diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2019-02-05 18:38:58 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2019-02-05 18:38:58 +0000 |
commit | e79719ce607b6130e41e23dbdc90cc6b4e0401e6 (patch) | |
tree | 47bb93fafd9582425ebb778ec77002c222f64ed4 /lib/Target/X86 | |
parent | 3edec5c15a78e4abba7eb9102fef3891c84ebdfb (diff) |
Notes
Diffstat (limited to 'lib/Target/X86')
-rw-r--r-- | lib/Target/X86/X86DiscriminateMemOps.cpp | 11 | ||||
-rw-r--r-- | lib/Target/X86/X86InsertPrefetch.cpp | 3 |
2 files changed, 13 insertions, 1 deletions
diff --git a/lib/Target/X86/X86DiscriminateMemOps.cpp b/lib/Target/X86/X86DiscriminateMemOps.cpp index 3654bf04f4e98..6bee20b617dde 100644 --- a/lib/Target/X86/X86DiscriminateMemOps.cpp +++ b/lib/Target/X86/X86DiscriminateMemOps.cpp @@ -27,6 +27,14 @@ using namespace llvm; #define DEBUG_TYPE "x86-discriminate-memops" +static cl::opt<bool> EnableDiscriminateMemops( + DEBUG_TYPE, cl::init(false), + cl::desc("Generate unique debug info for each instruction with a memory " + "operand. Should be enabled for profile-drived cache prefetching, " + "both in the build of the binary being profiled, as well as in " + "the build of the binary consuming the profile."), + cl::Hidden); + namespace { using Location = std::pair<StringRef, unsigned>; @@ -67,6 +75,9 @@ char X86DiscriminateMemOps::ID = 0; X86DiscriminateMemOps::X86DiscriminateMemOps() : MachineFunctionPass(ID) {} bool X86DiscriminateMemOps::runOnMachineFunction(MachineFunction &MF) { + if (!EnableDiscriminateMemops) + return false; + DISubprogram *FDI = MF.getFunction().getSubprogram(); if (!FDI || !FDI->getUnit()->getDebugInfoForProfiling()) return false; diff --git a/lib/Target/X86/X86InsertPrefetch.cpp b/lib/Target/X86/X86InsertPrefetch.cpp index 30b46a09ef0f9..8bd57aa2278ba 100644 --- a/lib/Target/X86/X86InsertPrefetch.cpp +++ b/lib/Target/X86/X86InsertPrefetch.cpp @@ -34,7 +34,8 @@ using namespace sampleprof; static cl::opt<std::string> PrefetchHintsFile("prefetch-hints-file", - cl::desc("Path to the prefetch hints profile."), + cl::desc("Path to the prefetch hints profile. See also " + "-x86-discriminate-memops"), cl::Hidden); namespace { |