48 lines
2 KiB
LLVM
48 lines
2 KiB
LLVM
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; RUN: llc -march=bpfel -mcpu=v4 -verify-machineinstrs -show-mc-encoding < %s | FileCheck %s
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; Source:
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; long foo(int a, int b, long c) {
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; a = __builtin_bswap16(a);
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; b = __builtin_bswap32(b);
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; c = __builtin_bswap64(c);
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; return a + b + c;
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; }
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; Compilation flags:
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; clang -target bpf -O2 -S -emit-llvm t.c
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; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
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define dso_local i64 @foo(i32 noundef %a, i32 noundef %b, i64 noundef %c) local_unnamed_addr #0 {
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entry:
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%conv = trunc i32 %a to i16
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%0 = tail call i16 @llvm.bswap.i16(i16 %conv)
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%conv1 = zext i16 %0 to i32
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%1 = tail call i32 @llvm.bswap.i32(i32 %b)
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%2 = tail call i64 @llvm.bswap.i64(i64 %c)
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%add = add nsw i32 %1, %conv1
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%conv2 = sext i32 %add to i64
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%add3 = add nsw i64 %2, %conv2
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ret i64 %add3
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}
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; CHECK: r1 = bswap16 r1 # encoding: [0xd7,0x01,0x00,0x00,0x10,0x00,0x00,0x00]
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; CHECK: r2 = bswap32 r2 # encoding: [0xd7,0x02,0x00,0x00,0x20,0x00,0x00,0x00]
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; CHECK: r0 = bswap64 r0 # encoding: [0xd7,0x00,0x00,0x00,0x40,0x00,0x00,0x00]
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; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
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declare i16 @llvm.bswap.i16(i16) #1
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; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
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declare i32 @llvm.bswap.i32(i32) #1
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; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
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declare i64 @llvm.bswap.i64(i64) #1
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attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(none) "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
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attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"frame-pointer", i32 2}
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!2 = !{!"clang version 17.0.0 (https://github.com/llvm/llvm-project.git a2913a8a2bfe572d2f1bfea950ab9b0848373648)"}
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