diff options
Diffstat (limited to 'src/cmd/compile/internal/ssagen/ssa.go')
| -rw-r--r-- | src/cmd/compile/internal/ssagen/ssa.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go index 161469ea67..7e2f6a7471 100644 --- a/src/cmd/compile/internal/ssagen/ssa.go +++ b/src/cmd/compile/internal/ssagen/ssa.go @@ -7335,6 +7335,18 @@ func (s *State) PrepareCall(v *ssa.Value) { call, ok := v.Aux.(*ssa.AuxCall) + if ok && call.Fn == ir.Syms.Deferreturn { + // Deferred calls will appear to be returning to + // the CALL deferreturn(SB) that we are about to emit. + // However, the stack trace code will show the line + // of the instruction byte before the return PC. + // To avoid that being an unrelated instruction, + // insert an actual hardware NOP that will have the right line number. + // This is different from obj.ANOP, which is a virtual no-op + // that doesn't make it into the instruction stream. + Arch.Ginsnopdefer(s.pp) + } + if ok { // Record call graph information for nowritebarrierrec // analysis. |