File: constant-gep-call.ll

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llvm-toolchain-21 1%3A21.1.6-3
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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

%struct.nest = type { %struct.pair, %struct.pair }
%struct.pair = type { i32, i32 }

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

; Nested structure, no arrays, no address-of expressions.
; Verify that the resulting gep-of-gep does not incorrectly trigger
; a safe stack protector.
; safestack attribute
; Requires no protector.
; CHECK-LABEL: @foo(
define void @foo() nounwind uwtable safestack {
entry:
  ; CHECK-NOT: __safestack_unsafe_stack_ptr
  %c = alloca %struct.nest, align 4
  %b = getelementptr inbounds %struct.nest, ptr %c, i32 0, i32 1
  %0 = load i32, ptr %b, align 4
  %call = call i32 (ptr, ...) @printf(ptr @.str, i32 %0)
  ret void
}

declare i32 @printf(ptr, ...)