Adding upstream version 1.22.1.upstream/1.22.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/src/cmd/compile/internal/ssa/TODO b/src/cmd/compile/internal/ssa/TODO
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index 0000000..f4e4382
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+++ b/src/cmd/compile/internal/ssa/TODO
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+This is a list of possible improvements to the SSA pass of the compiler.
+
+Optimizations (better compiled code)
+------------------------------------
+- Reduce register pressure in scheduler
+- Make dead store pass inter-block
+- If there are a lot of MOVQ $0, ..., then load
+   0 into a register and use the register as the source instead.
+- Allow large structs to be SSAable (issue 24416)
+- Allow arrays of length >1 to be SSAable
+- If strings are being passed around without being interpreted (ptr
+  and len fields being accessed) pass them in xmm registers?
+  Same for interfaces?
+- any pointer generated by unsafe arithmetic must be non-nil?
+  (Of course that may not be true in general, but it is for all uses
+   in the runtime, and we can play games with unsafe.)
+
+Optimizations (better compiler)
+-------------------------------
+- Handle signed division overflow and sign extension earlier
+
+Regalloc
+--------
+- Make liveness analysis non-quadratic