mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 02:32:08 +00:00
05e353c4ed
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122937 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-win32 | FileCheck %s -check-prefix=WIN_X32
|
|
; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck %s -check-prefix=WIN_X64
|
|
; RUN: llc < %s -mtriple=i686-pc-mingw32 | FileCheck %s -check-prefix=MINGW_X32
|
|
; RUN: llc < %s -mtriple=x86_64-pc-mingw32 | FileCheck %s -check-prefix=MINGW_X64
|
|
; RUN: llc < %s -mtriple=i386-pc-linux | FileCheck %s -check-prefix=LINUX
|
|
|
|
; Windows and mingw require a prologue helper routine if more than 4096 bytes area
|
|
; allocated on the stack. Windows uses __chkstk and mingw uses __alloca. __alloca
|
|
; and the 32-bit version of __chkstk will probe the stack and adjust the stack pointer.
|
|
; The 64-bit version of __chkstk is only responsible for probing the stack. The 64-bit
|
|
; prologue is responsible for adjusting the stack pointer.
|
|
|
|
; Stack allocation >= 4096 bytes will require call to __chkstk in the Windows ABI.
|
|
define i32 @main4k() nounwind {
|
|
entry:
|
|
; WIN_X32: calll __chkstk
|
|
; WIN_X64: callq __chkstk
|
|
; MINGW_X32: calll __alloca
|
|
; MINGW_X64: callq __chkstk
|
|
; LINUX-NOT: call __chkstk
|
|
%array4096 = alloca [4096 x i8], align 16 ; <[4096 x i8]*> [#uses=0]
|
|
ret i32 0
|
|
}
|
|
|
|
; Make sure we don't call __chkstk or __alloca when we have less than a 4096 stack
|
|
; allocation.
|
|
define i32 @main128() nounwind {
|
|
entry:
|
|
; WIN_X32: # BB#0:
|
|
; WIN_X32-NOT: calll __chkstk
|
|
; WIN_X32: ret
|
|
|
|
; WIN_X64: # BB#0:
|
|
; WIN_X64-NOT: callq __chkstk
|
|
; WIN_X64: ret
|
|
|
|
; MINGW_X64: # BB#0:
|
|
; MINGW_X64-NOT: callq _alloca
|
|
; MINGW_X64: ret
|
|
|
|
; LINUX: # BB#0:
|
|
; LINUX-NOT: call __chkstk
|
|
; LINUX: ret
|
|
%array128 = alloca [128 x i8], align 16 ; <[128 x i8]*> [#uses=0]
|
|
ret i32 0
|
|
}
|