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1; RUN: opt -O2 -mtriple=bpf-pc-linux %s | llvm-dis > %t12; RUN: llc -mcpu=v1 %t1 -o - | FileCheck -check-prefixes=CHECK-COMMON,CHECK %s3; RUN: opt -O2 -mtriple=bpf-pc-linux -bpf-disable-avoid-speculation %s | llvm-dis > %t14; RUN: llc -mcpu=v1 %t1 -o - | FileCheck -check-prefixes=CHECK-COMMON,CHECK-DISABLE %s5;6; Source:7; unsigned long foo();8; ptr test(ptr p) {9; unsigned long ret = foo();10; if (ret <= 7)11; p += ret;12; return p;13; }14; Compilation flag:15; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c16 17; Function Attrs: nounwind18define dso_local ptr @test(ptr %p) {19entry:20 %p.addr = alloca ptr, align 821 %ret = alloca i64, align 822 store ptr %p, ptr %p.addr, align 8, !tbaa !223 call void @llvm.lifetime.start.p0(i64 8, ptr %ret)24 %call = call i64 @foo()25 store i64 %call, ptr %ret, align 8, !tbaa !626 %0 = load i64, ptr %ret, align 8, !tbaa !627 %cmp = icmp ule i64 %0, 728 br i1 %cmp, label %if.then, label %if.end29 30if.then: ; preds = %entry31 %1 = load i64, ptr %ret, align 8, !tbaa !632 %2 = load ptr, ptr %p.addr, align 8, !tbaa !233 %add.ptr = getelementptr i8, ptr %2, i64 %134 store ptr %add.ptr, ptr %p.addr, align 8, !tbaa !235 br label %if.end36 37if.end: ; preds = %if.then, %entry38 %3 = load ptr, ptr %p.addr, align 8, !tbaa !239 call void @llvm.lifetime.end.p0(i64 8, ptr %ret)40 ret ptr %341}42; CHECK-COMMON: [[REG6:r[0-9]+]] = r143; CHECK-COMMON: call foo44 45; CHECK: if r0 > 7 goto [[LABEL:.*]]46; CHECK: [[REG6]] += r047; CHECK: [[LABEL]]:48; CHECK: r0 = [[REG6]]49 50; CHECK-DISABLE: [[REG1:r[0-9]+]] = 851; CHECK-DISABLE: if [[REG1]] > r0 goto [[LABEL:.*]]52; CHECK-DISABLE: r0 = 053; CHECK-DISABLE: [[LABEL]]:54; CHECK-DISABLE: [[REG6]] += r055; CHECK-DISABLE: r0 = [[REG6]]56 57; CHECK-COMMON: exit58 59; Function Attrs: argmemonly nounwind willreturn60declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)61 62declare dso_local i64 @foo(...)63 64; Function Attrs: argmemonly nounwind willreturn65declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)66 67!llvm.module.flags = !{!0}68!llvm.ident = !{!1}69 70!0 = !{i32 1, !"wchar_size", i32 4}71!1 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git ca9c5433a6c31e372092fcd8bfd0e4fddd7e8784)"}72!2 = !{!3, !3, i64 0}73!3 = !{!"any pointer", !4, i64 0}74!4 = !{!"omnipotent char", !5, i64 0}75!5 = !{!"Simple C/C++ TBAA"}76!6 = !{!7, !7, i64 0}77!7 = !{!"long", !4, i64 0}78