88 lines
1.9 KiB
LLVM
88 lines
1.9 KiB
LLVM
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; RUN: llc < %s -march=bpf -mcpu=v2 -verify-machineinstrs | FileCheck %s
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;
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; Source file:
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; int b, c;
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; int test() {
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; int a = b;
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; if (a)
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; a = c;
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; return a;
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; }
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@b = common local_unnamed_addr global i32 0, align 4
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@c = common local_unnamed_addr global i32 0, align 4
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; Function Attrs: norecurse nounwind readonly
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define i32 @test() local_unnamed_addr #0 {
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entry:
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%0 = load i32, i32* @b, align 4
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%tobool = icmp eq i32 %0, 0
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%1 = load i32, i32* @c, align 4
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%. = select i1 %tobool, i32 0, i32 %1
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; CHECK: r1 = b
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; CHECK: r1 = *(u32 *)(r1 + 0)
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; CHECK: if r1 == 0 goto
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ret i32 %.
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}
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attributes #0 = { norecurse nounwind readonly }
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; test immediate out of 32-bit range
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; Source file:
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; unsigned long long
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; load_word(void *buf, unsigned long long off)
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; asm("llvm.bpf.load.word");
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;
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; int
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; foo(void *buf)
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; {
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; unsigned long long sum = 0;
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;
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; sum += load_word(buf, 100);
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; sum += load_word(buf, 104);
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;
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; if (sum != 0x1ffffffffULL)
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; return ~0U;
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;
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; return 0;
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;}
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; Function Attrs: nounwind readonly
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define i32 @foo(i8*) local_unnamed_addr #0 {
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%2 = tail call i64 @llvm.bpf.load.word(i8* %0, i64 100)
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%3 = tail call i64 @llvm.bpf.load.word(i8* %0, i64 104)
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%4 = add i64 %3, %2
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%5 = icmp ne i64 %4, 8589934591
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; CHECK: r{{[0-9]+}} = 8589934591 ll
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%6 = sext i1 %5 to i32
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ret i32 %6
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}
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; Function Attrs: nounwind readonly
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declare i64 @llvm.bpf.load.word(i8*, i64) #1
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; Source file:
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; int m, n;
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; int test2() {
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; int a = m;
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; if (a < 6)
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; a = n;
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; return a;
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; }
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@m = common local_unnamed_addr global i32 0, align 4
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@n = common local_unnamed_addr global i32 0, align 4
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; Function Attrs: norecurse nounwind readonly
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define i32 @test2() local_unnamed_addr #0 {
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entry:
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%0 = load i32, i32* @m, align 4
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%cmp = icmp slt i32 %0, 6
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; CHECK: if r{{[0-9]+}} s{{<|>}} 6 goto
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%1 = load i32, i32* @n, align 4
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%spec.select = select i1 %cmp, i32 %1, i32 %0
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ret i32 %spec.select
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}
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attributes #0 = { norecurse nounwind readonly }
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