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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target triple = "nvptx64"
declare void @user(ptr)
declare ptr @malloc(i64) allockind("alloc,uninitialized") "alloc-family"="malloc" allocsize(0)
declare void @free(ptr) allockind("free") "alloc-family"="malloc"
; Ensure the nvptx backend states malloc & free are a thing so we can recognize
; so we will optimize them properly. In the test below the malloc-free chain is
; useless and we can remove it *if* we know about malloc & free.
define void @malloc_then_free_not_needed() {
; CHECK-LABEL: @malloc_then_free_not_needed(
; CHECK-NEXT: ret void
;
%a = call ptr @malloc(i64 4)
store i8 0, ptr %a
call void @free(ptr %a)
ret void
}
define void @malloc_then_free_needed() {
; CHECK-LABEL: @malloc_then_free_needed(
; CHECK-NEXT: [[A:%.*]] = call dereferenceable_or_null(4) ptr @malloc(i64 4)
; CHECK-NEXT: call void @user(ptr [[A]])
; CHECK-NEXT: call void @free(ptr [[A]])
; CHECK-NEXT: ret void
;
%a = call ptr @malloc(i64 4)
call void @user(ptr %a)
call void @free(ptr %a)
ret void
}
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