Update ARMISelLowering.cpp

AZero13 · AZero13 · commit f1cbb3af3f0f · 2025-10-26T16:31:24.000-04:00
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -20235,7 +20235,8 @@ bool ARMTargetLowering::targetShrinkDemandedConstant(
   }
 
   // Don't optimize if it is legal already.
-  if (isLegalLogicalImmediate(Mask, Subtarget))
+  if (isLegalLogicalImmediate(Mask, Subtarget) ||
+      isLegalLogicalImmediate(~Mask, Subtarget))
     return false;
 
   if (isLegalLogicalImmediate(ShrunkMask, Subtarget)) {

Original file line number	Diff line number	Diff line change
`@@ -20235,7 +20235,8 @@ bool ARMTargetLowering::targetShrinkDemandedConstant(`
`20235`	`20235`	`}`
`20236`	`20236`
`20237`	`20237`	`// Don't optimize if it is legal already.`
`20238`		`- if (isLegalLogicalImmediate(Mask, Subtarget))`
	`20238`	`+ if (isLegalLogicalImmediate(Mask, Subtarget) \|\|`
	`20239`	`+ isLegalLogicalImmediate(~Mask, Subtarget))`
`20239`	`20240`	`return false;`
`20240`	`20241`
`20241`	`20242`	`if (isLegalLogicalImmediate(ShrunkMask, Subtarget)) {`