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authorRafael Espindola <rafael.espindola@gmail.com>2011-02-20 20:20:07 +0000
committerRafael Espindola <rafael.espindola@gmail.com>2011-02-20 20:20:07 +0000
commitf7ad048f1e122ee4f735398786f4859392f74144 (patch)
tree92baccc7fee7eebc6ed30ae6fd62568bad49241d /lib/MC
parent8e04fc3adf3419eeb9466b66cbaf9b027dcc2cab (diff)
Add some limited support for labels in org directives. Hopefully enough to fix
PR9245. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126091 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/MC')
-rw-r--r--lib/MC/MCObjectStreamer.cpp18
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/MC/MCObjectStreamer.cpp b/lib/MC/MCObjectStreamer.cpp
index 035826690c..e67d9b03a9 100644
--- a/lib/MC/MCObjectStreamer.cpp
+++ b/lib/MC/MCObjectStreamer.cpp
@@ -242,7 +242,23 @@ void MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
void MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset,
unsigned char Value) {
- new MCOrgFragment(*Offset, Value, getCurrentSectionData());
+ int64_t Res;
+ if (Offset->EvaluateAsAbsolute(Res, getAssembler())) {
+ new MCOrgFragment(*Offset, Value, getCurrentSectionData());
+ return;
+ }
+
+ MCSymbol *CurrentPos = getContext().CreateTempSymbol();
+ EmitLabel(CurrentPos);
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+ const MCExpr *Ref =
+ MCSymbolRefExpr::Create(CurrentPos, Variant, getContext());
+ const MCExpr *Delta =
+ MCBinaryExpr::Create(MCBinaryExpr::Sub, Offset, Ref, getContext());
+
+ if (!Delta->EvaluateAsAbsolute(Res, getAssembler()))
+ report_fatal_error("expected assembly-time absolute expression");
+ EmitFill(Res, Value, 0);
}
void MCObjectStreamer::Finish() {