4638eb2660
Since the symbols in the ThinLTO summary are indexed by GUID we can end up in corner cases where a callee edge in the combined index goes to a summary for a global variable. This could happen in the case of hash collisions, and in the case of SamplePGO profiles could potentially happen due to code changes (since we synthesize call edges to GUIDs that were inlined callees in the profiled code). Handle this by simply ignoring any non-FunctionSummary callees. Differential Revision: https://reviews.llvm.org/D152406
35 lines
1.5 KiB
LLVM
35 lines
1.5 KiB
LLVM
;; This test makes sure a static var is not selected as a callee target (it will
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;; have a different GUID). Similarly, ensure that a callee GUID annotated from a
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;; sample pgo profile that matches a global variable GUID (either due to code
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;; changes or a hash collision), does not get considered for importing. Either
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;; of these can crash compilation.
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/funcimport_var2.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -thinlto-action=thinlink -o %t3 %t.bc %t2.bc
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; RUN: llvm-lto -thinlto -thinlto-action=import -thinlto-index=%t3 %t.bc %t2.bc
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; RUN: llvm-lto -thinlto -thinlto-action=run %t.bc %t2.bc -exported-symbol=_Z4LinkPKcS0_
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; RUN: llvm-nm %t.bc.thinlto.o | FileCheck %s --implicit-check-not=globalvar
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; RUN: llvm-lto2 run %t.bc %t2.bc -o %t.out \
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; RUN: -r %t.bc,_Z4LinkPKcS0_,plx \
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; RUN: -r %t.bc,link,l \
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; RUN: -r %t2.bc,globalvar,plx \
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; RUN: -r %t2.bc,get_link,plx
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; RUN: llvm-nm %t.out.1 | FileCheck %s --implicit-check-not=globalvar
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; CHECK: U link
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; REQUIRES: x86-registered-target
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @_Z4LinkPKcS0_(ptr, ptr) local_unnamed_addr !prof !1 {
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%3 = tail call i32 @link(ptr %0, ptr %1) #2
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ret i32 %3
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}
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; Function Attrs: nounwind
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declare i32 @link(ptr, ptr) local_unnamed_addr
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;; This matches the GUID of global variable @globalvar in the other input.
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!1 = !{!"function_entry_count", i64 110, i64 12887606300320728018}
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