ce9209f50e
Added tests to the validator and fixed issues stemming from the previous skipping over BBs with single successors - which is incorrect. That would be now picked by added tests where the assertions are expected to be triggered.
85 lines
3.1 KiB
LLVM
85 lines
3.1 KiB
LLVM
; REQUIRES: asserts && x86_64-linux
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; Check that the profile annotator works: we hit an exit and non-zero paths to
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; already visited blocks count as taken (i.e. the flow continues through them).
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;
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; RUN: split-file %s %t
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; RUN: llvm-ctxprof-util fromJSON --input=%t/profile_ok.json --output=%t/profile_ok.ctxprofdata
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; RUN: llvm-ctxprof-util fromJSON --input=%t/profile_pump.json --output=%t/profile_pump.ctxprofdata
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; RUN: llvm-ctxprof-util fromJSON --input=%t/profile_unreachable.json --output=%t/profile_unreachable.ctxprofdata
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;
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; RUN: opt -passes=ctx-prof-flatten %t/example_ok.ll -use-ctx-profile=%t/profile_ok.ctxprofdata -S -o - | FileCheck %s
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; RUN: not --crash opt -passes=ctx-prof-flatten %t/message_pump.ll -use-ctx-profile=%t/profile_pump.ctxprofdata -S 2>&1 | FileCheck %s --check-prefix=ASSERTION
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; RUN: not --crash opt -passes=ctx-prof-flatten %t/unreachable.ll -use-ctx-profile=%t/profile_unreachable.ctxprofdata -S 2>&1 | FileCheck %s --check-prefix=ASSERTION
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; CHECK: br i1 %x, label %b1, label %exit, !prof ![[PROF1:[0-9]+]]
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; CHECK: br i1 %y, label %blk, label %exit, !prof ![[PROF2:[0-9]+]]
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; CHECK: ![[PROF1]] = !{!"branch_weights", i32 1, i32 1}
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; CHECK: ![[PROF2]] = !{!"branch_weights", i32 0, i32 1}
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; ASSERTION: Assertion `allTakenPathsExit()
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; b1->exit is the only way out from b1, but the exit block would have been
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; already visited from blk. That should not result in an assertion, though.
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;--- example_ok.ll
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define void @foo(i32 %t) !guid !0 {
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entry:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 0)
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br label %blk
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blk:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 1)
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%x = icmp eq i32 %t, 0
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br i1 %x, label %b1, label %exit
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b1:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 2)
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%y = icmp eq i32 %t, 0
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br i1 %y, label %blk, label %exit
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exit:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 3)
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ret void
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}
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!0 = !{i64 1234}
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;--- profile_ok.json
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[{"Guid":1234, "Counters":[2, 2, 1, 2]}]
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;--- message_pump.ll
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; This is a message pump: the loop never exits. This should result in an
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; assertion because we can't reach an exit BB
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define void @foo(i32 %t) !guid !0 {
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entry:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 0)
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br label %blk
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blk:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 1)
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%x = icmp eq i32 %t, 0
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br i1 %x, label %blk, label %exit
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exit:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 2)
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ret void
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}
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!0 = !{i64 1234}
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;--- profile_pump.json
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[{"Guid":1234, "Counters":[2, 10, 0]}]
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;--- unreachable.ll
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; An unreachable block is reached, that's an error
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define void @foo(i32 %t) !guid !0 {
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entry:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 0)
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br label %blk
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blk:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 1)
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%x = icmp eq i32 %t, 0
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br i1 %x, label %b1, label %exit
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b1:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 2)
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unreachable
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exit:
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call void @llvm.instrprof.increment(ptr @foo, i64 42, i32 42, i32 3)
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ret void
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}
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!0 = !{i64 1234}
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;--- profile_unreachable.json
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[{"Guid":1234, "Counters":[2, 1, 1, 2]}] |