| Tim Northover | 00ed996 | 2014-03-29 10:18:08 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s | FileCheck %s |
| 2 | target 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: |
| Tim Northover | cfd6e66 | 2014-04-30 11:19:15 +0000 | [diff] [blame] | 10 | ; CHECK: sub sp, sp, #4095, lsl #12 |
| 11 | ; CHECK: sub sp, sp, #4095, lsl #12 |
| 12 | ; CHECK: sub sp, sp, #2, lsl #12 |
| Tim Northover | 00ed996 | 2014-03-29 10:18:08 +0000 | [diff] [blame] | 13 | define void @foo() nounwind ssp { |
| 14 | entry: |
| 15 | %buffer = alloca [33554432 x i8], align 1 |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 16 | %arraydecay = getelementptr inbounds [33554432 x i8], [33554432 x i8]* %buffer, i64 0, i64 0 |
| Tim Northover | 00ed996 | 2014-03-29 10:18:08 +0000 | [diff] [blame] | 17 | call void @doit(i8* %arraydecay) nounwind |
| 18 | ret void |
| 19 | } |
| 20 | |
| 21 | declare void @doit(i8*) |