goes with the choice of r7 as FP (largely). FP and LR have to be stored
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; consecutively on the stack for the frame record to be valid, which means we
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; need the 2 register-save areas employed by iOS.
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; CHECK-NON-FAST: push {r4, r5, r6, r7, lr}
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; CHECK-NON-FAST: push.w {r8, r9, r10, r11}
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; ...
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; CHECK-NON-FAST: pop.w {r8, r9, r10, r11}
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; CHECK-NON-FAST: pop {r4, r5, r6, r7, pc}
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ret void
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}
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define void @test_tail_call() {
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; CHECK-LABEL: test_tail_call:
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tail call void @test_trap()
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; Tail calls should be available and use Thumb2 branch.
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; CHECK: b.w _test_trap
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ret void
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}
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define float @test_softfloat_calls(float %in) {
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; CHECK-LABEL: test_softfloat_calls:
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%sum = fadd float %in, %in
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; Soft-float calls should be GNU-style rather than RTABI and should not be the
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; *vfp variants used for ARMv6 iOS.
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; CHECK: bl ___addsf3{{$}}
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ret float %sum
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}
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; Even bare-metal PIC needs GOT-like behaviour, in principle. Depends a bit on
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; the use-case of course, but LLVM doesn't know what that is.
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; CHECK: non_lazy_symbol_pointers
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; CHECK: L_var$non_lazy_ptr:
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; CHECK-NEXT: .indirect_symbol _var
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; All MachO objects should have this to give the linker leeway in removing
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; dead code.
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; CHECK: .subsections_via_symbols
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