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AMDGPU: Fix unreachable when emitting binary debug info

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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
This commit is contained in:
Matt Arsenault 2015-07-30 17:03:08 +00:00
parent fbd94791e6
commit b240003d58
1 changed files with 33 additions and 1 deletions
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34
lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp
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@ -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);
}
}
}