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43ee82f217
Enable multiple COPY hints to eliminate more COPYs during register allocation. Note that this is something all targets should do, see https://reviews.llvm.org/D38128. Review: Yonghong Song llvm-svn: 325457
100 lines
2.9 KiB
LLVM
100 lines
2.9 KiB
LLVM
; RUN: llc -march=bpfel -filetype=obj -o - %s | llvm-objdump -d - | FileCheck --check-prefix=CHECK-EL %s
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; RUN: llc -march=bpfeb -filetype=obj -o - %s | llvm-objdump -d - | FileCheck --check-prefix=CHECK-EB %s
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; Function Attrs: nounwind uwtable
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define i32 @ld_b(i64 %foo, i64* nocapture %bar, i8* %ctx, i8* %ctx2) #0 {
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%1 = tail call i64 @llvm.bpf.load.byte(i8* %ctx, i64 123) #2
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%2 = add i64 %1, %foo
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%3 = load volatile i64, i64* %bar, align 8
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%4 = add i64 %2, %3
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%5 = tail call i64 @llvm.bpf.load.byte(i8* %ctx2, i64 %foo) #2
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%6 = add i64 %4, %5
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%7 = load volatile i64, i64* %bar, align 8
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%8 = add i64 %6, %7
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%9 = trunc i64 %8 to i32
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ret i32 %9
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; CHECK-LABEL: ld_b:
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; CHECK-EL: r0 = *(u8 *)skb[123]
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; CHECK-EL: r0 = *(u8 *)skb[r
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; CHECK-EB: r0 = *(u8 *)skb[123]
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; CHECK-EB: r0 = *(u8 *)skb[r
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}
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declare i64 @llvm.bpf.load.byte(i8*, i64) #1
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; Function Attrs: nounwind uwtable
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define i32 @ld_h(i8* %ctx, i8* %ctx2, i32 %foo) #0 {
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%1 = tail call i64 @llvm.bpf.load.half(i8* %ctx, i64 123) #2
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%2 = sext i32 %foo to i64
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%3 = tail call i64 @llvm.bpf.load.half(i8* %ctx2, i64 %2) #2
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%4 = add i64 %3, %1
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%5 = trunc i64 %4 to i32
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ret i32 %5
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; CHECK-LABEL: ld_h:
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; CHECK-EL: r0 = *(u16 *)skb[r
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; CHECK-EL: r0 = *(u16 *)skb[123]
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; CHECK-EB: r0 = *(u16 *)skb[r
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; CHECK-EB: r0 = *(u16 *)skb[123]
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}
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declare i64 @llvm.bpf.load.half(i8*, i64) #1
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; Function Attrs: nounwind uwtable
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define i32 @ld_w(i8* %ctx, i8* %ctx2, i32 %foo) #0 {
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%1 = tail call i64 @llvm.bpf.load.word(i8* %ctx, i64 123) #2
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%2 = sext i32 %foo to i64
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%3 = tail call i64 @llvm.bpf.load.word(i8* %ctx2, i64 %2) #2
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%4 = add i64 %3, %1
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%5 = trunc i64 %4 to i32
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ret i32 %5
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; CHECK-LABEL: ld_w:
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; CHECK-EL: r0 = *(u32 *)skb[r
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; CHECK-EL: r0 = *(u32 *)skb[123]
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; CHECK-EB: r0 = *(u32 *)skb[r
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; CHECK-EB: r0 = *(u32 *)skb[123]
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}
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declare i64 @llvm.bpf.load.word(i8*, i64) #1
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define i32 @ld_pseudo() #0 {
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entry:
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%call = tail call i64 @llvm.bpf.pseudo(i64 2, i64 3)
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tail call void inttoptr (i64 4 to void (i64, i32)*)(i64 %call, i32 4) #2
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ret i32 0
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; CHECK-LABEL: ld_pseudo:
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; CHECK-EL: ld_pseudo r1, 2, 3
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; CHECK-EB: ld_pseudo r1, 2, 3
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}
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declare i64 @llvm.bpf.pseudo(i64, i64) #2
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define i32 @bswap(i64 %a, i64 %b, i64 %c) #0 {
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entry:
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%0 = tail call i64 @llvm.bswap.i64(i64 %a)
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%conv = trunc i64 %b to i32
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%1 = tail call i32 @llvm.bswap.i32(i32 %conv)
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%conv1 = zext i32 %1 to i64
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%add = add i64 %conv1, %0
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%conv2 = trunc i64 %c to i16
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%2 = tail call i16 @llvm.bswap.i16(i16 %conv2)
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%conv3 = zext i16 %2 to i64
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%add4 = add i64 %add, %conv3
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%conv5 = trunc i64 %add4 to i32
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ret i32 %conv5
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; CHECK-LABEL: bswap:
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; CHECK-EL: r1 = be64 r1
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; CHECK-EL: r0 = be32 r0
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; CHECK-EL: r0 += r1
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; CHECK-EL: r3 = be16 r3
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; CHECK-EL: r0 += r3
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; CHECK-EB: r1 = le64 r1
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; CHECK-EB: r0 = le32 r0
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; CHECK-EB: r0 += r1
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; CHECK-EB: r3 = le16 r3
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; CHECK-EB: r0 += r3
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}
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declare i64 @llvm.bswap.i64(i64) #1
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declare i32 @llvm.bswap.i32(i32) #1
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declare i16 @llvm.bswap.i16(i16) #1
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