llvm/test/CodeGen/Thumb/stack_guard_remat.ll

   1 ; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC
   2 ; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=NO-PIC  -check-prefix=STATIC
   3 ; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=dynamic-no-pic -no-integrated-as | FileCheck %s  -check-prefix=NO-PIC -check-prefix=DYNAMIC-NO-PIC
   4
   5 ;PIC:        foo2
   6 ;PIC:        add [[SAVED_GUARD:r[0-9]+]], sp, #904
   7 ;PIC-NEXT:   ldr [[SAVED_GUARD]], [[[SAVED_GUARD]], #124]
   8 ;PIC-NEXT:   ldr [[ORIGINAL_GUARD:r[0-9]+]], [[ORIGINAL_GUARD_LABEL:LCPI[0-9_]+]]
   9 ;PIC-NEXT: [[LABEL1:LPC[0-9_]+]]:
  10 ;PIC-NEXT:   add [[ORIGINAL_GUARD]], pc
  11 ;PIC-NEXT:   ldr [[ORIGINAL_GUARD]], [[[ORIGINAL_GUARD]]]
  12 ;PIC-NEXT:   ldr [[ORIGINAL_GUARD]], [[[ORIGINAL_GUARD]]]
  13 ;PIC-NEXT:   cmp [[ORIGINAL_GUARD]], [[SAVED_GUARD]]
  14
  15 ;PIC:      [[ORIGINAL_GUARD_LABEL]]:
  16 ;PIC-NEXT:   .long L___stack_chk_guard$non_lazy_ptr-([[LABEL1]]+4)
  17
  18 ;NO-PIC:   foo2
  19 ;NO-PIC:                add [[SAVED_GUARD:r[0-9]+]], sp, #904
  20 ;NO-PIC-NEXT:           ldr [[SAVED_GUARD]], [[[SAVED_GUARD]], #124]
  21 ;NO-PIC-NEXT:           ldr [[ORIGINAL_GUARD:r[0-9]+]], [[ORIGINAL_GUARD_LABEL:LCPI[0-9_]+]]
  22 ;NO-PIC-NOT: LPC
  23 ;NO-PIC-NEXT:           ldr [[ORIGINAL_GUARD]], [[[ORIGINAL_GUARD]]]
  24 ;DYNAMIC-NO-PIC-NEXT:   ldr [[ORIGINAL_GUARD]], [[[ORIGINAL_GUARD]]]
  25 ;NO-PIC-NEXT:           cmp [[ORIGINAL_GUARD]], [[SAVED_GUARD]]
  26
  27 ;STATIC:      [[ORIGINAL_GUARD_LABEL]]:
  28 ;STATIC-NEXT:   .long ___stack_chk_guard
  29
  30 ;DYNAMIC-NO-PIC:      [[ORIGINAL_GUARD_LABEL]]:
  31 ;DYNAMIC-NO-PIC-NEXT:   .long L___stack_chk_guard$non_lazy_ptr
  32
  33 ; Function Attrs: nounwind ssp
  34 define i32 @test_stack_guard_remat() #0 {
  35   %a1 = alloca [256 x i32], align 4
  36   call void @llvm.lifetime.start.p0(i64 1024, ptr %a1)
  37   call void @foo3(ptr %a1) #3
  38   call void asm sideeffect "foo2", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{sp},~{lr}"()
  39   call void @llvm.lifetime.end.p0(i64 1024, ptr %a1)
  40   ret i32 0
  41 }
  42
  43 ; Function Attrs: nounwind
  44 declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
  45
  46 declare void @foo3(ptr)
  47
  48 ; Function Attrs: nounwind
  49 declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
  50
  51 attributes #0 = { nounwind ssp "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
  52
  53 !llvm.module.flags = !{!0}
  54 !0 = !{i32 7, !"PIC Level", i32 2}