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[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Run the updated gofmt, which reformats doc comments,
on the main repository. Vendored files are excluded.

For #51082.

Change-Id: I7332f099b60f716295fb34719c98c04eb1a85407
Reviewed-on: https://go-review.googlesource.com/c/go/+/384268
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Russ Cox 2022-02-03 14:12:08 -05:00
parent 017933163a
commit 19309779ac
373 changed files with 3238 additions and 2532 deletions
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38
src/cmd/compile/internal/ssa/debug.go
View file

@ -402,28 +402,28 @@ func (sc *slotCanonicalizer) canonSlot(idx SlKeyIdx) LocalSlot {
// OpArg{Int,Float}Reg values, inserting additional values in
// cases where they are missing. Example:
//
// func foo(s string, used int, notused int) int {
// return len(s) + used
// }
// func foo(s string, used int, notused int) int {
// return len(s) + used
// }
//
// In the function above, the incoming parameter "used" is fully live,
// "notused" is not live, and "s" is partially live (only the length
// field of the string is used). At the point where debug value
// analysis runs, we might expect to see an entry block with:
//
// b1:
// v4 = ArgIntReg <uintptr> {s+8} [0] : BX
// v5 = ArgIntReg <int> {used} [0] : CX
// b1:
// v4 = ArgIntReg <uintptr> {s+8} [0] : BX
// v5 = ArgIntReg <int> {used} [0] : CX
//
// While this is an accurate picture of the live incoming params,
// we also want to have debug locations for non-live params (or
// their non-live pieces), e.g. something like
//
// b1:
// v9 = ArgIntReg <*uint8> {s+0} [0] : AX
// v4 = ArgIntReg <uintptr> {s+8} [0] : BX
// v5 = ArgIntReg <int> {used} [0] : CX
// v10 = ArgIntReg <int> {unused} [0] : DI
// b1:
// v9 = ArgIntReg <*uint8> {s+0} [0] : AX
// v4 = ArgIntReg <uintptr> {s+8} [0] : BX
// v5 = ArgIntReg <int> {used} [0] : CX
// v10 = ArgIntReg <int> {unused} [0] : DI
//
// This function examines the live OpArg{Int,Float}Reg values and
// synthesizes new (dead) values for the non-live params or the
@ -1489,14 +1489,14 @@ func setupLocList(ctxt *obj.Link, f *Func, list []byte, st, en ID) ([]byte, int)
// that spills a register arg. It returns the ID of that instruction
// Example:
//
// b1:
// v3 = ArgIntReg <int> {p1+0} [0] : AX
// ... more arg regs ..
// v4 = ArgFloatReg <float32> {f1+0} [0] : X0
// v52 = MOVQstore <mem> {p1} v2 v3 v1
// ... more stores ...
// v68 = MOVSSstore <mem> {f4} v2 v67 v66
// v38 = MOVQstoreconst <mem> {blob} [val=0,off=0] v2 v32
// b1:
// v3 = ArgIntReg <int> {p1+0} [0] : AX
// ... more arg regs ..
// v4 = ArgFloatReg <float32> {f1+0} [0] : X0
// v52 = MOVQstore <mem> {p1} v2 v3 v1
// ... more stores ...
// v68 = MOVSSstore <mem> {f4} v2 v67 v66
// v38 = MOVQstoreconst <mem> {blob} [val=0,off=0] v2 v32
//
// Important: locatePrologEnd is expected to work properly only with
// optimization turned off (e.g. "-N"). If optimization is enabled