bb4ba96ed2
instruction CSE'ed another. - This should be a part of D148877. Before that patch, !prof is not added to known-id-set [1], and turns out unknown types of metadata are dropped in the implementation [2]. - This test is mainly added to make sure there won't be regressions for this kind of pattern. The pattern is observed it in application code; looks like the result of indirect call is used as function arguments initially; after the function is inlined load-after-store CSE opportunity is exposed. [1]f478721231/llvm/lib/Transforms/Utils/Local.cpp (L2727-L2741)[2]ade3c6a6a8/llvm/lib/Transforms/Utils/Local.cpp (L2639)Differential Revision: https://reviews.llvm.org/D149396
32 lines
1.4 KiB
LLVM
32 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -S -passes=early-cse | FileCheck %s
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; Test that when the load from %x is CSE'ed to %call1 by EarlyCSE, the !prof metadata
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; is not dropped.
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define i32 @indirect_call_value_profile_preserved(ptr %x, i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: define i32 @indirect_call_value_profile_preserved
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; CHECK-SAME: (ptr [[X:%.*]], i32 [[A:%.*]], i32 [[B:%.*]], i32 [[C:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CALL:%.*]] = tail call ptr @_Z10createTypei(i32 [[C]])
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; CHECK-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[CALL]], align 8
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; CHECK-NEXT: [[VFN:%.*]] = getelementptr inbounds ptr, ptr [[VTABLE]], i64 1
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; CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[VFN]], align 8
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; CHECK-NEXT: [[CALL1:%.*]] = tail call i32 [[TMP0]](ptr [[CALL]], i32 [[A]], i32 [[B]]), !prof [[PROF0:![0-9]+]]
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; CHECK-NEXT: store i32 [[CALL1]], ptr [[X]], align 4
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; CHECK-NEXT: ret i32 [[CALL1]]
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;
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entry:
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%call = tail call ptr @_Z10createTypei(i32 %c)
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%vtable = load ptr, ptr %call, align 8
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%vfn = getelementptr inbounds ptr, ptr %vtable, i64 1
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%0 = load ptr, ptr %vfn, align 8
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%call1 = tail call i32 %0(ptr %call, i32 %a, i32 %b), !prof !0
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store i32 %call1, ptr %x
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%foo = load i32, ptr %x
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ret i32 %foo
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}
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declare ptr @_Z10createTypei(i32)
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!0 =!{!"VP", i32 0, i64 1600, i64 12345, i64 1030, i64 678, i64 410}
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