xref: /llvm-project/llvm/test/Transforms/ArgumentPromotion/dead-gep-no-promotion.ll (revision bcbc6151640f53e9d78392c66de9760c664d8b1d)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
2; RUN: opt -passes=argpromotion -S %s | FileCheck %s
3
4@glob = external global ptr
5
6; No arguments in @callee can be promoted, but it contains a dead GEP. Make
7; sure it is not removed, as we do not perform any promotion.
8define i32 @caller(ptr %ptr) {
9; CHECK-LABEL: define {{[^@]+}}@caller
10; CHECK-SAME: (ptr [[PTR:%.*]]) {
11; CHECK-NEXT:    call void @callee(ptr [[PTR]], ptr [[PTR]], ptr [[PTR]])
12; CHECK-NEXT:    ret i32 0
13;
14  call void @callee(ptr %ptr, ptr %ptr, ptr %ptr)
15  ret i32 0
16}
17
18define internal void @callee(ptr %arg, ptr %arg1, ptr %arg2) {
19; CHECK-LABEL: define {{[^@]+}}@callee
20; CHECK-SAME: (ptr [[ARG:%.*]], ptr [[ARG1:%.*]], ptr [[ARG2:%.*]]) {
21; CHECK-NEXT:    call void @external_fn(ptr [[ARG]], ptr [[ARG1]])
22; CHECK-NEXT:    [[DEAD_GEP:%.*]] = getelementptr inbounds i32, ptr [[ARG1]], i32 17
23; CHECK-NEXT:    store ptr [[ARG2]], ptr @glob, align 8
24; CHECK-NEXT:    ret void
25;
26  call void @external_fn(ptr %arg, ptr %arg1)
27  %dead.gep = getelementptr inbounds i32, ptr %arg1, i32 17
28  store ptr %arg2, ptr @glob, align 8
29  ret  void
30}
31
32declare void @external_fn(ptr, ptr)
33