From d72d8c83a3484a4ecb02ca7266a58985d51fc0bb Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@apple.com>
Date: Fri, 25 Jul 2014 19:47:46 +0000
Subject: [PATCH] [stack protector] Add test cases for thumb and thumb2.

<rdar://problem/12475629>

llvm-svn: 213970
---
 test/CodeGen/Thumb/stack_guard_remat.ll  | 41 ++++++++++++++++++++++++
 test/CodeGen/Thumb2/stack_guard_remat.ll | 37 +++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 test/CodeGen/Thumb/stack_guard_remat.ll
 create mode 100644 test/CodeGen/Thumb2/stack_guard_remat.ll

diff --git a/test/CodeGen/Thumb/stack_guard_remat.ll b/test/CodeGen/Thumb/stack_guard_remat.ll
new file mode 100644
index 00000000000..2bb690c06c7
--- /dev/null
+++ b/test/CodeGen/Thumb/stack_guard_remat.ll
@@ -0,0 +1,41 @@
+; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC
+; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=STATIC
+
+;PIC:   foo2
+;PIC:   ldr [[R0:r[0-9]+]], [[LABEL0:LCPI[0-9_]+]]
+;PIC: [[LABEL1:LPC[0-9_]+]]:
+;PIC:   add [[R0]], pc
+;PIC:   ldr [[R1:r[0-9]+]], {{\[}}[[R0]]{{\]}}
+;PIC:   ldr [[R1:r[0-9]+]], {{\[}}[[R1]]{{\]}}
+
+;PIC:      [[LABEL0]]:
+;PIC-NEXT:   .long L___stack_chk_guard$non_lazy_ptr-([[LABEL1]]+4)
+
+;STATIC:   foo2
+;STATIC:   ldr [[R0:r[0-9]+]], [[LABEL0:LCPI[0-9_]+]]
+;STATIC:   ldr {{r[0-9]+}}, {{\[}}[[R0]]{{\]}}
+
+;STATIC:      [[LABEL0]]:
+;STATIC-NEXT:   .long ___stack_chk_guard
+
+; Function Attrs: nounwind ssp
+define i32 @test_stack_guard_remat() #0 {
+  %a1 = alloca [256 x i32], align 4
+  %1 = bitcast [256 x i32]* %a1 to i8*
+  call void @llvm.lifetime.start(i64 1024, i8* %1)
+  %2 = getelementptr inbounds [256 x i32]* %a1, i32 0, i32 0
+  call void @foo3(i32* %2) #3
+  call void asm sideeffect "foo2", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{sp},~{lr}"()
+  call void @llvm.lifetime.end(i64 1024, i8* %1)
+  ret i32 0
+}
+
+; Function Attrs: nounwind
+declare void @llvm.lifetime.start(i64, i8* nocapture)
+
+declare void @foo3(i32*)
+
+; Function Attrs: nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture)
+
+attributes #0 = { nounwind ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
diff --git a/test/CodeGen/Thumb2/stack_guard_remat.ll b/test/CodeGen/Thumb2/stack_guard_remat.ll
new file mode 100644
index 00000000000..a0982be5f56
--- /dev/null
+++ b/test/CodeGen/Thumb2/stack_guard_remat.ll
@@ -0,0 +1,37 @@
+; RUN: llc < %s -mtriple=thumbv7-apple-ios -relocation-model=pic -no-integrated-as | FileCheck %s -check-prefix=PIC
+; RUN: llc < %s -mtriple=thumbv7-apple-ios -relocation-model=static -no-integrated-as | FileCheck %s -check-prefix=STATIC
+
+;PIC:   foo2
+;PIC:   movw  [[R0:r[0-9]+]], :lower16:(L___stack_chk_guard$non_lazy_ptr-([[LABEL0:LPC[0-9_]+]]+4))
+;PIC:   movt  [[R0]], :upper16:(L___stack_chk_guard$non_lazy_ptr-([[LABEL0]]+4))
+;PIC: [[LABEL0]]:
+;PIC:   add [[R0]], pc
+;PIC:   ldr [[R1:r[0-9]+]], {{\[}}[[R0]]{{\]}}
+;PIC:   ldr {{r[0-9]+}}, {{\[}}[[R1]]{{\]}}
+
+;STATIC:   foo2
+;STATIC:   movw  [[R0:r[0-9]+]], :lower16:___stack_chk_guard
+;STATIC:   movt  [[R0]], :upper16:___stack_chk_guard
+;STATIC:   ldr {{r[0-9]+}}, {{\[}}[[R0]]{{\]}}
+
+; Function Attrs: nounwind ssp
+define i32 @test_stack_guard_remat() #0 {
+  %a1 = alloca [256 x i32], align 4
+  %1 = bitcast [256 x i32]* %a1 to i8*
+  call void @llvm.lifetime.start(i64 1024, i8* %1)
+  %2 = getelementptr inbounds [256 x i32]* %a1, i32 0, i32 0
+  call void @foo3(i32* %2) #3
+  call void asm sideeffect "foo2", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{sp},~{lr}"()
+  call void @llvm.lifetime.end(i64 1024, i8* %1)
+  ret i32 0
+}
+
+; Function Attrs: nounwind
+declare void @llvm.lifetime.start(i64, i8* nocapture)
+
+declare void @foo3(i32*)
+
+; Function Attrs: nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture)
+
+attributes #0 = { nounwind ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }