xref: /llvm-project/llvm/test/Transforms/InstCombine/out-of-tree-allocator-optimizes-away.ll (revision 195362929cd79c0202f73bcbab9a09b8a1a3beaa) 
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -passes=instcombine %s | FileCheck %s
3
4define void @alloc_elides_test(i32 %data) {
5; CHECK-LABEL: @alloc_elides_test(
6; CHECK-NEXT:  start:
7; CHECK-NEXT:    ret void
8;
9start:
10  %alloc = call ptr @__rust_alloc(i64 4, i64 32)
11  store i32 0, ptr %alloc
12  %alloc2 = call ptr @__rust_realloc(ptr %alloc, i64 4, i64 32, i64 8)
13  store i32 1, ptr %alloc2
14  call void @__rust_dealloc(ptr %alloc2, i64 4, i64 32)
15  ret void
16}
17
18define void @alloc_elides_test_virtual(i32 %data, ptr %alloc, ptr %realloc, ptr %dealloc) {
19; CHECK-LABEL: @alloc_elides_test_virtual(
20; CHECK-NEXT:  start:
21; CHECK-NEXT:    ret void
22;
23start:
24  %a = call noalias ptr %alloc(i64 4, i64 allocalign 32) nounwind allocsize(0) allockind("alloc,uninitialized,aligned") "alloc-family"="__rust_alloc"
25  store i32 0, ptr %a
26  %a2 = call noalias ptr %realloc(ptr allocptr %a, i64 4, i64 allocalign 32, i64 8) nounwind allocsize(3) allockind("alloc,uninitialized,aligned") "alloc-family"="__rust_alloc"
27  store i32 1, ptr %a2
28  call void %dealloc(ptr allocptr %a2, i64 4, i64 32) nounwind allockind("free") "alloc-family"="__rust_alloc"
29  ret void
30}
31
32declare noalias ptr @__rust_alloc(i64, i64 allocalign) nounwind allocsize(0) allockind("alloc,uninitialized,aligned") "alloc-family"="__rust_alloc"
33
34declare noalias ptr @__rust_realloc(ptr allocptr, i64, i64 allocalign, i64) nounwind allocsize(3) allockind("alloc,uninitialized,aligned") "alloc-family"="__rust_alloc"
35
36declare void @__rust_dealloc(ptr allocptr, i64, i64) nounwind allockind("free") "alloc-family"="__rust_alloc"
37