diff options
Diffstat (limited to 'src/jit/lclvars.cpp')
| -rw-r--r-- | src/jit/lclvars.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/jit/lclvars.cpp b/src/jit/lclvars.cpp index e64b5a1645..4770a1d2ba 100644 --- a/src/jit/lclvars.cpp +++ b/src/jit/lclvars.cpp @@ -1833,7 +1833,10 @@ bool Compiler::lvaShouldPromoteStructVar(unsigned lclNum, lvaStructPromotionInfo // TODO-PERF - Implement struct promotion for incoming multireg structs // Currently it hits assert(lvFieldCnt==1) in lclvar.cpp line 4417 - + // Also the implementation of jmp uses the 4 byte move to store + // byte parameters to the stack, so that if we have a byte field + // with something else occupying the same 4-byte slot, it will + // overwrite other fields. if (structPromotionInfo->fieldCnt != 1) { JITDUMP("Not promoting promotable struct local V%02u, because lvIsParam is true and #fields = " |