diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/loopbce.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/loopbce.go | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/cmd/compile/internal/ssa/loopbce.go b/src/cmd/compile/internal/ssa/loopbce.go index bfa2597493..d53014943d 100644 --- a/src/cmd/compile/internal/ssa/loopbce.go +++ b/src/cmd/compile/internal/ssa/loopbce.go @@ -96,17 +96,18 @@ func findIndVar(f *Func) []indVar { // Check thet the control if it either ind </<= max or max >/>= ind. // TODO: Handle 32-bit comparisons. // TODO: Handle unsigned comparisons? - switch b.Control.Op { + c := b.Controls[0] + switch c.Op { case OpLeq64: flags |= indVarMaxInc fallthrough case OpLess64: - ind, max = b.Control.Args[0], b.Control.Args[1] + ind, max = c.Args[0], c.Args[1] case OpGeq64: flags |= indVarMaxInc fallthrough case OpGreater64: - ind, max = b.Control.Args[1], b.Control.Args[0] + ind, max = c.Args[1], c.Args[0] default: continue } @@ -207,7 +208,7 @@ func findIndVar(f *Func) []indVar { } // Handle induction variables of these forms. // KNN is known-not-negative. - // SIGNED ARITHMETIC ONLY. (see switch on b.Control.Op above) + // SIGNED ARITHMETIC ONLY. (see switch on c above) // Possibilities for KNN are len and cap; perhaps we can infer others. // for i := 0; i <= KNN-k ; i += k // for i := 0; i < KNN-(k-1); i += k |