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NFC: MergeFunctions update more comments

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They are wordy. Some words were wrong.

llvm-svn: 266124
This commit is contained in:
JF Bastien 2016-04-12 21:13:01 +00:00
parent a55b68a75e
commit a12f95f3b7
1 changed files with 8 additions and 7 deletions
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15
lib/Transforms/IPO/MergeFunctions.cpp
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@ -320,8 +320,8 @@ private:
int cmpValues(const Value *L, const Value *R);
/// Compare two Instructions for equivalence, similar to
/// Instruction::isSameOperationAs but with modifications to the type
/// comparison.
/// Instruction::isSameOperationAs.
///
/// Stages are listed in "most significant stage first" order:
/// On each stage below, we do comparison between some left and right
/// operation parts. If parts are non-equal, we assign parts comparison
@ -339,8 +339,9 @@ private:
/// For example, for Load it would be:
/// 6.1.Load: volatile (as boolean flag)
/// 6.2.Load: alignment (as integer numbers)
/// 6.3.Load: synch-scope (as integer numbers)
/// 6.4.Load: range metadata (as integer numbers)
/// 6.3.Load: ordering (as underlying enum class value)
/// 6.4.Load: synch-scope (as integer numbers)
/// 6.5.Load: range metadata (as integer ranges)
/// On this stage its better to see the code, since its not more than 10-15
/// strings for particular instruction, and could change sometimes.
int cmpOperations(const Instruction *L, const Instruction *R) const;
@ -905,9 +906,9 @@ int FunctionComparator::cmpTypes(Type *TyL, Type *TyR) const {
int FunctionComparator::cmpOperations(const Instruction *L,
const Instruction *R) const {
// Differences from Instruction::isSameOperationAs:
// * replace type comparison with calls to isEquivalentType.
// * we test for I->hasSameSubclassOptionalData (nuw/nsw/tail) at the top
// * because of the above, we don't test for the tail bit on calls later on
// * replace type comparison with calls to cmpTypes.
// * we test for I->getRawSubclassOptionalData (nuw/nsw/tail) at the top.
// * because of the above, we don't test for the tail bit on calls later on.
if (int Res = cmpNumbers(L->getOpcode(), R->getOpcode()))
return Res;