[GlobalISel] Fix assert failure when legalizing non-power-2 loads.
Until we support extending loads properly we're going to fall back for these.
We already handle stores in the same way, so this is just being consistent.
llvm-svn: 324001
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 773e51c..ed1f0c9 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -709,9 +709,12 @@
return Legalized;
}
case TargetOpcode::G_LOAD: {
- assert(alignTo(MRI.getType(MI.getOperand(0).getReg()).getSizeInBits(), 8) ==
- WideTy.getSizeInBits() &&
- "illegal to increase number of bytes loaded");
+ // For some types like i24, we might try to widen to i32. To properly handle
+ // this we should be using a dedicated extending load, until then avoid
+ // trying to legalize.
+ if (alignTo(MRI.getType(MI.getOperand(0).getReg()).getSizeInBits(), 8) !=
+ WideTy.getSizeInBits())
+ return UnableToLegalize;
unsigned DstExt = MRI.createGenericVirtualRegister(WideTy);
MIRBuilder.buildLoad(DstExt, MI.getOperand(1).getReg(),