File: stackmap-dynamic-alloca.ll

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llvm-toolchain-15 1%3A15.0.6-4
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; RUN: llc < %s -mtriple=arm64-linux-gnu | FileCheck %s

; When a function does a dynamic stack allocation, the function's stack size
; is reported as UINT64_MAX.

; CHECK-LABEL:  .section  .llvm_stackmaps
; CHECK-NEXT:  __LLVM_StackMaps:
; Header
; CHECK-NEXT:   .byte 3
; CHECK-NEXT:   .byte 0
; CHECK-NEXT:   .hword 0
; Num Functions
; CHECK-NEXT:   .word 1
; Num LargeConstants
; CHECK-NEXT:   .word 0
; Num Callsites
; CHECK-NEXT:   .word 1

; Functions and stack size
; CHECK-NEXT:   .xword f
; CHECK-NEXT:   .xword -1

define void @f(i32 %nelems) {
entry:
  %mem = alloca i32, i32 %nelems
  call void (i64, i32, ...) @llvm.experimental.stackmap(i64 0, i32 0, i32* %mem)
  ret void
}

declare void @llvm.experimental.stackmap(i64, i32, ...)