llvm-mirror/test/CodeGen/XCore/epilogue_prologue.ll

; RUN: llc < %s -march=xcore | FileCheck %s

; CHECK-LABEL: f1
; CHECK: stw lr, sp[0]
; CHECK: ldw lr, sp[0]
; CHECK-NEXT: retsp 0
define void @f1() nounwind {
entry:
  tail call void asm sideeffect "", "~{lr}"() nounwind
  ret void
}

; CHECK-LABEL: f3
; CHECK: entsp 2
; CHECK: stw [[REG:r[4-9]+]], sp[1]
; CHECK: mov [[REG]], r0
; CHECK: bl f2
; CHECK: mov r0, [[REG]]
; CHECK: ldw [[REG]], sp[1]
; CHECK: retsp 2
declare void @f2()
define i32 @f3(i32 %i) nounwind {
entry:
  call void @f2()
  ret i32 %i
}
[XCore] Fix handling of functions where only the LR is spilled. Previously we only checked if the LR required saving if the frame size was non zero. However because the caller reserves 1 word for the callee to use that doesn't count towards our frame size it is possible for the LR to need saving and for the frame size to be 0. We didn't hit when the LR needed saving because of a function calls because the 1 word of stack we must allocate for our callee means the frame size is always non zero in this case. However we can hit this case if the LR is clobbered in inline asm. llvm-svn: 181520 2013-05-09 18:43:42 +02:00			`; RUN: llc < %s -march=xcore \| FileCheck %s`

[XCore] Ensure implicit operands aren't lost on the return instruction. Patch by Robert Lytton. llvm-svn: 186500 2013-07-17 12:58:37 +02:00			`; CHECK-LABEL: f1`
[XCore] Fix handling of functions where only the LR is spilled. Previously we only checked if the LR required saving if the frame size was non zero. However because the caller reserves 1 word for the callee to use that doesn't count towards our frame size it is possible for the LR to need saving and for the frame size to be 0. We didn't hit when the LR needed saving because of a function calls because the 1 word of stack we must allocate for our callee means the frame size is always non zero in this case. However we can hit this case if the LR is clobbered in inline asm. llvm-svn: 181520 2013-05-09 18:43:42 +02:00			`; CHECK: stw lr, sp[0]`
			`; CHECK: ldw lr, sp[0]`
			`; CHECK-NEXT: retsp 0`
			`define void @f1() nounwind {`
			`entry:`
			`tail call void asm sideeffect "", "~{lr}"() nounwind`
			`ret void`
			`}`
[XCore] Ensure implicit operands aren't lost on the return instruction. Patch by Robert Lytton. llvm-svn: 186500 2013-07-17 12:58:37 +02:00
			`; CHECK-LABEL: f3`
			`; CHECK: entsp 2`
			`; CHECK: stw [[REG:r[4-9]+]], sp[1]`
			`; CHECK: mov [[REG]], r0`
			`; CHECK: bl f2`
			`; CHECK: mov r0, [[REG]]`
			`; CHECK: ldw [[REG]], sp[1]`
			`; CHECK: retsp 2`
			`declare void @f2()`
			`define i32 @f3(i32 %i) nounwind {`
			`entry:`
			`call void @f2()`
			`ret i32 %i`
			`}`