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Author SHA1 Message Date
Nick Desaulniers 3787ee4571 reland [IR] make -stack-alignment= into a module attr 
Relands commit 433c8d950c with fixes for
MIPS.

Similar to D102742, specifying the stack alignment via CodegenOpts means
that this flag gets dropped during LTO, unless the command line is
re-specified as a plugin opt. Instead, encode this information as a
module level attribute so that we don't have to expose this llvm
internal flag when linking the Linux kernel with LTO.

Looks like external dependencies might need a fix:
* https://github.com/llvm-hs/llvm-hs/issues/345
* https://github.com/halide/Halide/issues/6079

Link: https://github.com/ClangBuiltLinux/linux/issues/1377

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D103048
 2021-06-08 10:59:46 -07:00
Fangrui Song 502a77f125 Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351 2019-12-24 15:57:33 -08:00
Simon Atanasyan 623282f0dd [mips] Explicitly select `mips32r2` CPU for test cases require 64-bit FPU. NFC 
Support for 64-bit coprocessors on a 32-bit architecture
was added in `MIPS32 R2`.

llvm-svn: 365507
 2019-07-09 15:48:05 +00:00
John Baldwin 1255b165bf [MIPS] Implement support for -mstack-alignment. 
Summary:
This is modeled on the implementation for x86 which stores the command line
option in a 'StackAlignOverride' field in MipsSubtarget and then uses this
to compute a 'stackAlignment' value in
MipsSubtarget::initializeSubtargetDependencies.

The stackAlignment() method in MipsSubTarget is renamed to getStackAlignment()
and returns the computed 'stackAlignment'.

Reviewers: sdardis

Reviewed By: sdardis

Subscribers: llvm-commits, arichardson

Differential Revision: https://reviews.llvm.org/D35874

llvm-svn: 310891
 2017-08-14 21:49:38 +00:00
John Baldwin eebcc47500 [MIPS] Use ABI to determine stack alignment. 
Summary:
The stack alignment depends on the ABI (16 bytes for N32 and N64 and 8
bytes for O32), not the CPU type.

Reviewers: sdardis

Reviewed By: sdardis

Subscribers: atanasyan, arichardson, llvm-commits

Differential Revision: https://reviews.llvm.org/D36326

llvm-svn: 310768
 2017-08-11 22:07:56 +00:00
Akira Hatanaka 8f1caeb0e1 [mips] Partially revert r193641. Stack alignment should not be determined by 
the floating point register mode.
 

llvm-svn: 194423
 2013-11-11 21:49:03 +00:00
Akira Hatanaka 6b2d841975 [mips] Align the stack to 16-bytes for mfp64. 
llvm-svn: 193641
 2013-10-29 19:29:03 +00:00