[llvm] 23b2fbf - [LoongArch] Port over minimal applyFixup from RISCV
Weining Lu via llvm-commits
llvm-commits at lists.llvm.org
Fri Aug 26 02:40:58 PDT 2022
Author: WANG Xuerui
Date: 2022-08-26T17:36:29+08:00
New Revision: 23b2fbf9ecf6c7f5ed22cf65ff1cd34f5ac6e7a0
URL: https://github.com/llvm/llvm-project/commit/23b2fbf9ecf6c7f5ed22cf65ff1cd34f5ac6e7a0
DIFF: https://github.com/llvm/llvm-project/commit/23b2fbf9ecf6c7f5ed22cf65ff1cd34f5ac6e7a0.diff
LOG: [LoongArch] Port over minimal applyFixup from RISCV
Many DebugInfo tests now pass with native builds.
Differential Revision: https://reviews.llvm.org/D132323
Added:
Modified:
llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
index dc98475267137..f9a024f57ae3e 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
@@ -73,8 +73,27 @@ void LoongArchAsmBackend::applyFixup(const MCAssembler &Asm,
MutableArrayRef<char> Data, uint64_t Value,
bool IsResolved,
const MCSubtargetInfo *STI) const {
- // TODO: Apply the Value for given Fixup into the provided data fragment.
- return;
+ if (!Value)
+ return; // Doesn't change encoding.
+
+ MCFixupKind Kind = Fixup.getKind();
+ if (Kind >= FirstLiteralRelocationKind)
+ return;
+ MCFixupKindInfo Info = getFixupKindInfo(Kind);
+ // TODO: Apply any target-specific value adjustments.
+
+ // Shift the value into position.
+ Value <<= Info.TargetOffset;
+
+ unsigned Offset = Fixup.getOffset();
+ unsigned NumBytes = alignTo(Info.TargetSize + Info.TargetOffset, 8) / 8;
+
+ assert(Offset + NumBytes <= Data.size() && "Invalid fixup offset!");
+ // For each byte of the fragment that the fixup touches, mask in the
+ // bits from the fixup value.
+ for (unsigned I = 0; I != NumBytes; ++I) {
+ Data[Offset + I] |= uint8_t((Value >> (I * 8)) & 0xff);
+ }
}
bool LoongArchAsmBackend::shouldForceRelocation(const MCAssembler &Asm,
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