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| author | Josh Bleecher Snyder <josharian@gmail.com> | 2020-02-06 10:36:29 -0800 |
|---|---|---|
| committer | Josh Bleecher Snyder <josharian@gmail.com> | 2020-03-02 21:59:19 +0000 |
| commit | 37fc092be1ffe4906f67eae1c4c7be40f00f89ed (patch) | |
| tree | c910cdf8d6914941ecd84caeca55e4ac7d959de5 /src/cmd/compile/internal/ssa/opGen.go | |
| parent | 63f1bc59922d454f288ad3d193bc60d7c980dbb0 (diff) | |
| download | go-37fc092be1ffe4906f67eae1c4c7be40f00f89ed.tar.gz go-37fc092be1ffe4906f67eae1c4c7be40f00f89ed.zip | |
cmd/compile: remove duplicate ppc64 rules
Const64 gets lowered to MOVDconst.
Change rules using interior Const64 to use MOVDconst instead,
to be less dependent on rule application order.
As a result of doing this, some of the rules end up being
exact duplicates; remove those.
We had those exact duplicates because of the order dependency;
ppc64 had no way to optimize away shifts by a constant
if the initial lowering didn't catch it.
Add those optimizations as well.
The outcome is the same, but this makes the overall rules more robust.
Change-Id: Iadd97a9fe73d52358d571d022ace145e506d160b
Reviewed-on: https://go-review.googlesource.com/c/go/+/220877
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Diffstat (limited to 'src/cmd/compile/internal/ssa/opGen.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/opGen.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go index d9d38a8b80..fb887017cf 100644 --- a/src/cmd/compile/internal/ssa/opGen.go +++ b/src/cmd/compile/internal/ssa/opGen.go @@ -1881,6 +1881,8 @@ const ( OpPPC64FlagEQ OpPPC64FlagLT OpPPC64FlagGT + OpPPC64FlagCarrySet + OpPPC64FlagCarryClear OpRISCV64ADD OpRISCV64ADDI @@ -24995,6 +24997,16 @@ var opcodeTable = [...]opInfo{ argLen: 0, reg: regInfo{}, }, + { + name: "FlagCarrySet", + argLen: 0, + reg: regInfo{}, + }, + { + name: "FlagCarryClear", + argLen: 0, + reg: regInfo{}, + }, { name: "ADD", |