[llgo] Roll gofrontend forward

Switch gofrontend to using go.googlesource.com, and
update to 81eb6a3f425b2158c67ee32c0cc973a72ce9d6be.

There are various changes required to update to the
go 1.5 runtime:

typemap.go is changed to accommodate the change in representation for equal/hash algorithms, and the removal of the zero value/type.
CMakeLists.txt is updated to add the build tree to the package search path, so internal packages, which are not installed, are found.
various files changes due to removal of __go_new_nopointers; the same change as in D11863, but with NoUnwindAttribute added to the added runtime functions which are called with "callOnly".
minor cleanups in ssa.go while investigating issues with unwinding/panic handling.

Differential Revisision: http://reviews.llvm.org/D15188

llvm-svn: 263536

1 files changed, 2 insertions, 2 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/regexp/syntax/prog.go b/llgo/third_party/gofrontend/libgo/go/regexp/syntax/prog.go
index 29bd282d0d9..ae6db31a441 100644
--- a/llgo/third_party/gofrontend/libgo/go/regexp/syntax/prog.go
+++ b/llgo/third_party/gofrontend/libgo/go/regexp/syntax/prog.go
@@ -189,7 +189,7 @@ Loop:
 
 const noMatch = -1
 
-// MatchRune returns true if the instruction matches (and consumes) r.
+// MatchRune reports whether the instruction matches (and consumes) r.
 // It should only be called when i.Op == InstRune.
 func (i *Inst) MatchRune(r rune) bool {
 	return i.MatchRunePos(r) != noMatch
@@ -256,7 +256,7 @@ func wordRune(r rune) bool {
 		('0' <= r && r <= '9')
 }
 
-// MatchEmptyWidth returns true if the instruction matches
+// MatchEmptyWidth reports whether the instruction matches
 // an empty string between the runes before and after.
 // It should only be called when i.Op == InstEmptyWidth.
 func (i *Inst) MatchEmptyWidth(before rune, after rune) bool {