When MC was first added, targets could use hasRawTextSupport to keep features
working before they were added to the MC interface.
The design goal of MC is to provide an uniform api for printing assembly and
object files. Short of relaxations and other corner cases, a object file is
just another representation of the assembly.
It was never the intention that targets would keep doing things like
if (hasRawTextSupport())
Set flags in one way.
else
Set flags in another way.
When they do that they create two code paths and the object file is no longer
just another representation of the assembly. This also then requires testing
with llc -filetype=obj, which is extremelly brittle.
This patch removes some of these hacks by replacing them with smaller ones.
The ARM flag setting is trivial, so I just moved it to the constructor. For
Mips, the patch adds two temporary hack directives that allow the assembly
to represent the same things as the object file was already able to.
The hope is that the mips developers will replace the hack directives with
the same ones that gas uses and drop the -print-hack-directives flag.
I will also try to implement a target streamer interface, so that we can
move this out of the common code.
In summary, for any new work, two rules of the thumb are
* Don't use "llc -filetype=obj" in tests.
* Don't add calls to hasRawTextSupport.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192035 91177308-0d34-0410-b5e6-96231b3b80d8
This patch handles LLVM standalone assembler (llvm-mc) ELF flag setting based on input file
directive processing.
Mips assembly requires processing inline directives that directly and
indirectly affect the output ELF header flags. This patch handles one
".abicalls".
To process these directives we are following the model the code generator
uses by storing state in a container as we go through processing and when
we detect the end of input file processing, AsmParser is notified and we
update the ELF header flags through a MipsELFStreamer method with a call from
MCTargetAsmParser::emitEndOfAsmFile(MCStreamer &OutStreamer).
This patch will allow other targets the same functionality.
Jack
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191982 91177308-0d34-0410-b5e6-96231b3b80d8
optimizeSelect folds (predicated) copy instructions, it must not ignore
the original register class of the operand when replacing the register
with the copies dest register.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191963 91177308-0d34-0410-b5e6-96231b3b80d8
The jump doesn't really kill the registers, the following call does but
we never get back anyway.
This avoids some verify-machineinstrs problems when TAILJUMPs are
if-converted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191962 91177308-0d34-0410-b5e6-96231b3b80d8
Copy over the whole register machine operand instead of creating a new one
with an incomplete set of flags.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191961 91177308-0d34-0410-b5e6-96231b3b80d8
There are no corresponding patterns for small immediates because they would
prevent the use of fused compare-and-branch instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191775 91177308-0d34-0410-b5e6-96231b3b80d8
This function-attribute modifies the callee-saved register list and function
epilogue (specifically the return instruction) so that a routine is suitable
for use as an interrupt-handler of the specified type without disrupting
user-mode applications.
rdar://problem/14207019
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191766 91177308-0d34-0410-b5e6-96231b3b80d8
Floats are stored in the high 32 bits of an FPR, and the only GPR<->FPR
transfers are full-register transfers. This patch optimizes GPR<->FPR
float transfers when the high word of a GPR is directly accessible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191764 91177308-0d34-0410-b5e6-96231b3b80d8
Similar to low words, we can use the shorter LLIHL and LLIHH if it turns
out that the other half of the GR64 isn't live.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191750 91177308-0d34-0410-b5e6-96231b3b80d8
