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Code refactoring and test added for the count cttz pass! #2

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941bcf2
Code refactoring and test added for the count cttz pass!
PetarT99Syrmia Jul 6, 2023
4d52336
Added some notes!
PetarT99Syrmia Jul 13, 2023
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8 changes: 4 additions & 4 deletions llvm/lib/Transforms/Utils/PetarCountCttz.cpp
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Expand Up @@ -8,18 +8,18 @@ int countCttzIntrinsicAppearance=0;
PreservedAnalyses PetarCountCttzPass::run(Function &F, FunctionAnalysisManager &AM) {

errs() << "Function name: " << F.getName() << "\n";
errs() << "\n-------------------------------\n";
errs() << "Instructions within this function!\n";
//errs() << "\n-------------------------------\n";
//errs() << "Instructions within this function!\n";
for(BasicBlock& BB: F){
for(Instruction& I: BB){
errs()<< I.getName() << "\n";
//errs()<< I.getName() << "\n";
IntrinsicInst *II = dyn_cast<IntrinsicInst>(&I);

if(II && (II->getIntrinsicID() == Intrinsic::cttz))
countCttzIntrinsicAppearance++;
}
}
errs() << "\n-------------------------------\n";
//errs() << "\n-------------------------------\n";
errs() << "Total number of cttz intrinsic appearances is equal to: " << countCttzIntrinsicAppearance << ".\n";

return PreservedAnalyses::all();
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48 changes: 48 additions & 0 deletions llvm/test/Transforms/Util/petar-count-cttz.ll
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@@ -0,0 +1,48 @@
; RUN: opt -disable-output -passes=petarcountcttz %s 2>&1 | FileCheck %s

; CHECK: Function name: cttz_64_eq_select
; CHECK-NEXT: Total number of cttz intrinsic appearances is equal to: 1.
declare i64 @llvm.cttz.i64(i64, i1)
define i64 @cttz_64_eq_select(i64 %v) nounwind {

%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
%tobool = icmp eq i64 %v, 0
%.op = add nuw nsw i64 %cnt, 6
%add = select i1 %tobool, i64 5, i64 %.op
ret i64 %add
}

; CHECK-NEXT: Function name: cttz_64_ne_select
; CHECK-NEXT: Total number of cttz intrinsic appearances is equal to: 2.
define i64 @cttz_64_ne_select(i64 %v) nounwind {

%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
%tobool = icmp ne i64 %v, 0
%.op = add nuw nsw i64 %cnt, 6
%add = select i1 %tobool, i64 %.op, i64 5
ret i64 %add
}

; CHECK-NEXT: Function name: cttz_32_eq_select
; CHECK-NEXT: Total number of cttz intrinsic appearances is equal to: 3.
declare i32 @llvm.cttz.i32(i32, i1)
define i32 @cttz_32_eq_select(i32 %v) nounwind {

%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
%tobool = icmp eq i32 %v, 0
%.op = add nuw nsw i32 %cnt, 6
%add = select i1 %tobool, i32 5, i32 %.op
ret i32 %add
}

; CHECK-NEXT: Function name: cttz_32_ne_select
; CHECK-NEXT: Total number of cttz intrinsic appearances is equal to: 4.
define i32 @cttz_32_ne_select(i32 %v) nounwind {

%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
%tobool = icmp ne i32 %v, 0
%.op = add nuw nsw i32 %cnt, 6
%add = select i1 %tobool, i32 %.op, i32 5
ret i32 %add
}

6 changes: 6 additions & 0 deletions petar_notes.txt
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LLVM project
Author: Chris Lattner
Master thesis title: Semantic detection of a CRC function for RISCV in LLVM

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