1 ; RUN: llc < %s | FileCheck %s 2 3 ; Make sure we check that forwarded memory arguments are not modified when tail 4 ; calling. inalloca and copy arg elimination make argument slots mutable. 5 6 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 7 target triple = "i386-pc-windows-msvc19.0.24215" 8 9 declare x86_stdcallcc void @tail_std(i32) 10 declare void @capture(i32*) 11 12 define x86_thiscallcc void @inalloca(i32* %this, i32* inalloca %args) { 13 entry: 14 %val = load i32, i32* %args 15 store i32 0, i32* %args 16 tail call x86_stdcallcc void @tail_std(i32 %val) 17 ret void 18 } 19 20 ; CHECK-LABEL: _inalloca: # @inalloca 21 ; CHECK: movl 4(%esp), %[[reg:[^ ]*]] 22 ; CHECK: movl $0, 4(%esp) 23 ; CHECK: pushl %[[reg]] 24 ; CHECK: calll _tail_std@4 25 ; CHECK: retl $4 26 27 define x86_stdcallcc void @copy_elide(i32 %arg) { 28 entry: 29 %arg.ptr = alloca i32 30 store i32 %arg, i32* %arg.ptr 31 call void @capture(i32* %arg.ptr) 32 tail call x86_stdcallcc void @tail_std(i32 %arg) 33 ret void 34 } 35 36 ; CHECK-LABEL: _copy_elide@4: # @copy_elide 37 ; CHECK: leal {{[0-9]+}}(%esp), %[[reg:[^ ]*]] 38 ; CHECK: pushl %[[reg]] 39 ; CHECK: calll _capture 40 ; ... 41 ; CHECK: calll _tail_std@4 42 ; CHECK: retl $4 43
