File: dynamic-alloca.ll

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llvm-toolchain-19 1%3A19.1.7-3~deb12u1
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; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -passes=safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -passes=safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s

@.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1

; Variable sized alloca
;  safestack attribute
; Requires protector.
define void @foo(i32 %n) nounwind uwtable safestack {
entry:
  ; CHECK: %[[SP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
  %n.addr = alloca i32, align 4
  %a = alloca ptr, align 8
  store i32 %n, ptr %n.addr, align 4
  %0 = load i32, ptr %n.addr, align 4
  %conv = sext i32 %0 to i64
  %1 = alloca i8, i64 %conv
  store ptr %1, ptr %a, align 8
  ; CHECK: store ptr %[[SP:.*]], ptr @__safestack_unsafe_stack_ptr
  ret void
}