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| author | Heschi Kreinick <heschi@google.com> | 2018-02-28 16:30:07 -0500 |
|---|---|---|
| committer | Heschi Kreinick <heschi@google.com> | 2018-03-02 18:55:45 +0000 |
| commit | caa1b4afbd145358450587053f290e6870c04b1c (patch) | |
| tree | 0f6d2f71c2945dcca2f1606b34b81fd9ce1ca338 /src/cmd/compile/internal/ssa/gen/ARM64Ops.go | |
| parent | b77aad089176ecab971d3a72f0357ed0abc81f4a (diff) | |
| download | go-caa1b4afbd145358450587053f290e6870c04b1c.tar.gz go-caa1b4afbd145358450587053f290e6870c04b1c.zip | |
cmd/compile/internal/ssa: note zero-width Ops
Add a bool to opInfo to indicate if an Op never results in any
instructions. This is a conservative approximation: some operations,
like Copy, may or may not generate code depending on their arguments.
I built the list by reading each arch's ssaGenValue function. Hopefully
I got them all.
Change-Id: I130b251b65f18208294e129bb7ddc3f91d57d31d
Reviewed-on: https://go-review.googlesource.com/97957
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/cmd/compile/internal/ssa/gen/ARM64Ops.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/gen/ARM64Ops.go | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/ARM64Ops.go b/src/cmd/compile/internal/ssa/gen/ARM64Ops.go index 0e458053cf..14b1c9afa4 100644 --- a/src/cmd/compile/internal/ssa/gen/ARM64Ops.go +++ b/src/cmd/compile/internal/ssa/gen/ARM64Ops.go @@ -217,8 +217,8 @@ func init() { {name: "CLZW", argLength: 1, reg: gp11, asm: "CLZW"}, // count leading zero, 32-bit {name: "VCNT", argLength: 1, reg: fp11, asm: "VCNT"}, // count set bits for each 8-bit unit and store the result in each 8-bit unit {name: "VUADDLV", argLength: 1, reg: fp11, asm: "VUADDLV"}, // unsigned sum of eight bytes in a 64-bit value, zero extended to 64-bit. - {name: "LoweredRound32F", argLength: 1, reg: fp11, resultInArg0: true}, - {name: "LoweredRound64F", argLength: 1, reg: fp11, resultInArg0: true}, + {name: "LoweredRound32F", argLength: 1, reg: fp11, resultInArg0: true, zeroWidth: true}, + {name: "LoweredRound64F", argLength: 1, reg: fp11, resultInArg0: true, zeroWidth: true}, // 3-operand, the addend comes first {name: "FMADDS", argLength: 3, reg: fp31, asm: "FMADDS"}, // +arg0 + (arg1 * arg2) @@ -459,7 +459,7 @@ func init() { // Scheduler ensures LoweredGetClosurePtr occurs only in entry block, // and sorts it to the very beginning of the block to prevent other // use of R26 (arm64.REGCTXT, the closure pointer) - {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R26")}}}, + {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R26")}}, zeroWidth: true}, // LoweredGetCallerSP returns the SP of the caller of the current function. {name: "LoweredGetCallerSP", reg: gp01, rematerializeable: true}, |