File: load-after-non-willreturn-call.ll

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llvm-toolchain-16 1%3A16.0.6-15~deb12u1
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
; RUN: opt -S -passes=argpromotion < %s | FileCheck %s

declare void @may_not_return()

; The argument cannot be promoted, as we do not know whether the load can be
; speculatively executed.

define internal i32 @callee(ptr %p) {
; CHECK-LABEL: define {{[^@]+}}@callee
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT:    call void @may_not_return()
; CHECK-NEXT:    [[X:%.*]] = load i32, ptr [[P]], align 4
; CHECK-NEXT:    ret i32 [[X]]
;
  call void @may_not_return() readnone
  %x = load i32, ptr %p
  ret i32 %x
}

define void @caller(ptr %p) {
; CHECK-LABEL: define {{[^@]+}}@caller
; CHECK-SAME: (ptr [[P:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @callee(ptr [[P]])
; CHECK-NEXT:    ret void
;
  call i32 @callee(ptr %p)
  ret void
}