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1; RUN: opt -O2 -mtriple=bpf-pc-linux %s | llvm-dis > %t12; RUN: llc %t1 -mcpu=v1 -o - | FileCheck -check-prefixes=CHECK %s3; RUN: opt -passes='default<O2>' -mtriple=bpf-pc-linux %s | llvm-dis > %t14; RUN: llc %t1 -mcpu=v1 -o - | FileCheck -check-prefixes=CHECK %s5; RUN: opt -O2 -mtriple=bpf-pc-linux -bpf-disable-serialize-icmp %s | llvm-dis > %t16; RUN: llc %t1 -mcpu=v1 -o - | FileCheck -check-prefixes=CHECK-DISABLE %s7; RUN: opt -passes='default<O2>' -mtriple=bpf-pc-linux -bpf-disable-serialize-icmp %s | llvm-dis > %t18; RUN: llc %t1 -mcpu=v1 -o - | FileCheck -check-prefixes=CHECK-DISABLE %s9;10; Source:11; int foo();12; int bar(int);13; int test() {14; int ret = foo();15; if (ret <= 0 || ret > 7)16; return 0;17; return bar(ret);18; }19; Compilation flag:20; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c21 22; Function Attrs: nounwind23define dso_local i32 @test() {24entry:25 %retval = alloca i32, align 426 %ret = alloca i32, align 427 %cleanup.dest.slot = alloca i32, align 428 call void @llvm.lifetime.start.p0(i64 4, ptr %ret)29 %call = call i32 @foo()30 store i32 %call, ptr %ret, align 4, !tbaa !231 %0 = load i32, ptr %ret, align 4, !tbaa !232 %cmp = icmp sle i32 %0, 033 br i1 %cmp, label %if.then, label %lor.lhs.false34 35; CHECK: [[REG1:r[0-9]+]] <<= 3236; CHECK: [[REG1]] s>>= 3237; CHECK: [[REG2:r[0-9]+]] = 138; CHECK: if [[REG2]] s> [[REG1]] goto39; CHECK: if [[REG1]] s> 7 goto40 41; CHECK-DISABLE: [[REG1:r[0-9]+]] += -842; CHECK-DISABLE: [[REG1]] <<= 3243; CHECK-DISABLE: [[REG1]] >>= 3244; CHECK-DISABLE: [[REG2:r[0-9]+]] = 429496728945; CHECK-DISABLE: if [[REG2]] > [[REG1]] goto46 47lor.lhs.false: ; preds = %entry48 %1 = load i32, ptr %ret, align 4, !tbaa !249 %cmp1 = icmp sgt i32 %1, 750 br i1 %cmp1, label %if.then, label %if.end51 52if.then: ; preds = %lor.lhs.false, %entry53 store i32 0, ptr %retval, align 454 store i32 1, ptr %cleanup.dest.slot, align 455 br label %cleanup56 57if.end: ; preds = %lor.lhs.false58 %2 = load i32, ptr %ret, align 4, !tbaa !259 %call2 = call i32 @bar(i32 %2)60 store i32 %call2, ptr %retval, align 461 store i32 1, ptr %cleanup.dest.slot, align 462 br label %cleanup63 64cleanup: ; preds = %if.end, %if.then65 call void @llvm.lifetime.end.p0(i64 4, ptr %ret)66 %3 = load i32, ptr %retval, align 467 ret i32 %368}69 70; Function Attrs: argmemonly nounwind willreturn71declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)72 73declare dso_local i32 @foo(...)74 75declare dso_local i32 @bar(i32)76 77; Function Attrs: argmemonly nounwind willreturn78declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)79 80!llvm.module.flags = !{!0}81!llvm.ident = !{!1}82 83!0 = !{i32 1, !"wchar_size", i32 4}84!1 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git ca9c5433a6c31e372092fcd8bfd0e4fddd7e8784)"}85!2 = !{!3, !3, i64 0}86!3 = !{!"int", !4, i64 0}87!4 = !{!"omnipotent char", !5, i64 0}88!5 = !{!"Simple C/C++ TBAA"}89