GlobalISel: add G_IMPLICIT_DEF instruction.
It looks like there are two target-independent but not GISel instructions that
need legalization, IMPLICIT_DEF and PHI. These are already anomalies since
their operands have important LLTs attached, so to make things more uniform it
seems like a good idea to add generic variants. Starting with G_IMPLICIT_DEF.
llvm-svn: 306875
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp
index 7e95759..76917aa 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp
@@ -35,6 +35,8 @@
using namespace llvm;
LegalizerInfo::LegalizerInfo() {
+ DefaultActions[TargetOpcode::G_IMPLICIT_DEF] = NarrowScalar;
+
// FIXME: these two can be legalized to the fundamental load/store Jakob
// proposed. Once loads & stores are supported.
DefaultActions[TargetOpcode::G_ANYEXT] = Legal;