Disable my constant island pass optimization (to make use soimm more effectively). It caused infinite looping on lencod.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76995 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp
index 1f584d4..48db39b 100644
--- a/lib/Target/ARM/ARMConstantIslandPass.cpp
+++ b/lib/Target/ARM/ARMConstantIslandPass.cpp
@@ -696,13 +696,11 @@
// User before the Trial.
if (TrialOffset - UserOffset <= MaxDisp)
return true;
- if (IsSoImm && ARM_AM::getSOImmVal(TrialOffset - UserOffset) != -1)
- return true;
+ // FIXME: Make use full range of soimm values.
} else if (NegativeOK) {
if (UserOffset - TrialOffset <= MaxDisp)
return true;
- if (IsSoImm && ARM_AM::getSOImmVal(~(TrialOffset - UserOffset)) != -1)
- return true;
+ // FIXME: Make use full range of soimm values.
}
return false;
}
diff --git a/lib/Target/ARM/README.txt b/lib/Target/ARM/README.txt
index 3e8c54a..a587a2b 100644
--- a/lib/Target/ARM/README.txt
+++ b/lib/Target/ARM/README.txt
@@ -541,3 +541,8 @@
//===---------------------------------------------------------------------===//
We need to fix constant isel for ARMv6t2 to use MOVT.
+
+//===---------------------------------------------------------------------===//
+
+Constant island pass should make use of full range SoImm values for LEApcrel.
+Be careful though as the last attempt caused infinite looping on lencod.