1 ; RUN: opt -O2 -mtriple=bpf-pc-linux %s | llvm-dis > %t1
2 ; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK %s
3 ; RUN: opt -O2 -mtriple=bpf-pc-linux -bpf-disable-serialize-icmp %s | llvm-dis > %t1
4 ; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK-DISABLE %s
18 ; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c
20 ; Function Attrs: nounwind
21 define dso_local i32 @test() #0 {
23 %retval = alloca i32, align 4
24 %ret = alloca i32, align 4
25 %cleanup.dest.slot = alloca i32, align 4
26 call void @llvm.lifetime.start.p0(i64 4, ptr %ret) #3
27 %call = call i32 @foo()
28 store i32 %call, ptr %ret, align 4, !tbaa !2
29 %0 = load i32, ptr %ret, align 4, !tbaa !2
30 %cmp = icmp sle i32 %0, 0
31 br i1 %cmp, label %if.then, label %if.end
33 ; CHECK: [[REG1:r[0-9]+]] <<= 32
34 ; CHECK: [[REG1]] s>>= 32
35 ; CHECK: [[REG2:r[0-9]+]] = 1
36 ; CHECK: if [[REG2]] s> [[REG1]] goto
37 ; CHECK: if [[REG1]] s> 7 goto
39 ; CHECK-DISABLE: [[REG1:r[0-9]+]] += -8
40 ; CHECK-DISABLE: [[REG1]] <<= 32
41 ; CHECK-DISABLE: [[REG1]] >>= 32
42 ; CHECK-DISABLE: [[REG2:r[0-9]+]] = 4294967289
43 ; CHECK-DISABLE: if [[REG2]] > [[REG1]] goto
45 if.then: ; preds = %entry
46 store i32 0, ptr %retval, align 4
47 store i32 1, ptr %cleanup.dest.slot, align 4
50 if.end: ; preds = %entry
51 %1 = load i32, ptr %ret, align 4, !tbaa !2
52 %cmp1 = icmp sgt i32 %1, 7
53 br i1 %cmp1, label %if.then2, label %if.end3
55 if.then2: ; preds = %if.end
56 store i32 0, ptr %retval, align 4
57 store i32 1, ptr %cleanup.dest.slot, align 4
60 if.end3: ; preds = %if.end
61 %2 = load i32, ptr %ret, align 4, !tbaa !2
62 %call4 = call i32 @bar(i32 %2)
63 store i32 %call4, ptr %retval, align 4
64 store i32 1, ptr %cleanup.dest.slot, align 4
67 cleanup: ; preds = %if.end3, %if.then2, %if.then
68 call void @llvm.lifetime.end.p0(i64 4, ptr %ret) #3
69 %3 = load i32, ptr %retval, align 4
73 ; Function Attrs: argmemonly nounwind willreturn
74 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
76 declare dso_local i32 @foo(...) #2
78 declare dso_local i32 @bar(i32) #2
80 ; Function Attrs: argmemonly nounwind willreturn
81 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
83 attributes #0 = { nounwind "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
84 attributes #1 = { argmemonly nounwind willreturn }
85 attributes #2 = { "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
86 attributes #3 = { nounwind }
88 !llvm.module.flags = !{!0}
91 !0 = !{i32 1, !"wchar_size", i32 4}
92 !1 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git ca9c5433a6c31e372092fcd8bfd0e4fddd7e8784)"}
94 !3 = !{!"int", !4, i64 0}
95 !4 = !{!"omnipotent char", !5, i64 0}
96 !5 = !{!"Simple C/C++ TBAA"}