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[llvm-profdata] Change instr prof counter overflow to saturate rather…
… than discard Summary: This changes overflow handling during instrumentation profile merge. Rathar than throwing away records that would result in counter overflow, merged counts are instead clamped to the maximum representable value. A warning about counter overflow is still surfaced to the user as before. Reviewers: dnovillo, davidxl, silvas Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D14893 llvm-svn: 254525
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Nathan Slingerland
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Dec 2, 2015
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Original file line number | Diff line number | Diff line change |
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# RUN: llvm-profdata merge %s -o %t.out 2>&1 | FileCheck %s | ||
# CHECK: overflow.proftext: overflow: Counter overflow | ||
# RUN: llvm-profdata merge %s -o %t.out 2>&1 | FileCheck %s --check-prefix=MERGE | ||
# RUN: llvm-profdata show %t.out | FileCheck %s --check-prefix=SHOW | ||
# MERGE: overflow.proftext: overflow: Counter overflow | ||
# SHOW: Total functions: 1 | ||
# SHOW: Maximum function count: 18446744073709551615 | ||
# SHOW: Maximum internal block count: 18446744073709551615 | ||
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