forked from OSchip/llvm-project
43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
|
; RUN: llc < %s | FileCheck %s
|
||
|
|
|
||
|
|
; Make sure we check that forwarded memory arguments are not modified when tail
|
||
|
|
; calling. inalloca and copy arg elimination make argument slots mutable.
|
||
|
|
|
||
|
|
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
|
||
|
|
target triple = "i386-pc-windows-msvc19.0.24215"
|
||
|
|
|
||
|
|
declare x86_stdcallcc void @tail_std(i32)
|
||
|
|
declare void @capture(i32*)
|
||
|
|
|
||
|
|
define x86_thiscallcc void @inalloca(i32* %this, i32* inalloca %args) {
|
||
|
|
entry:
|
||
|
|
%val = load i32, i32* %args
|
||
|
|
store i32 0, i32* %args
|
||
|
|
tail call x86_stdcallcc void @tail_std(i32 %val)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: _inalloca: # @inalloca
|
||
|
|
; CHECK: movl 4(%esp), %[[reg:[^ ]*]]
|
||
|
|
; CHECK: movl $0, 4(%esp)
|
||
|
|
; CHECK: pushl %[[reg]]
|
||
|
|
; CHECK: calll _tail_std@4
|
||
|
|
; CHECK: retl $4
|
||
|
|
|
||
|
|
define x86_stdcallcc void @copy_elide(i32 %arg) {
|
||
|
|
entry:
|
||
|
|
%arg.ptr = alloca i32
|
||
|
|
store i32 %arg, i32* %arg.ptr
|
||
|
|
call void @capture(i32* %arg.ptr)
|
||
|
|
tail call x86_stdcallcc void @tail_std(i32 %arg)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK-LABEL: _copy_elide@4: # @copy_elide
|
||
|
|
; CHECK: leal {{[0-9]+}}(%esp), %[[reg:[^ ]*]]
|
||
|
|
; CHECK: pushl %[[reg]]
|
||
|
|
; CHECK: calll _capture
|
||
|
|
; ...
|
||
|
|
; CHECK: calll _tail_std@4
|
||
|
|
; CHECK: retl $4
|