1 ; RUN: llc -march=bpfel -mcpu=v4 -verify-machineinstrs -show-mc-encoding < %s | FileCheck %s
3 ; long foo(int a, int b, long c) {
4 ; a = __builtin_bswap16(a);
5 ; b = __builtin_bswap32(b);
6 ; c = __builtin_bswap64(c);
10 ; clang -target bpf -O2 -S -emit-llvm t.c
12 ; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
13 define dso_local i64 @foo(i32 noundef %a, i32 noundef %b, i64 noundef %c) local_unnamed_addr #0 {
15 %conv = trunc i32 %a to i16
16 %0 = tail call i16 @llvm.bswap.i16(i16 %conv)
17 %conv1 = zext i16 %0 to i32
18 %1 = tail call i32 @llvm.bswap.i32(i32 %b)
19 %2 = tail call i64 @llvm.bswap.i64(i64 %c)
20 %add = add nsw i32 %1, %conv1
21 %conv2 = sext i32 %add to i64
22 %add3 = add nsw i64 %2, %conv2
26 ; CHECK: r1 = bswap16 r1 # encoding: [0xd7,0x01,0x00,0x00,0x10,0x00,0x00,0x00]
27 ; CHECK: r2 = bswap32 r2 # encoding: [0xd7,0x02,0x00,0x00,0x20,0x00,0x00,0x00]
28 ; CHECK: r0 = bswap64 r0 # encoding: [0xd7,0x00,0x00,0x00,0x40,0x00,0x00,0x00]
30 ; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
31 declare i16 @llvm.bswap.i16(i16) #1
33 ; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
34 declare i32 @llvm.bswap.i32(i32) #1
36 ; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
37 declare i64 @llvm.bswap.i64(i64) #1
39 attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(none) "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
40 attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
42 !llvm.module.flags = !{!0, !1}
45 !0 = !{i32 1, !"wchar_size", i32 4}
46 !1 = !{i32 7, !"frame-pointer", i32 2}
47 !2 = !{!"clang version 17.0.0 (https://github.com/llvm/llvm-project.git a2913a8a2bfe572d2f1bfea950ab9b0848373648)"}