| 1a4b8325 | 28-Jul-2024 |
Dimitry Andric <dim@FreeBSD.org> |
Merge commit c80c09f3e380 from llvm-project (by Dimitry Andric):
[CalcSpillWeights] Avoid x87 excess precision influencing weight result
Fixes #99396
The result of `VirtRegAuxInfo::weightCal
Merge commit c80c09f3e380 from llvm-project (by Dimitry Andric):
[CalcSpillWeights] Avoid x87 excess precision influencing weight result
Fixes #99396
The result of `VirtRegAuxInfo::weightCalcHelper` can be influenced by
x87 excess precision, which can result in slightly different register
choices when the compiler is hosted on x86_64 or i386. This leads to
different object file output when cross-compiling to i386, or native.
Similar to 7af3432e22b0, we need to add a `volatile` qualifier to the
local `Weight` variable to force it onto the stack, and avoid the excess
precision. Define `stack_float_t` in `MathExtras.h` for this purpose,
and use it.
This is the version of the fix for PR276961 that landed upstream.
PR: 276961
Reported by: cperciva
MFC after: 3 days
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| edc2dc17 | 02-Jan-2024 |
Dimitry Andric <dim@FreeBSD.org> |
Revert commit 0e46b49de433 from llvm-project (by Matt Arsenault):
Reapply "RegisterCoalescer: Add implicit-def of super register when coalescing SUBREG_TO_REG"
This reverts commit c398fa009a47e
Revert commit 0e46b49de433 from llvm-project (by Matt Arsenault):
Reapply "RegisterCoalescer: Add implicit-def of super register when coalescing SUBREG_TO_REG"
This reverts commit c398fa009a47eb24f88383d5e911e59e70f8db86.
PPC backend was fixed in 2f82662ce901c6666fceb9c6c5e0de216a1c9667
Since it causes an assertion failure building /sys/dev/fb/vga.c:
https://github.com/llvm/llvm-project/issues/76416
PR: 276104
MFC after: 1 month
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