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[dev.ssa] cmd/compile: start arguments as spilled

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Declare a function's arguments as having already been
spilled so their use just requires a restore.

Allow spill locations to be portions of larger objects the stack.
Required to load portions of compound input arguments.

Rename the memory input to InputMem.  Use Arg for the
pre-spilled argument values.

Change-Id: I8fe2a03ffbba1022d98bfae2052b376b96d32dda
Reviewed-on: https://go-review.googlesource.com/16536
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Keith Randall 2015-11-02 08:10:26 -08:00
parent 582baae22a
commit 02f4d0a130
27 changed files with 470 additions and 141 deletions
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2
src/cmd/compile/internal/ssa/shift_test.go
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@ -28,7 +28,7 @@ func makeConstShiftFunc(c *Config, amount int64, op Op, typ Type) fun {
ptyp := &TypeImpl{Size_: 8, Ptr: true, Name: "ptr"}
fun := Fun(c, "entry",
Bloc("entry",
Valu("mem", OpArg, TypeMem, 0, ".mem"),
Valu("mem", OpInitMem, TypeMem, 0, ".mem"),
Valu("SP", OpSP, TypeUInt64, 0, nil),
Valu("argptr", OpOffPtr, ptyp, 8, nil, "SP"),
Valu("resptr", OpOffPtr, ptyp, 16, nil, "SP"),