1; RUN: llc < %s | FileCheck %s 2target triple = "arm64-apple-macosx10" 3 4; Check that big stacks are generated correctly. 5; Currently, this is done by a sequence of sub instructions, 6; which can encode immediate with a 12 bits mask an optionally 7; shift left (up to 12). I.e., 16773120 is the biggest value. 8; <rdar://12513931> 9; CHECK-LABEL: foo: 10; CHECK: sub sp, sp, #4095, lsl #12 11; CHECK: sub sp, sp, #4095, lsl #12 12; CHECK: sub sp, sp, #2, lsl #12 13define void @foo() nounwind ssp { 14entry: 15 %buffer = alloca [33554432 x i8], align 1 16 call void @doit(ptr %buffer) nounwind 17 ret void 18} 19 20declare void @doit(ptr) 21