diff options
Diffstat (limited to 'llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp index 25a3d4df435..4c0098f8e9d 100644 --- a/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp +++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp @@ -26,6 +26,7 @@ #include "llvm/MC/MCInstrInfo.h" #include "llvm/MC/MCRegisterInfo.h" #include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/raw_ostream.h" using namespace llvm; @@ -912,6 +913,20 @@ ARMMCCodeEmitter::getHiLo16ImmOpValue(const MCInst &MI, unsigned OpIdx, const ARMMCExpr *ARM16Expr = cast<ARMMCExpr>(E); E = ARM16Expr->getSubExpr(); + if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(E)) { + const int64_t Value = MCE->getValue(); + if (Value > UINT32_MAX) + report_fatal_error("constant value truncated (limited to 32-bit)"); + + switch (ARM16Expr->getKind()) { + case ARMMCExpr::VK_ARM_HI16: + return (int32_t(Value) & 0xffff0000) >> 16; + case ARMMCExpr::VK_ARM_LO16: + return (int32_t(Value) & 0x0000ffff); + default: llvm_unreachable("Unsupported ARMFixup"); + } + } + switch (ARM16Expr->getKind()) { default: llvm_unreachable("Unsupported ARMFixup"); case ARMMCExpr::VK_ARM_HI16: |
