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