[ARM][test] Improve stack-protector tests

llvm/test/LTO/ARM/ssp-static-reloc.ll is more about using the static
relocation model with "PIC Level" and unrelated to the LTO infrastructure.
Move the test. Update stack_guard_remat.ll to clearly test "PIC Level"
with the relevant relocation models.

Author: MaskRay

llvm/test/CodeGen/ARM/stack-guard-elf.ll

@@ -0,0 +1,41 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
+; RUN: llc -relocation-model=static < %s | FileCheck %s
+
+target triple = "armv7a-linux-gnueabi"
+
+define i32 @test1() #0 {
+; CHECK-LABEL: test1:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    push {r11, lr}
+; CHECK-NEXT:    sub sp, sp, #8
+; CHECK-NEXT:    sub sp, sp, #1024
+; CHECK-NEXT:    movw r0, :lower16:__stack_chk_guard
+; CHECK-NEXT:    movt r0, :upper16:__stack_chk_guard
+; CHECK-NEXT:    ldr r0, [r0]
+; CHECK-NEXT:    ldr r0, [r0]
+; CHECK-NEXT:    str r0, [sp, #1028]
+; CHECK-NEXT:    add r0, sp, #4
+; CHECK-NEXT:    bl foo
+; CHECK-NEXT:    movw r1, :lower16:__stack_chk_guard
+; CHECK-NEXT:    ldr r0, [sp, #1028]
+; CHECK-NEXT:    movt r1, :upper16:__stack_chk_guard
+; CHECK-NEXT:    ldr r1, [r1]
+; CHECK-NEXT:    ldr r1, [r1]
+; CHECK-NEXT:    cmp r1, r0
+; CHECK-NEXT:    moveq r0, #0
+; CHECK-NEXT:    addeq sp, sp, #8
+; CHECK-NEXT:    addeq sp, sp, #1024
+; CHECK-NEXT:    popeq {r11, pc}
+; CHECK-NEXT:  .LBB0_1:
+; CHECK-NEXT:    bl __stack_chk_fail
+  %a1 = alloca [256 x i32], align 4
+  call void @foo(ptr %a1) #3
+  ret i32 0
+}
+
+declare void @foo(ptr)
+
+attributes #0 = { nounwind sspstrong }
+
+!llvm.module.flags = !{!0}
+!0 = !{i32 8, !"PIC Level", i32 2}

llvm/test/CodeGen/ARM/stack_guard_remat.ll

@@ -1,9 +1,11 @@
-; RUN: llc < %s -mtriple=arm-apple-ios -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC
-; RUN: llc < %s -mtriple=arm-apple-ios -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=NO-PIC -check-prefix=STATIC
-; RUN: llc < %s -mtriple=arm-apple-ios -relocation-model=dynamic-no-pic -no-integrated-as | FileCheck %s  -check-prefix=NO-PIC -check-prefix=DYNAMIC-NO-PIC
-; RUN: llc < %s -mtriple=armv7-apple-ios -mcpu=cortex-a8 -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC-V7
-; RUN: llc < %s -mtriple=armv7-apple-ios -mcpu=cortex-a8 -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=STATIC-V7
-; RUN: llc < %s -mtriple=armv7-apple-ios -mcpu=cortex-a8 -relocation-model=dynamic-no-pic -no-integrated-as | FileCheck %s -check-prefix=DYNAMIC-NO-PIC-V7
+; RUN: rm -rf %t && split-file %s %t && cd %t
+; RUN: cat main.ll pic-flag.ll > pic.ll
+; RUN: llc < pic.ll -mtriple=arm-apple-ios -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC
+; RUN: llc < main.ll -mtriple=arm-apple-ios -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=NO-PIC -check-prefix=STATIC
+; RUN: llc < main.ll -mtriple=arm-apple-ios -relocation-model=dynamic-no-pic -no-integrated-as | FileCheck %s -check-prefixes=NO-PIC,DYNAMIC-NO-PIC
+; RUN: llc < pic.ll -mtriple=armv7-apple-ios -mcpu=cortex-a8 -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC-V7
+; RUN: llc < main.ll -mtriple=armv7-apple-ios -mcpu=cortex-a8 -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=STATIC-V7
+; RUN: llc < main.ll -mtriple=armv7-apple-ios -mcpu=cortex-a8 -relocation-model=dynamic-no-pic -no-integrated-as | FileCheck %s -check-prefix=DYNAMIC-NO-PIC-V7
 
 ;PIC:   foo2
 ;PIC:   ldr [[R0:r[0-9]+]], [[LABEL0:LCPI[0-9_]+]]
@@ -47,6 +49,7 @@
 ;DYNAMIC-NO-PIC-V7: L___stack_chk_guard$non_lazy_ptr:
 ;DYNAMIC-NO-PIC-V7:   .indirect_symbol        ___stack_chk_guard
 
+;--- main.ll
 ; Function Attrs: nounwind ssp
 define i32 @test_stack_guard_remat() #0 {
   %a1 = alloca [256 x i32], align 4
@@ -67,5 +70,6 @@ declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
 
 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" }
 
+;--- pic-flag.ll
 !llvm.module.flags = !{!0}
 !0 = !{i32 7, !"PIC Level", i32 2}