1 ; RUN: llc < %s -march=bpf -mcpu=v2 -verify-machineinstrs | FileCheck %s 2 ; 3 ; Source file: 4 ; int b, c; 5 ; int test() { 6 ; int a = b; 7 ; if (a) 8 ; a = c; 9 ; return a; 10 ; } 11 @b = common local_unnamed_addr global i32 0, align 4 12 @c = common local_unnamed_addr global i32 0, align 4 13 14 ; Function Attrs: norecurse nounwind readonly 15 define i32 @test() local_unnamed_addr #0 { 16 entry: 17 %0 = load i32, i32* @b, align 4 18 %tobool = icmp eq i32 %0, 0 19 %1 = load i32, i32* @c, align 4 20 %. = select i1 %tobool, i32 0, i32 %1 21 ; CHECK: r1 = b 22 ; CHECK: r1 = *(u32 *)(r1 + 0) 23 ; CHECK: if r1 == 0 goto 24 ret i32 %. 25 } 26 27 attributes #0 = { norecurse nounwind readonly } 28 29 ; test immediate out of 32-bit range 30 ; Source file: 31 32 ; unsigned long long 33 ; load_word(void *buf, unsigned long long off) 34 ; asm("llvm.bpf.load.word"); 35 ; 36 ; int 37 ; foo(void *buf) 38 ; { 39 ; unsigned long long sum = 0; 40 ; 41 ; sum += load_word(buf, 100); 42 ; sum += load_word(buf, 104); 43 ; 44 ; if (sum != 0x1ffffffffULL) 45 ; return ~0U; 46 ; 47 ; return 0; 48 ;} 49 50 ; Function Attrs: nounwind readonly 51 define i32 @foo(i8*) local_unnamed_addr #0 { 52 %2 = tail call i64 @llvm.bpf.load.word(i8* %0, i64 100) 53 %3 = tail call i64 @llvm.bpf.load.word(i8* %0, i64 104) 54 %4 = add i64 %3, %2 55 %5 = icmp ne i64 %4, 8589934591 56 ; CHECK: r{{[0-9]+}} = 8589934591 ll 57 %6 = sext i1 %5 to i32 58 ret i32 %6 59 } 60 61 ; Function Attrs: nounwind readonly 62 declare i64 @llvm.bpf.load.word(i8*, i64) #1 63 64 ; Source file: 65 ; int m, n; 66 ; int test2() { 67 ; int a = m; 68 ; if (a < 6) 69 ; a = n; 70 ; return a; 71 ; } 72 73 @m = common local_unnamed_addr global i32 0, align 4 74 @n = common local_unnamed_addr global i32 0, align 4 75 76 ; Function Attrs: norecurse nounwind readonly 77 define i32 @test2() local_unnamed_addr #0 { 78 entry: 79 %0 = load i32, i32* @m, align 4 80 %cmp = icmp slt i32 %0, 6 81 ; CHECK: if r{{[0-9]+}} s{{<|>}} 6 goto 82 %1 = load i32, i32* @n, align 4 83 %spec.select = select i1 %cmp, i32 %1, i32 %0 84 ret i32 %spec.select 85 } 86 87 attributes #0 = { norecurse nounwind readonly } 88
