[LLVM][IR] Fixed input arguments for Verifier getter

ParameterABIAttributes functions work with unsigned integers as the index, so having the getter be signed makes no sense. Additionally, for this reason, the loop vars that were signed were changed to unsigned too.

Reviewed By: jeroen.dobbelaere

Differential Revision: https://reviews.llvm.org/D110344

diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index b620c40..0f56d99 100644 (file)
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -3314,7 +3314,7 @@ static bool isTypeCongruent(Type *L, Type *R) {
   return PL->getAddressSpace() == PR->getAddressSpace();
 }
 
-static AttrBuilder getParameterABIAttributes(int I, AttributeList Attrs) {
+static AttrBuilder getParameterABIAttributes(unsigned I, AttributeList Attrs) {
   static const Attribute::AttrKind ABIAttrs[] = {
       Attribute::StructRet,  Attribute::ByVal,          Attribute::InAlloca,
       Attribute::InReg,      Attribute::StackAlignment, Attribute::SwiftSelf,
@@ -3382,12 +3382,12 @@ void Verifier::verifyMustTailCall(CallInst &CI) {
 
     // - Only sret, byval, swiftself, and swiftasync ABI-impacting attributes
     //   are allowed in swifttailcc call
-    for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
+    for (unsigned I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
       AttrBuilder ABIAttrs = getParameterABIAttributes(I, CallerAttrs);
       SmallString<32> Context{CCName, StringRef(" musttail caller")};
       verifyTailCCMustTailAttrs(ABIAttrs, Context);
     }
-    for (int I = 0, E = CalleeTy->getNumParams(); I != E; ++I) {
+    for (unsigned I = 0, E = CalleeTy->getNumParams(); I != E; ++I) {
       AttrBuilder ABIAttrs = getParameterABIAttributes(I, CalleeAttrs);
       SmallString<32> Context{CCName, StringRef(" musttail callee")};
       verifyTailCCMustTailAttrs(ABIAttrs, Context);
@@ -3405,7 +3405,7 @@ void Verifier::verifyMustTailCall(CallInst &CI) {
     Assert(CallerTy->getNumParams() == CalleeTy->getNumParams(),
            "cannot guarantee tail call due to mismatched parameter counts",
            &CI);
-    for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
+    for (unsigned I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
       Assert(
           isTypeCongruent(CallerTy->getParamType(I), CalleeTy->getParamType(I)),
           "cannot guarantee tail call due to mismatched parameter types", &CI);
@@ -3414,7 +3414,7 @@ void Verifier::verifyMustTailCall(CallInst &CI) {
 
   // - All ABI-impacting function attributes, such as sret, byval, inreg,
   //   returned, preallocated, and inalloca, must match.
-  for (int I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
+  for (unsigned I = 0, E = CallerTy->getNumParams(); I != E; ++I) {
     AttrBuilder CallerABIAttrs = getParameterABIAttributes(I, CallerAttrs);
     AttrBuilder CalleeABIAttrs = getParameterABIAttributes(I, CalleeAttrs);
     Assert(CallerABIAttrs == CalleeABIAttrs,