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[XRay] Use wordsize-dependent alignment for index

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This makes it simpler for the runtime to consistently handle the entries
in the function sled index in both 32 and 64 bit platforms where the
XRay runtime works.

Follow-up on D32693.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302111 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dean Michael Berris 2017-05-04 04:55:46 +00:00
parent 9e4ad9cbb5
commit dae122d59d
1 changed files with 3 additions and 3 deletions
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6
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -2811,10 +2811,10 @@ void AsmPrinter::emitXRayTable() {
// We then emit a single entry in the index per function. We use the symbols
// that bound the instrumentation map as the range for a specific function.
// Each entry here will be 16-byte aligned, as we're writing down two
// pointers.
// Each entry here will be 2 * word size aligned, as we're writing down two
// pointers. This should work for both 32-bit and 64-bit platforms.
OutStreamer->SwitchSection(FnSledIndex);
OutStreamer->EmitCodeAlignment(16);
OutStreamer->EmitCodeAlignment(2 * WordSizeBytes);
OutStreamer->EmitLabel(IdxRef);
OutStreamer->EmitSymbolValue(SledsStart, WordSizeBytes);
OutStreamer->EmitSymbolValue(SledsEnd, WordSizeBytes);