diff options
Diffstat (limited to 'lib/MC/MCExpr.cpp')
| -rw-r--r-- | lib/MC/MCExpr.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp index 0694a8fa620..a4c99a0c1c1 100644 --- a/lib/MC/MCExpr.cpp +++ b/lib/MC/MCExpr.cpp @@ -750,8 +750,22 @@ bool MCExpr::evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, if (!ABE->getLHS()->evaluateAsRelocatableImpl(LHSValue, Asm, Layout, Fixup, Addrs, InSet) || !ABE->getRHS()->evaluateAsRelocatableImpl(RHSValue, Asm, Layout, Fixup, - Addrs, InSet)) + Addrs, InSet)) { + // Check if both are Target Expressions, see if we can compare them. + if (const MCTargetExpr *L = dyn_cast<MCTargetExpr>(ABE->getLHS())) + if (const MCTargetExpr *R = cast<MCTargetExpr>(ABE->getRHS())) { + switch (ABE->getOpcode()) { + case MCBinaryExpr::EQ: + Res = MCValue::get((L->isEqualTo(R)) ? -1 : 0); + return true; + case MCBinaryExpr::NE: + Res = MCValue::get((R->isEqualTo(R)) ? 0 : -1); + return true; + default: {} + } + } return false; + } // We only support a few operations on non-constant expressions, handle // those first. |