| ; RUN: opt -O2 -mtriple=bpf-pc-linux %s | llvm-dis > %t1 |
| ; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK-COMMON,CHECK %s |
| ; RUN: opt -O2 -mtriple=bpf-pc-linux -bpf-disable-avoid-speculation %s | llvm-dis > %t1 |
| ; RUN: llc %t1 -o - | FileCheck -check-prefixes=CHECK-COMMON,CHECK-DISABLE %s |
| ; |
| ; Source: |
| ; unsigned long foo(); |
| ; void *test(void *p) { |
| ; unsigned long ret = foo(); |
| ; if (ret <= 7) |
| ; p += ret; |
| ; return p; |
| ; } |
| ; Compilation flag: |
| ; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c |
| |
| ; Function Attrs: nounwind |
| define dso_local i8* @test(i8* %p) #0 { |
| entry: |
| %p.addr = alloca i8*, align 8 |
| %ret = alloca i64, align 8 |
| store i8* %p, i8** %p.addr, align 8, !tbaa !2 |
| %0 = bitcast i64* %ret to i8* |
| call void @llvm.lifetime.start.p0i8(i64 8, i8* %0) #3 |
| %call = call i64 bitcast (i64 (...)* @foo to i64 ()*)() |
| store i64 %call, i64* %ret, align 8, !tbaa !6 |
| %1 = load i64, i64* %ret, align 8, !tbaa !6 |
| %cmp = icmp ule i64 %1, 7 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %2 = load i64, i64* %ret, align 8, !tbaa !6 |
| %3 = load i8*, i8** %p.addr, align 8, !tbaa !2 |
| %add.ptr = getelementptr i8, i8* %3, i64 %2 |
| store i8* %add.ptr, i8** %p.addr, align 8, !tbaa !2 |
| br label %if.end |
| |
| if.end: ; preds = %if.then, %entry |
| %4 = load i8*, i8** %p.addr, align 8, !tbaa !2 |
| %5 = bitcast i64* %ret to i8* |
| call void @llvm.lifetime.end.p0i8(i64 8, i8* %5) #3 |
| ret i8* %4 |
| } |
| ; CHECK-COMMON: [[REG6:r[0-9]+]] = r1 |
| ; CHECK-COMMON: call foo |
| |
| ; CHECK: if r0 > 7 goto [[LABEL:.*]] |
| ; CHECK: [[REG6]] += r0 |
| ; CHECK: [[LABEL]]: |
| ; CHECK: r0 = [[REG6]] |
| |
| ; CHECK-DISABLE: [[REG1:r[0-9]+]] = 8 |
| ; CHECK-DISABLE: if [[REG1]] > r0 goto [[LABEL:.*]] |
| ; CHECK-DISABLE: r0 = 0 |
| ; CHECK-DISABLE: [[LABEL]]: |
| ; CHECK-DISABLE: [[REG6]] += r0 |
| ; CHECK-DISABLE: r0 = [[REG6]] |
| |
| ; CHECK-COMMON: exit |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1 |
| |
| declare dso_local i64 @foo(...) #2 |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1 |
| |
| 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" } |
| attributes #1 = { argmemonly nounwind willreturn } |
| 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" } |
| attributes #3 = { nounwind } |
| |
| !llvm.module.flags = !{!0} |
| !llvm.ident = !{!1} |
| |
| !0 = !{i32 1, !"wchar_size", i32 4} |
| !1 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git ca9c5433a6c31e372092fcd8bfd0e4fddd7e8784)"} |
| !2 = !{!3, !3, i64 0} |
| !3 = !{!"any pointer", !4, i64 0} |
| !4 = !{!"omnipotent char", !5, i64 0} |
| !5 = !{!"Simple C/C++ TBAA"} |
| !6 = !{!7, !7, i64 0} |
| !7 = !{!"long", !4, i64 0} |