From b240003d58863597541db0ddcffe73cb6208df49 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Thu, 30 Jul 2015 17:03:08 +0000
Subject: [PATCH] AMDGPU: Fix unreachable when emitting binary debug info
Copy implementation of applyFixup from AArch64 with AArch64 bits
ripped out.
Tests will be included with a later commit. Several other
problems must be fixed before binary debug info emission
will work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243660 91177308-0d34-0410-b5e6-96231b3b80d8
---
.../AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp | 34 ++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)
diff --git a/lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp b/lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp
index 468563c4498..4434d9b119c 100644
--- a/lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp
+++ b/lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp
@@ -71,12 +71,26 @@ void AMDGPUMCObjectWriter::writeObject(MCAssembler &Asm,
}
}
+static unsigned getFixupKindNumBytes(unsigned Kind) {
+ switch (Kind) {
+ case FK_Data_1:
+ return 1;
+ case FK_Data_2:
+ return 2;
+ case FK_Data_4:
+ return 4;
+ case FK_Data_8:
+ return 8;
+ default:
+ llvm_unreachable("Unknown fixup kind!");
+ }
+}
+
void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
unsigned DataSize, uint64_t Value,
bool IsPCRel) const {
switch ((unsigned)Fixup.getKind()) {
- default: llvm_unreachable("Unknown fixup kind");
case AMDGPU::fixup_si_sopp_br: {
uint16_t *Dst = (uint16_t*)(Data + Fixup.getOffset());
*Dst = (Value - 4) / 4;
@@ -96,6 +110,24 @@ void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
*Dst = Value + 4;
break;
}
+ default: {
+ // FIXME: Copied from AArch64
+ unsigned NumBytes = getFixupKindNumBytes(Fixup.getKind());
+ if (!Value)
+ return; // Doesn't change encoding.
+ MCFixupKindInfo Info = getFixupKindInfo(Fixup.getKind());
+
+ // Shift the value into position.
+ Value <<= Info.TargetOffset;
+
+ unsigned Offset = Fixup.getOffset();
+ assert(Offset + NumBytes <= DataSize && "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);
+ }
}
}
--
2.34.1