The decision for when to say "hash/crc32".New instead of
crc32.New in an error was double-counting imports
from different packages or indirect imports, so it was
quoting even when there was no ambiguity.
R=ken2
CC=golang-dev
https://golang.org/cl/4645070
Required moving some parts of gc/pgen.c to ?g/ggen.c
on linux tests pass for all 3 architectures, and
frames are actually compacted (diagnostic code for
that has been removed from the CL).
R=rsc
CC=golang-dev
https://golang.org/cl/4571071
After allocparams and walk, remove unused auto variables
and re-layout the remaining in reverse alignment order.
R=rsc
CC=golang-dev
https://golang.org/cl/4568068
To build under clang, pass the path to clang in CC when
calling ./make.bash
CC=/opt/llvm/llvm-2.9/bin/clang ./make.bash
Credit goes to jmhodges for suggestions.
R=jeff, r, ality
CC=golang-dev
https://golang.org/cl/4527098
Input code like
0000 (x.go:2) TEXT main+0(SB),$36-0
0001 (x.go:3) MOVL $5,i+-8(SP)
0002 (x.go:3) MOVL $0,i+-4(SP)
0003 (x.go:4) MOVL $1,BX
0004 (x.go:4) MOVL i+-8(SP),AX
0005 (x.go:4) MOVL i+-4(SP),DX
0006 (x.go:4) MOVL AX,autotmp_0000+-20(SP)
0007 (x.go:4) MOVL DX,autotmp_0000+-16(SP)
0008 (x.go:4) MOVL autotmp_0000+-20(SP),CX
0009 (x.go:4) CMPL autotmp_0000+-16(SP),$0
0010 (x.go:4) JNE ,13
0011 (x.go:4) CMPL CX,$32
0012 (x.go:4) JCS ,14
0013 (x.go:4) MOVL $0,BX
0014 (x.go:4) SHLL CX,BX
0015 (x.go:4) MOVL BX,x+-12(SP)
0016 (x.go:5) MOVL x+-12(SP),AX
0017 (x.go:5) CDQ ,
0018 (x.go:5) MOVL AX,autotmp_0001+-28(SP)
0019 (x.go:5) MOVL DX,autotmp_0001+-24(SP)
0020 (x.go:5) MOVL autotmp_0001+-28(SP),AX
0021 (x.go:5) MOVL autotmp_0001+-24(SP),DX
0022 (x.go:5) MOVL AX,(SP)
0023 (x.go:5) MOVL DX,4(SP)
0024 (x.go:5) CALL ,runtime.printint+0(SB)
0025 (x.go:5) CALL ,runtime.printnl+0(SB)
0026 (x.go:6) RET ,
is problematic because the liveness range for
autotmp_0000 (0006-0009) is nested completely
inside a span where BX holds a live value (0003-0015).
Because the register allocator only looks at 0006-0009
to see which registers are used, it misses the fact that
BX is unavailable and uses it anyway.
The n->pun = anyregalloc() check in tempname is
a workaround for this bug, but I hit it again because
I did the tempname call before allocating BX, even
though I then used the temporary after storing in BX.
This should fix the real bug, and then we can remove
the workaround in tempname.
The code creates pseudo-variables for each register
and includes that information in the liveness propagation.
Then the regu fields can be populated using that more
complete information. With that approach, BX is marked
as in use on every line in the whole span 0003-0015,
so that the decision about autotmp_0000
(using only 0006-0009) still has all the information
it needs.
This is not specific to the 386, but it only happens in
generated code of the form
load R1
...
load var into R2
...
store R2 back into var
...
use R1
and for the most part the other compilers generate
the loads for a given compiled line before any of
the stores. Even so, this may not be the case everywhere,
so the change is worth making in all three.
R=ken2, ken, ken
CC=golang-dev
https://golang.org/cl/4529106
This is in preparation of escape analysis; function parameters
can now be tagged with interesting bits by the compiler by
assigning to n->note.
tested by having typecheck put a fake tag on all parameters of
pointer type and compiling the tree.
R=rsc
CC=golang-dev
https://golang.org/cl/4524092
Makes all.bash work after echo 4 >/proc/cpu/alignment,
which means kill the process on an unaligned access.
The default behavior on DreamPlug/GuruPlug/SheevaPlug
is to simulate an ARMv3 and just let the unaligned accesses
stop at the word boundary, resulting in all kinds of surprises.
Fixes#1240.
R=ken2
CC=golang-dev
https://golang.org/cl/4551064
The spec was adjusted in commit df410d6a4842 to allow the
implicit assignment of strutures with unexported fields in
method receivers. This change updates the compiler.
Also moved bug322 into fixedbugs and updated golden.out
to reflect the removal of the last known bug.
Fixes#1402.
R=golang-dev, gri, rsc
CC=golang-dev
https://golang.org/cl/4526069
Previously, whether declaring a type which copied the structure of a type it was referenced in via a pointer field would work depended on whether you declared it before or after the type it copied, e.g. type T2 T1; type T1 struct { F *T2 } would work, however type T1 struct { F *T2 }; type T2 T1 wouldn't.
Fixes#667.
R=rsc
CC=golang-dev
https://golang.org/cl/4313064
