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| author | Michael J. Spencer <bigcheesegs@gmail.com> | 2018-06-02 16:33:01 +0000 |
|---|---|---|
| committer | Michael J. Spencer <bigcheesegs@gmail.com> | 2018-06-02 16:33:01 +0000 |
| commit | ae6eeaea9283a2d0da50af842c3d76cc651926f8 (patch) | |
| tree | 9c0d09daf7d28d668f279b185308091be499f7d5 /llvm/lib/MC/MCStreamer.cpp | |
| parent | 93d8fbd8f263e71aabc0cbb4492098ea9105285f (diff) | |
| download | llvm-ae6eeaea9283a2d0da50af842c3d76cc651926f8.zip llvm-ae6eeaea9283a2d0da50af842c3d76cc651926f8.tar.gz llvm-ae6eeaea9283a2d0da50af842c3d76cc651926f8.tar.bz2 | |
[MC] Add assembler support for .cg_profile.
Object FIle Representation
At codegen time this is emitted into the ELF file a pair of symbol indices and a weight. In assembly it looks like:
.cg_profile a, b, 32
.cg_profile freq, a, 11
.cg_profile freq, b, 20
When writing an ELF file these are put into a SHT_LLVM_CALL_GRAPH_PROFILE (0x6fff4c02) section as (uint32_t, uint32_t, uint64_t) tuples as (from symbol index, to symbol index, weight).
Differential Revision: https://reviews.llvm.org/D44965
llvm-svn: 333823
Diffstat (limited to 'llvm/lib/MC/MCStreamer.cpp')
| -rw-r--r-- | llvm/lib/MC/MCStreamer.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp index 89d418d..491fec3 100644 --- a/llvm/lib/MC/MCStreamer.cpp +++ b/llvm/lib/MC/MCStreamer.cpp @@ -661,6 +661,10 @@ void MCStreamer::EmitWinEHHandlerData(SMLoc Loc) { getContext().reportError(Loc, "Chained unwind areas can't have handlers!"); } +void MCStreamer::emitCGProfileEntry(const MCSymbolRefExpr *From, + const MCSymbolRefExpr *To, uint64_t Count) { +} + static MCSection *getWinCFISection(MCContext &Context, unsigned *NextWinCFIID, MCSection *MainCFISec, const MCSection *TextSec) { |