diff options
Diffstat (limited to 'vm/compiler/codegen')
| -rw-r--r-- | vm/compiler/codegen/mips/LocalOptimizations.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/vm/compiler/codegen/mips/LocalOptimizations.cpp b/vm/compiler/codegen/mips/LocalOptimizations.cpp index 2ccd40dcd..1ef0d1744 100644 --- a/vm/compiler/codegen/mips/LocalOptimizations.cpp +++ b/vm/compiler/codegen/mips/LocalOptimizations.cpp @@ -400,7 +400,10 @@ static void applyLoadHoisting(CompilationUnit *cUnit, MipsLIR *curLIR = prevInstList[slot]; MipsLIR *prevLIR = prevInstList[slot+1]; - /* Check the highest instruction */ + /* + * Check the highest instruction. + * ENCODE_ALL represents a scheduling barrier. + */ if (prevLIR->defMask == ENCODE_ALL) { /* * If the first instruction is a load, don't hoist anything @@ -408,10 +411,13 @@ static void applyLoadHoisting(CompilationUnit *cUnit, */ if (EncodingMap[curLIR->opcode].flags & IS_LOAD) continue; /* - * If the remaining number of slots is less than LD_LATENCY, - * insert the hoisted load here. + * Need to unconditionally break here even if the hoisted + * distance is greater than LD_LATENCY (ie more than enough + * cycles are inserted to hide the load latency) since theu + * subsequent code doesn't expect to compare against a + * pseudo opcode (whose opcode value is negative). */ - if (slot < LD_LATENCY) break; + break; } /* |