[llvm] bcec41e - [NewGVN] Add support for ptrtoaddr

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2025-10-08T16:16:59+02:00
New Revision: bcec41e5e6e67ad2a5e194fe3b64d125543ca461

URL: https://github.com/llvm/llvm-project/commit/bcec41e5e6e67ad2a5e194fe3b64d125543ca461
DIFF: https://github.com/llvm/llvm-project/commit/bcec41e5e6e67ad2a5e194fe3b64d125543ca461.diff

LOG: [NewGVN] Add support for ptrtoaddr

Added: 
    

Modified: 
    llvm/lib/Transforms/Scalar/NewGVN.cpp
    llvm/test/Transforms/NewGVN/ptrtoaddr.ll

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Scalar/NewGVN.cpp b/llvm/lib/Transforms/Scalar/NewGVN.cpp
index d6b76335dbb9f..3c1a8ba308bf9 100644
--- a/llvm/lib/Transforms/Scalar/NewGVN.cpp
+++ b/llvm/lib/Transforms/Scalar/NewGVN.cpp
@@ -2066,6 +2066,7 @@ NewGVN::performSymbolicEvaluation(Instruction *I,
   case Instruction::FPTrunc:
   case Instruction::FPExt:
   case Instruction::PtrToInt:
+  case Instruction::PtrToAddr:
   case Instruction::IntToPtr:
   case Instruction::Select:
   case Instruction::ExtractElement:

diff  --git a/llvm/test/Transforms/NewGVN/ptrtoaddr.ll b/llvm/test/Transforms/NewGVN/ptrtoaddr.ll
index a6d90b160ee6c..e51b42a859be0 100644
--- a/llvm/test/Transforms/NewGVN/ptrtoaddr.ll
+++ b/llvm/test/Transforms/NewGVN/ptrtoaddr.ll
@@ -4,10 +4,7 @@
 define i64 @ptrtoaddr_same(ptr %p) {
 ; CHECK-LABEL: define i64 @ptrtoaddr_same(
 ; CHECK-SAME: ptr [[P:%.*]]) {
-; CHECK-NEXT:    [[J:%.*]] = ptrtoaddr ptr [[P]] to i64
-; CHECK-NEXT:    [[J1:%.*]] = ptrtoaddr ptr [[P]] to i64
-; CHECK-NEXT:    [[SUB:%.*]] = sub i64 [[J]], [[J1]]
-; CHECK-NEXT:    ret i64 [[SUB]]
+; CHECK-NEXT:    ret i64 0
 ;
   %i = ptrtoaddr ptr %p to i64
   %j = ptrtoaddr ptr %p to i64