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Michael Munday bbee5236cd [release-branch.go1.15] cmd/internal/obj: fix inline marker issue on s390x
The optimization that replaces inline markers with pre-existing
instructions assumes that 'Prog' values produced by the compiler are
still reachable after the assembler has run. This was not true on
s390x where the assembler was removing NOP instructions from the
linked list of 'Prog' values. This led to broken inlining data
which in turn caused an infinite loop in the runtime traceback code.

Fix this by stopping the s390x assembler backend removing NOP
values. It does not make any difference to the output of the
assembler because NOP instructions are 0 bytes long anyway.

Note: compiler check omitted from backport to reduce risk of change.

Fixes #40693.

Change-Id: I4eb570de13165cde342d5fb2ee3218945ddf4b52
Reviewed-on: https://go-review.googlesource.com/c/go/+/248478
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2020-09-10 18:29:56 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api go/printer: remove exported StdFormat flag 2020-07-17 02:15:01 +00:00
doc [release-branch.go1.15] doc/go1.14: document json.Umarshal map key support of TextUnmarshaler 2020-09-02 13:39:54 +00:00
lib/time lib/time, time/tzdata: update tz data to 2020a 2020-04-30 08:07:39 +00:00
misc cmd/cgo: fix mangling of enum and union types 2020-07-31 16:35:33 +00:00
src [release-branch.go1.15] cmd/internal/obj: fix inline marker issue on s390x 2020-09-10 18:29:56 +00:00
test [release-branch.go1.15] cmd/compile: fix checkptr handling of &^ 2020-08-21 23:45:40 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore
AUTHORS A+C: add Kush Patel (corporate CLA for Hootsuite Inc) 2020-07-08 00:10:44 +00:00
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CONTRIBUTORS [release-branch.go1.15] all: merge master into release-branch.go1.15 2020-08-11 17:05:57 +00:00
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VERSION [release-branch.go1.15] go1.15.2 2020-09-09 16:38:12 +00:00

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