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Revision tags: llvmorg-21-init, llvmorg-19.1.7, llvmorg-19.1.6, llvmorg-19.1.5, llvmorg-19.1.4 |
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73e89cf6 |
| 16-Nov-2024 |
Kazu Hirata <kazu@google.com> |
[Mips] Remove unused includes (NFC) (#116499)
Identified with misc-include-cleaner.
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Revision tags: llvmorg-19.1.3, llvmorg-19.1.2, llvmorg-19.1.1, llvmorg-19.1.0, llvmorg-19.1.0-rc4, llvmorg-19.1.0-rc3, llvmorg-19.1.0-rc2, llvmorg-19.1.0-rc1, llvmorg-20-init, llvmorg-18.1.8, llvmorg-18.1.7, llvmorg-18.1.6, llvmorg-18.1.5, llvmorg-18.1.4, llvmorg-18.1.3, llvmorg-18.1.2, llvmorg-18.1.1, llvmorg-18.1.0, llvmorg-18.1.0-rc4, llvmorg-18.1.0-rc3, llvmorg-18.1.0-rc2, llvmorg-18.1.0-rc1, llvmorg-19-init, llvmorg-17.0.6, llvmorg-17.0.5, llvmorg-17.0.4, llvmorg-17.0.3, llvmorg-17.0.2, llvmorg-17.0.1, llvmorg-17.0.0, llvmorg-17.0.0-rc4, llvmorg-17.0.0-rc3, llvmorg-17.0.0-rc2, llvmorg-17.0.0-rc1, llvmorg-18-init, llvmorg-16.0.6, llvmorg-16.0.5, llvmorg-16.0.4, llvmorg-16.0.3, llvmorg-16.0.2, llvmorg-16.0.1, llvmorg-16.0.0, llvmorg-16.0.0-rc4, llvmorg-16.0.0-rc3, llvmorg-16.0.0-rc2, llvmorg-16.0.0-rc1, llvmorg-17-init, llvmorg-15.0.7, llvmorg-15.0.6, llvmorg-15.0.5, llvmorg-15.0.4, llvmorg-15.0.3, working, llvmorg-15.0.2, llvmorg-15.0.1, llvmorg-15.0.0, llvmorg-15.0.0-rc3, llvmorg-15.0.0-rc2, llvmorg-15.0.0-rc1, llvmorg-16-init, llvmorg-14.0.6, llvmorg-14.0.5, llvmorg-14.0.4, llvmorg-14.0.3, llvmorg-14.0.2, llvmorg-14.0.1, llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3, llvmorg-14.0.0-rc2, llvmorg-14.0.0-rc1, llvmorg-15-init, llvmorg-13.0.1, llvmorg-13.0.1-rc3 |
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| #
ee198df2 |
| 20-Jan-2022 |
Random06457 <28494085+Random06457@users.noreply.github.com> |
[mips] Improve vr4300 mulmul bugfix pass
When compiling with dwarf info, the mfix4300 flag introduced in
https://reviews.llvm.org/D116238 can miss some occurrences of the vr4300
mulmul bug if a debu
[mips] Improve vr4300 mulmul bugfix pass
When compiling with dwarf info, the mfix4300 flag introduced in
https://reviews.llvm.org/D116238 can miss some occurrences of the vr4300
mulmul bug if a debug instruction happens to be between two `muls`
instructions. This change skips debug instructions in order to fix
the mulmul bug detection.
Fixes https://github.com/llvm/llvm-project/issues/53094
Differential Revision: https://reviews.llvm.org/D117615
show more ...
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Revision tags: llvmorg-13.0.1-rc2 |
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2edcde00 |
| 27-Dec-2021 |
Random <ikhbeilfnpz.enfmjk@gmail.com> |
[MIPS] Add -mfix4300 flag to enable vr4300 mulmul bugfix pass
Early revisions of the VR4300 have a hardware bug where two consecutive
multiplications can produce an incorrect result in the second mu
[MIPS] Add -mfix4300 flag to enable vr4300 mulmul bugfix pass
Early revisions of the VR4300 have a hardware bug where two consecutive
multiplications can produce an incorrect result in the second multiply.
This revision adds the `-mfix4300` flag to llvm (and clang) which, when
passed, provides a software fix for this issue.
More precise description of the "mulmul" bug:
```
mul.[s,d] fd,fs,ft
mul.[s,d] fd,fs,ft or [D]MULT[U] rs,rt
```
When the above sequence is executed by the CPU, if at least one of the
source operands of the first mul instruction happens to be `sNaN`, `0`
or `Infinity`, then the second mul instruction may produce an incorrect
result. This can happen both if the two mul instructions are next to each
other and if the first one is in a delay slot and the second is the first
instruction of the branch target.
Description of the fix:
This fix adds a backend pass to llvm which scans for mul instructions in
each basic block and inserts a nop whenever the following conditions are
met:
- The current instruction is a single or double-precision floating-point
mul instruction.
- The next instruction is either a mul instruction (any kind) or a branch
instruction.
Differential Revision: https://reviews.llvm.org/D116238
show more ...
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