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cmd/compile: ppc64le working, not optimized enough

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This time with the cherry-pick from the proper patch of
the old CL.

Stack size increased.
Corrected NaN-comparison glitches.
Marked g register as clobbered by calls.
Fixed shared libraries.

live_ssa.go still disabled because of differences.
Presumably turning on more optimization will fix
both the stack size and the live_ssa.go glitches.

Enhanced debugging output for shared libs test.

Rebased onto master.

Updates #16010.

Change-Id: I40864faf1ef32c118fb141b7ef8e854498e6b2c4
Reviewed-on: https://go-review.googlesource.com/27159
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
David Chase 2016-08-15 13:51:00 -07:00
parent dea6dab40c
commit 5b9ff11c3d
17 changed files with 121 additions and 128 deletions
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8
src/cmd/compile/internal/ssa/regalloc.go
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@ -480,12 +480,20 @@ func (s *regAllocState) init(f *Func) {
if s.f.Config.ctxt.Framepointer_enabled && s.f.Config.FPReg >= 0 {
s.allocatable &^= 1 << uint(s.f.Config.FPReg)
}
if s.f.Config.ctxt.Flag_shared {
switch s.f.Config.arch {
case "ppc64le": // R2 already reserved.
s.allocatable &^= 1 << 11 // R12 -- R0 is skipped in PPC64Ops.go
}
}
if s.f.Config.ctxt.Flag_dynlink {
switch s.f.Config.arch {
case "amd64":
s.allocatable &^= 1 << 15 // R15
case "arm":
s.allocatable &^= 1 << 9 // R9
case "ppc64le": // R2 already reserved.
s.allocatable &^= 1 << 11 // R12 -- R0 is skipped in PPC64Ops.go
case "arm64":
// nothing to do?
case "386":