48 lines · plain
1; RUN: llc -mtriple=bpfel -mcpu=v4 -verify-machineinstrs -show-mc-encoding < %s | FileCheck %s2; Source:3; long foo(int a, int b, long c) {4; a = __builtin_bswap16(a);5; b = __builtin_bswap32(b);6; c = __builtin_bswap64(c);7; return a + b + c;8; }9; Compilation flags:10; clang -target bpf -O2 -S -emit-llvm t.c11 12; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)13define dso_local i64 @foo(i32 noundef %a, i32 noundef %b, i64 noundef %c) local_unnamed_addr #0 {14entry:15 %conv = trunc i32 %a to i1616 %0 = tail call i16 @llvm.bswap.i16(i16 %conv)17 %conv1 = zext i16 %0 to i3218 %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, %conv121 %conv2 = sext i32 %add to i6422 %add3 = add nsw i64 %2, %conv223 ret i64 %add324}25 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]29 30; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)31declare i16 @llvm.bswap.i16(i16) #132 33; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)34declare i32 @llvm.bswap.i32(i32) #135 36; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)37declare i64 @llvm.bswap.i64(i64) #138 39attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(none) "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }40attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }41 42!llvm.module.flags = !{!0, !1}43!llvm.ident = !{!2}44 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)"}48