[llvm] e298dfb - [SCCP] Avoid ConstantExpr::get() call

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2022-07-13T16:20:34+02:00
New Revision: e298dfbc1b89fb7e0051f978bf859d6c37fd9203

URL: https://github.com/llvm/llvm-project/commit/e298dfbc1b89fb7e0051f978bf859d6c37fd9203
DIFF: https://github.com/llvm/llvm-project/commit/e298dfbc1b89fb7e0051f978bf859d6c37fd9203.diff

LOG: [SCCP] Avoid ConstantExpr::get() call

Use ConstantFoldUnaryOpOperand() API instead. This is in
preparation for removing fneg constant expressions.

Added: 
    

Modified: 
    llvm/lib/Transforms/Utils/SCCPSolver.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Utils/SCCPSolver.cpp b/llvm/lib/Transforms/Utils/SCCPSolver.cpp
index eee91e70292e3..241e054cbf30d 100644
--- a/llvm/lib/Transforms/Utils/SCCPSolver.cpp
+++ b/llvm/lib/Transforms/Utils/SCCPSolver.cpp
@@ -960,12 +960,13 @@ void SCCPInstVisitor::visitUnaryOperator(Instruction &I) {
     return (void)markOverdefined(&I);
 
   if (isConstant(V0State)) {
-    Constant *C = ConstantExpr::get(I.getOpcode(), getConstant(V0State));
-
-    // op Y -> undef.
-    if (isa<UndefValue>(C))
-      return;
-    return (void)markConstant(IV, &I, C);
+    if (Constant *C = ConstantFoldUnaryOpOperand(I.getOpcode(),
+                                                 getConstant(V0State, DL))) {
+      // op Y -> undef.
+      if (isa<UndefValue>(C))
+        return;
+      return (void)markConstant(IV, &I, C);
+    }
   }
 
   // If something is undef, wait for it to resolve.