Revert "Merge pull request #5829 from MathiasVP/reorder-get-instruction-opcode"

This reverts commit 390ee3a6b8, reversing
changes made to f03c99ab03.

cpp/ql/src/semmle/code/cpp/ir/implementation/aliased_ssa/Instruction.qll

@@ -297,8 +297,7 @@ class Instruction extends Construction::TStageInstruction {
   /**
    * Gets the opcode that specifies the operation performed by this instruction.
    */
-  pragma[inline]
-  final Opcode getOpcode() { Construction::getInstructionOpcode(result, this) }
+  final Opcode getOpcode() { result = Construction::getInstructionOpcode(this) }
 
   /**
    * Gets all direct uses of the result of this instruction. The result can be

cpp/ql/src/semmle/code/cpp/ir/implementation/aliased_ssa/internal/SSAConstruction.qll

@@ -338,21 +338,15 @@ private module Cached {
     instr = unreachedInstruction(_) and result = Language::getVoidType()
   }
 
-  /**
-   * Holds if `opcode` is the opcode that specifies the operation performed by `instr`.
-   *
-   * The parameters are ordered such that they produce a clean join (with no need for reordering)
-   * in the characteristic predicates of the `Instruction` subclasses.
-   */
   cached
-  predicate getInstructionOpcode(Opcode opcode, Instruction instr) {
-    opcode = getOldInstruction(instr).getOpcode()
+  Opcode getInstructionOpcode(Instruction instr) {
+    result = getOldInstruction(instr).getOpcode()
     or
-    instr = phiInstruction(_, _) and opcode instanceof Opcode::Phi
+    instr = phiInstruction(_, _) and result instanceof Opcode::Phi
     or
-    instr = chiInstruction(_) and opcode instanceof Opcode::Chi
+    instr = chiInstruction(_) and result instanceof Opcode::Chi
     or
-    instr = unreachedInstruction(_) and opcode instanceof Opcode::Unreached
+    instr = unreachedInstruction(_) and result instanceof Opcode::Unreached
   }
 
   cached

cpp/ql/src/semmle/code/cpp/ir/implementation/raw/Instruction.qll

@@ -297,8 +297,7 @@ class Instruction extends Construction::TStageInstruction {
   /**
    * Gets the opcode that specifies the operation performed by this instruction.
    */
-  pragma[inline]
-  final Opcode getOpcode() { Construction::getInstructionOpcode(result, this) }
+  final Opcode getOpcode() { result = Construction::getInstructionOpcode(this) }
 
   /**
    * Gets all direct uses of the result of this instruction. The result can be

cpp/ql/src/semmle/code/cpp/ir/implementation/raw/internal/IRConstruction.qll

@@ -360,8 +360,8 @@ CppType getInstructionResultType(TStageInstruction instr) {
   getInstructionTranslatedElement(instr).hasInstruction(_, getInstructionTag(instr), result)
 }
 
-predicate getInstructionOpcode(Opcode opcode, TStageInstruction instr) {
-  getInstructionTranslatedElement(instr).hasInstruction(opcode, getInstructionTag(instr), _)
+Opcode getInstructionOpcode(TStageInstruction instr) {
+  getInstructionTranslatedElement(instr).hasInstruction(result, getInstructionTag(instr), _)
 }
 
 IRFunctionBase getInstructionEnclosingIRFunction(TStageInstruction instr) {

cpp/ql/src/semmle/code/cpp/ir/implementation/unaliased_ssa/Instruction.qll

@@ -297,8 +297,7 @@ class Instruction extends Construction::TStageInstruction {
   /**
    * Gets the opcode that specifies the operation performed by this instruction.
    */
-  pragma[inline]
-  final Opcode getOpcode() { Construction::getInstructionOpcode(result, this) }
+  final Opcode getOpcode() { result = Construction::getInstructionOpcode(this) }
 
   /**
    * Gets all direct uses of the result of this instruction. The result can be

cpp/ql/src/semmle/code/cpp/ir/implementation/unaliased_ssa/internal/SSAConstruction.qll

@@ -338,21 +338,15 @@ private module Cached {
     instr = unreachedInstruction(_) and result = Language::getVoidType()
   }
 
-  /**
-   * Holds if `opcode` is the opcode that specifies the operation performed by `instr`.
-   *
-   * The parameters are ordered such that they produce a clean join (with no need for reordering)
-   * in the characteristic predicates of the `Instruction` subclasses.
-   */
   cached
-  predicate getInstructionOpcode(Opcode opcode, Instruction instr) {
-    opcode = getOldInstruction(instr).getOpcode()
+  Opcode getInstructionOpcode(Instruction instr) {
+    result = getOldInstruction(instr).getOpcode()
     or
-    instr = phiInstruction(_, _) and opcode instanceof Opcode::Phi
+    instr = phiInstruction(_, _) and result instanceof Opcode::Phi
     or
-    instr = chiInstruction(_) and opcode instanceof Opcode::Chi
+    instr = chiInstruction(_) and result instanceof Opcode::Chi
     or
-    instr = unreachedInstruction(_) and opcode instanceof Opcode::Unreached
+    instr = unreachedInstruction(_) and result instanceof Opcode::Unreached
   }
 
   cached

csharp/ql/src/experimental/ir/implementation/raw/Instruction.qll

@@ -297,8 +297,7 @@ class Instruction extends Construction::TStageInstruction {
   /**
    * Gets the opcode that specifies the operation performed by this instruction.
    */
-  pragma[inline]
-  final Opcode getOpcode() { Construction::getInstructionOpcode(result, this) }
+  final Opcode getOpcode() { result = Construction::getInstructionOpcode(this) }
 
   /**
    * Gets all direct uses of the result of this instruction. The result can be

csharp/ql/src/experimental/ir/implementation/raw/internal/IRConstruction.qll

@@ -165,10 +165,10 @@ import Cached
 cached
 private module Cached {
   cached
-  predicate getInstructionOpcode(Opcode opcode, TRawInstruction instr) {
+  Opcode getInstructionOpcode(TRawInstruction instr) {
     exists(TranslatedElement element, InstructionTag tag |
       instructionOrigin(instr, element, tag) and
-      element.hasInstruction(opcode, tag, _)
+      element.hasInstruction(result, tag, _)
     )
   }
 

csharp/ql/src/experimental/ir/implementation/unaliased_ssa/Instruction.qll

@@ -297,8 +297,7 @@ class Instruction extends Construction::TStageInstruction {
   /**
    * Gets the opcode that specifies the operation performed by this instruction.
    */
-  pragma[inline]
-  final Opcode getOpcode() { Construction::getInstructionOpcode(result, this) }
+  final Opcode getOpcode() { result = Construction::getInstructionOpcode(this) }
 
   /**
    * Gets all direct uses of the result of this instruction. The result can be

csharp/ql/src/experimental/ir/implementation/unaliased_ssa/internal/SSAConstruction.qll

@@ -338,21 +338,15 @@ private module Cached {
     instr = unreachedInstruction(_) and result = Language::getVoidType()
   }
 
-  /**
-   * Holds if `opcode` is the opcode that specifies the operation performed by `instr`.
-   *
-   * The parameters are ordered such that they produce a clean join (with no need for reordering)
-   * in the characteristic predicates of the `Instruction` subclasses.
-   */
   cached
-  predicate getInstructionOpcode(Opcode opcode, Instruction instr) {
-    opcode = getOldInstruction(instr).getOpcode()
+  Opcode getInstructionOpcode(Instruction instr) {
+    result = getOldInstruction(instr).getOpcode()
     or
-    instr = phiInstruction(_, _) and opcode instanceof Opcode::Phi
+    instr = phiInstruction(_, _) and result instanceof Opcode::Phi
     or
-    instr = chiInstruction(_) and opcode instanceof Opcode::Chi
+    instr = chiInstruction(_) and result instanceof Opcode::Chi
     or
-    instr = unreachedInstruction(_) and opcode instanceof Opcode::Unreached
+    instr = unreachedInstruction(_) and result instanceof Opcode::Unreached
   }
 
   cached