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| author | Keith Randall <khr@golang.org> | 2023-08-21 10:03:07 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2023-08-21 20:52:15 +0000 |
| commit | 0b47b94a6275b0d0830e5ce7a03aaa99430f7f76 (patch) | |
| tree | 1602dd02a1679eb7e7f2822c60b784a532fef636 /test/codegen | |
| parent | a9bedc36a53f9d4ff6ab1c1a43c900c2fc8eba84 (diff) | |
| download | go-0b47b94a6275b0d0830e5ce7a03aaa99430f7f76.tar.gz go-0b47b94a6275b0d0830e5ce7a03aaa99430f7f76.zip | |
cmd/compile: remove more extension ops when not needed
If we're not using the upper bits, don't bother issuing a
sign/zero extension operation.
For arm64, after CL 520916 which fixed a correctness bug with
extensions but as a side effect leaves many unnecessary ones
still in place.
Change-Id: I5f4fe4efbf2e9f80969ab5b9a6122fb812dc2ec0
Reviewed-on: https://go-review.googlesource.com/c/go/+/521496
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Diffstat (limited to 'test/codegen')
| -rw-r--r-- | test/codegen/noextend.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/test/codegen/noextend.go b/test/codegen/noextend.go index 61c98a796a..98ad0ece89 100644 --- a/test/codegen/noextend.go +++ b/test/codegen/noextend.go @@ -279,3 +279,8 @@ func shouldSignEXT(x int) int64 { return ret } + +func noIntermediateExtension(a, b, c uint32) uint32 { + // arm64:-"MOVWU" + return a*b*9 + c +} |