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| author | Keith Randall <khr@golang.org> | 2021-09-19 14:20:56 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2021-09-20 16:27:53 +0000 |
| commit | 79159f2e83662dac4089e2f5231ec23de9da10b9 (patch) | |
| tree | 590b9067e0f2f9614f7b42ef051fde20fe18f19e /src/cmd/compile/internal/ssa/gen/ARM.rules | |
| parent | eff27e858b771bf5e0b5e7e836827c7d2941e6d4 (diff) | |
| download | go-79159f2e83662dac4089e2f5231ec23de9da10b9.tar.gz go-79159f2e83662dac4089e2f5231ec23de9da10b9.zip | |
cmd/compile: fix simplification rules on arm/arm64
Fixes #48473
Change-Id: Ic1e918f916eae223a3b530a51a58f03031924670
Reviewed-on: https://go-review.googlesource.com/c/go/+/350913
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Diffstat (limited to 'src/cmd/compile/internal/ssa/gen/ARM.rules')
| -rw-r--r-- | src/cmd/compile/internal/ssa/gen/ARM.rules | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/ARM.rules b/src/cmd/compile/internal/ssa/gen/ARM.rules index a6686237be..2bc58a3c47 100644 --- a/src/cmd/compile/internal/ssa/gen/ARM.rules +++ b/src/cmd/compile/internal/ssa/gen/ARM.rules @@ -1239,24 +1239,24 @@ (AND x (MVN y)) => (BIC x y) // simplification with *shift ops -(SUBshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(SUBshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(SUBshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0]) -(RSBshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(RSBshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(RSBshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0]) -(ANDshiftLL x y:(SLLconst x [c]) [d]) && c==d => y -(ANDshiftRL x y:(SRLconst x [c]) [d]) && c==d => y -(ANDshiftRA x y:(SRAconst x [c]) [d]) && c==d => y -(ORshiftLL x y:(SLLconst x [c]) [d]) && c==d => y -(ORshiftRL x y:(SRLconst x [c]) [d]) && c==d => y -(ORshiftRA x y:(SRAconst x [c]) [d]) && c==d => y -(XORshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(XORshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(XORshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0]) -(BICshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(BICshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0]) -(BICshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0]) +(SUBshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(SUBshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(SUBshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(RSBshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(RSBshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(RSBshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(ANDshiftLL y:(SLLconst x [c]) x [c]) => y +(ANDshiftRL y:(SRLconst x [c]) x [c]) => y +(ANDshiftRA y:(SRAconst x [c]) x [c]) => y +(ORshiftLL y:(SLLconst x [c]) x [c]) => y +(ORshiftRL y:(SRLconst x [c]) x [c]) => y +(ORshiftRA y:(SRAconst x [c]) x [c]) => y +(XORshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(XORshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(XORshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(BICshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(BICshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(BICshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) (AND x (MVNshiftLL y [c])) => (BICshiftLL x y [c]) (AND x (MVNshiftRL y [c])) => (BICshiftRL x y [c]) (AND x (MVNshiftRA y [c])) => (BICshiftRA x y [c]) |