6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-04 21:30:49 +00:00
Code Issues Projects Releases Wiki Activity

Not all constants are legal immediates in load/store instructions.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22704 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-08 06:25:50 +00:00
parent ca60967eea
commit 3821e478a5
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/Transforms/Scalar/LoopStrengthReduce.cpp
View File

@ -435,7 +435,13 @@ void BasedUser::RewriteInstructionToUseNewBase(Value *NewBase,
static bool isTargetConstant(const SCEVHandle &V) {
// FIXME: Look at the target to decide if &GV is a legal constant immediate.
if (isa<SCEVConstant>(V)) return true;
if (SCEVConstant *SC = dyn_cast<SCEVConstant>(V)) {
// PPC allows a sign-extended 16-bit immediate field.
if ((int64_t)SC->getValue()->getRawValue() > -(1 << 16) &&
(int64_t)SC->getValue()->getRawValue() < (1 << 16)-1)
return true;
return false;
}
return false; // ENABLE this for x86