1; RUN: opt < %s -argpromotion -S | FileCheck %s
2; RUN: opt < %s -passes=argpromotion -S | FileCheck %s
3
4; Unused arguments from variadic functions cannot be eliminated as that changes
5; their classiciation according to the SysV amd64 ABI. Clang and other frontends
6; bake in the classification when they use things like byval, as in this test.
7
8target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
9target triple = "x86_64-unknown-linux-gnu"
10
11%struct.tt0 = type { i64, i64 }
12%struct.__va_list_tag = type { i32, i32, i8*, i8* }
13
14@t45 = internal global %struct.tt0 { i64 1335139741, i64 438042995 }, align 8
15
16; Function Attrs: nounwind uwtable
17define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 {
18entry:
19  tail call void (i8*, i8*, i8*, i8*, i8*, ...) @callee_t0f(i8* undef, i8* undef, i8* undef, i8* undef, i8* undef, %struct.tt0* byval align 8 @t45)
20  ret i32 0
21}
22
23; Function Attrs: nounwind uwtable
24define internal void @callee_t0f(i8* nocapture readnone %tp13, i8* nocapture readnone %tp14, i8* nocapture readnone %tp15, i8* nocapture readnone %tp16, i8* nocapture readnone %tp17, ...) {
25entry:
26  ret void
27}
28
29; CHECK-LABEL: define internal void @callee_t0f(i8* nocapture readnone %tp13, i8* nocapture readnone %tp14, i8* nocapture readnone %tp15, i8* nocapture readnone %tp16, i8* nocapture readnone %tp17, ...)
30