GlobalISel: fall back gracefully when we can't map an operand's size.

AArch64 was asserting when it was asked to provide a register-bank of a size it
couldn't deal with (in this case an s128 IMPLICIT_DEF). But we want a robust
fallback path so this isn't allowed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294248 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 4 deletions

diff --git a/lib/Target/AArch64/AArch64RegisterBankInfo.h b/lib/Target/AArch64/AArch64RegisterBankInfo.h
index bc609f422ac..0a795a42c0b 100644
--- a/lib/Target/AArch64/AArch64RegisterBankInfo.h
+++ b/lib/Target/AArch64/AArch64RegisterBankInfo.h
@@ -47,11 +47,12 @@ protected:
   static PartialMappingIdx BankIDToCopyMapIdx[];
 
   enum ValueMappingIdx {
-    First3OpsIdx = 0,
-    Last3OpsIdx = 18,
+    InvalidIdx = 0,
+    First3OpsIdx = 1,
+    Last3OpsIdx = 19,
     DistanceBetweenRegBanks = 3,
-    FirstCrossRegCpyIdx = 21,
-    LastCrossRegCpyIdx = 33,
+    FirstCrossRegCpyIdx = 22,
+    LastCrossRegCpyIdx = 34,
     DistanceBetweenCrossRegCpy = 2
   };