For immediate encodings of icmp, zero or sign extend first. Then
determine if the value is negative and flip the sign accordingly.
rdar://10422026
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144258 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 44c88aa..4c47ff9 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -1216,7 +1216,6 @@
// Check to see if the 2nd operand is a constant that we can encode directly
// in the compare.
- uint64_t Imm;
int EncodedImm = 0;
bool EncodeImm = false;
bool isNegativeImm = false;
@@ -1224,10 +1223,11 @@
if (SrcVT == MVT::i32 || SrcVT == MVT::i16 || SrcVT == MVT::i8 ||
SrcVT == MVT::i1) {
const APInt &CIVal = ConstInt->getValue();
-
- isNegativeImm = CIVal.isNegative();
- Imm = (isNegativeImm) ? (-CIVal).getZExtValue() : CIVal.getZExtValue();
- EncodedImm = (int)Imm;
+ EncodedImm = (isZExt) ? (int)CIVal.getZExtValue() : (int)CIVal.getSExtValue();
+ if (EncodedImm < 0) {
+ isNegativeImm = true;
+ EncodedImm = -EncodedImm;
+ }
EncodeImm = isThumb2 ? (ARM_AM::getT2SOImmVal(EncodedImm) != -1) :
(ARM_AM::getSOImmVal(EncodedImm) != -1);
}