test/CodeGen/AArch64/arm64-collect-loh-garbage-crash.ll

   1 ; RUN: llc -mtriple=arm64-apple-ios -O3 -aarch64-collect-loh -aarch64-collect-loh-bb-only=true -aarch64-collect-loh-pre-collect-register=false < %s -o - | FileCheck %s
   2 ; Check that the LOH analysis does not crash when the analysed chained
   3 ; contains instructions that are filtered out.
   4 ;
   5 ; Before the fix for <rdar://problem/16041712>, these cases were removed
   6 ; from the main container. Now, the deterministic container does not allow
   7 ; to remove arbitrary values, so we have to live with garbage values.
   8 ; <rdar://problem/16041712>
   9
  10 %"class.H4ISP::H4ISPDevice" = type { i32 (%"class.H4ISP::H4ISPDevice"*, i32, i8*, i8*)*, i8*, i32*, %"class.H4ISP::H4ISPCameraManager"* }
  11
  12 %"class.H4ISP::H4ISPCameraManager" = type opaque
  13
  14 declare i32 @_ZN5H4ISP11H4ISPDevice32ISP_SelectBestMIPIFrequencyIndexEjPj(%"class.H4ISP::H4ISPDevice"*)
  15
  16 @pH4ISPDevice = hidden global %"class.H4ISP::H4ISPDevice"* null, align 8
  17
  18 ; CHECK-LABEL: _foo:
  19 ; CHECK: ret
  20 ; CHECK-NOT: .loh AdrpLdrGotLdr
  21 define void @foo() {
  22 entry:
  23   br label %if.then83
  24 if.then83:                                        ; preds = %if.end81
  25   %tmp = load %"class.H4ISP::H4ISPDevice"*, %"class.H4ISP::H4ISPDevice"** @pH4ISPDevice, align 8
  26   %call84 = call i32 @_ZN5H4ISP11H4ISPDevice32ISP_SelectBestMIPIFrequencyIndexEjPj(%"class.H4ISP::H4ISPDevice"* %tmp) #19
  27   tail call void asm sideeffect "", "~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x27}"()
  28   %tmp2 = load %"class.H4ISP::H4ISPDevice"*, %"class.H4ISP::H4ISPDevice"** @pH4ISPDevice, align 8
  29   tail call void asm sideeffect "", "~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x28}"()
  30   %pCameraManager.i268 = getelementptr inbounds %"class.H4ISP::H4ISPDevice", %"class.H4ISP::H4ISPDevice"* %tmp2, i64 0, i32 3
  31   %tmp3 = load %"class.H4ISP::H4ISPCameraManager"*, %"class.H4ISP::H4ISPCameraManager"** %pCameraManager.i268, align 8
  32   %tobool.i269 = icmp eq %"class.H4ISP::H4ISPCameraManager"* %tmp3, null
  33   br i1 %tobool.i269, label %if.then83, label %end
  34 end:
  35   ret void
  36 }
  37