[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, 22 insertions, 21 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/debug/dwarf/const.go b/llgo/third_party/gofrontend/libgo/go/debug/dwarf/const.go
index 6cc6bc937a5..2170db1e32d 100644
--- a/llgo/third_party/gofrontend/libgo/go/debug/dwarf/const.go
+++ b/llgo/third_party/gofrontend/libgo/go/debug/dwarf/const.go
@@ -453,29 +453,30 @@ const (
 	encImaginaryFloat = 0x09
 )
 
-// Line number opcodes.
+// Statement program standard opcode encodings.
 const (
-	LineExtendedOp     = 0
-	LineCopy           = 1
-	LineAdvancePC      = 2
-	LineAdvanceLine    = 3
-	LineSetFile        = 4
-	LineSetColumn      = 5
-	LineNegateStmt     = 6
-	LineSetBasicBlock  = 7
-	LineConstAddPC     = 8
-	LineFixedAdvancePC = 9
-	// next 3 are DWARF 3
-	LineSetPrologueEnd   = 10
-	LineSetEpilogueBegin = 11
-	LineSetISA           = 12
+	lnsCopy           = 1
+	lnsAdvancePC      = 2
+	lnsAdvanceLine    = 3
+	lnsSetFile        = 4
+	lnsSetColumn      = 5
+	lnsNegateStmt     = 6
+	lnsSetBasicBlock  = 7
+	lnsConstAddPC     = 8
+	lnsFixedAdvancePC = 9
+
+	// DWARF 3
+	lnsSetPrologueEnd   = 10
+	lnsSetEpilogueBegin = 11
+	lnsSetISA           = 12
 )
 
-// Line number extended opcodes.
+// Statement program extended opcode encodings.
 const (
-	LineExtEndSequence = 1
-	LineExtSetAddress  = 2
-	LineExtDefineFile  = 3
-	// next 1 is DWARF 4
-	LineExtSetDiscriminator = 4
+	lneEndSequence = 1
+	lneSetAddress  = 2
+	lneDefineFile  = 3
+
+	// DWARF 4
+	lneSetDiscriminator = 4
 )