Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/Thumb2/frame-pointer.ll

@@ -1,152 +0,0 @@
-; RUN: llc -mtriple=thumbv7m-none-eabi -o - %s | FileCheck %s
-
-declare void @foo()
-
-; Leaf function, no frame so no need for a frame pointer.
-define void @leaf() {
-; CHECK-LABEL: leaf:
-; CHECK-NOT: push
-; CHECK-NOT: sp
-; CHECK-NOT: pop
-; CHECK: bx lr
-  ret void
-}
-
-; Leaf function, frame pointer is requested but we don't need any stack frame,
-; so don't create a frame pointer.
-define void @leaf_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: leaf_nofpelim:
-; CHECK-NOT: push
-; CHECK-NOT: sp
-; CHECK-NOT: pop
-; CHECK: bx lr
-  ret void
-}
-
-; Leaf function, frame pointer is requested and we need a stack frame, so we
-; need to use a frame pointer.
-define void @leaf_lowreg_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: leaf_lowreg_nofpelim:
-; CHECK: push {r4, r6, r7, lr}
-; CHECK: add r7, sp, #8
-; CHECK: pop {r4, r6, r7, pc}
-  call void asm sideeffect "", "~{r4}" ()
-  ret void
-}
-
-; Leaf function, frame pointer is requested and we need a stack frame, so we
-; need to use a frame pointer. A high register is pushed to the stack, so we
-; must use two push/pop instructions to ensure that fp and sp are adjacent on
-; the stack.
-define void @leaf_highreg_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: leaf_highreg_nofpelim:
-; CHECK: push {r6, r7, lr}
-; CHECK: add r7, sp, #4
-; CHECK: str r8, [sp, #-4]!
-; CHECK: ldr r8, [sp], #4
-; CHECK: pop {r6, r7, pc}
-  call void asm sideeffect "", "~{r8}" ()
-  ret void
-}
-
-; Leaf function, frame pointer requested for non-leaf functions only, so no
-; need for a stack frame.
-define void @leaf_nononleaffpelim() "no-frame-pointer-elim-non-leaf" {
-; CHECK-LABEL: leaf_nononleaffpelim:
-; CHECK-NOT: push
-; CHECK-NOT: sp
-; CHECK-NOT: pop
-; CHECK: bx lr
-  ret void
-}
-
-; Has a call, but still no need for a frame pointer.
-define void @call() {
-; CHECK-LABEL: call:
-; CHECK: push {[[DUMMYREG:r[0-9]+]], lr}
-; CHECK-NOT: sp
-; CHECK: bl foo
-; CHECK: pop {[[DUMMYREG]], pc}
-  call void @foo()
-  ret void
-}
-
-; Has a call, and frame pointer requested.
-define void @call_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: call_nofpelim:
-; CHECK: push {r7, lr}
-; CHECK: mov r7, sp
-; CHECK: bl foo
-; CHECK: pop {r7, pc}
-  call void @foo()
-  ret void
-}
-
-; Has a call, and frame pointer requested for non-leaf function.
-define void @call_nononleaffpelim() "no-frame-pointer-elim-non-leaf" {
-; CHECK-LABEL: call_nononleaffpelim:
-; CHECK: push {r7, lr}
-; CHECK: mov r7, sp
-; CHECK: bl foo
-; CHECK: pop {r7, pc}
-  call void @foo()
-  ret void
-}
-
-; Has a high register clobbered, no need for a frame pointer.
-define void @highreg() {
-; CHECK-LABEL: highreg:
-; CHECK: push.w {r8, lr}
-; CHECK-NOT: sp
-; CHECK: bl foo
-; CHECK: pop.w {r8, pc}
-  call void asm sideeffect "", "~{r8}" ()
-  call void @foo()
-  ret void
-}
-
-; Has a high register clobbered, frame pointer requested. We need to split the
-; push into two, to ensure that r7 and sp are adjacent on the stack.
-define void @highreg_nofpelim() "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: highreg_nofpelim:
-; CHECK: push {[[DUMMYREG:r[0-9]+]], r7, lr}
-; CHECK: add r7, sp, #4
-; CHECK: str r8, [sp, #-4]!
-; CHECK: bl foo
-; CHECK: ldr r8, [sp], #4
-; CHECK: pop {[[DUMMYREG]], r7, pc}
-  call void asm sideeffect "", "~{r8}" ()
-  call void @foo()
-  ret void
-}
-
-; Has a high register clobbered, frame required due to variable-sized alloca.
-; We need a frame pointer to correctly restore the stack, but don't need to
-; split the push/pop here, because the frame pointer not required by the ABI.
-define void @highreg_alloca(i32 %a) {
-; CHECK-LABEL: highreg_alloca:
-; CHECK: push.w {[[SOMEREGS:.*]], r7, r8, lr}
-; CHECK: add r7, sp, #{{[0-9]+}}
-; CHECK: bl foo
-; CHECK: pop.w {[[SOMEREGS]], r7, r8, pc}
-  %alloca = alloca i32, i32 %a, align 4
-  call void @foo()
-  call void asm sideeffect "", "~{r8}" ()
-  ret void
-}
-
-; Has a high register clobbered, frame required due to both variable-sized
-; alloca and ABI. We do need to split the push/pop here.
-define void @highreg_alloca_nofpelim(i32 %a) "no-frame-pointer-elim"="true" {
-; CHECK-LABEL: highreg_alloca_nofpelim:
-; CHECK: push {[[SOMEREGS:.*]], r7, lr}
-; CHECK: add r7, sp, #{{[0-9]+}}
-; CHECK: str r8, [sp, #-4]!
-; CHECK: bl foo
-; CHECK: ldr r8, [sp], #4
-; CHECK: pop {[[SOMEREGS]], r7, pc}
-  %alloca = alloca i32, i32 %a, align 4
-  call void @foo()
-  call void asm sideeffect "", "~{r8}" ()
-  ret void
-}