Add new TargetInstrDesc::hasImplicitUseOfPhysReg and
hasImplicitDefOfPhysReg methods. Use them to remove a
look in X86 fast isel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68886 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index 7b114dd..0146b07 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -808,21 +808,9 @@
}
const TargetInstrDesc &TID = MI.getDesc();
- const unsigned *ImpDefs = TID.getImplicitDefs();
-
- if (TID.hasUnmodeledSideEffects()) break;
-
- bool ModifiesEFlags = false;
-
- if (ImpDefs) {
- for (unsigned u = 0; ImpDefs[u]; ++u)
- if (ImpDefs[u] == X86::EFLAGS) {
- ModifiesEFlags = true;
- break;
- }
- }
-
- if (ModifiesEFlags) break;
+ if (TID.hasUnmodeledSideEffects() ||
+ TID.hasImplicitDefOfPhysReg(X86::EFLAGS))
+ break;
}
if (SetMI) {