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[circt-lec] Register Verif dialects (#7744) 

verif.assume can be used to annotate pre-condtion directly in the
IR. This is quite useful when verifying transformation which involves
undefined values. For example when lowering comb.shl to AIG, the
conversion pass chooses arbitary values for out-of-bounds situation.
So we cannot verify the equivalence unless we specify the pre-condtion
with verif.assume
This commit is contained in:
Hideto Ueno 2024-10-28 20:49:45 +09:00 committed by GitHub
parent c6983697fb
commit b79242dc8d
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3 changed files with 15 additions and 3 deletions
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10
integration_test/circt-lec/comb.mlir
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@ -80,8 +80,10 @@ hw.module @divs(in %in1: i32, in %in2: i32, out out: i32) {
// comb.divu
// RUN: circt-lec %s -c1=divu_unsafe -c2=divu_unsafe --shared-libs=%libz3 | FileCheck %s --check-prefix=COMB_DIVU_UNSAFE
// RUN: circt-lec %s -c1=divu -c2=divu --shared-libs=%libz3 | FileCheck %s --check-prefix=COMB_DIVU
// RUN: circt-lec %s -c1=divu_assume -c2=divu_assume --shared-libs=%libz3 | FileCheck %s --check-prefix=COMB_DIVU_ASSUME
// COMB_DIVU_UNSAFE: c1 != c2
// COMB_DIVU: c1 == c2
// COMB_DIVU_ASSUME: c1 == c2
hw.module @divu_unsafe(in %in1: i32, in %in2: i32, out out: i32) {
%0 = comb.divu %in1, %in2 : i32
@ -96,6 +98,14 @@ hw.module @divu(in %in1: i32, in %in2: i32, out out: i32) {
hw.output %3 : i32
}
hw.module @divu_assume(in %in1: i32, in %in2: i32, out out: i32) {
%0 = hw.constant 0 : i32
%1 = comb.icmp ne %in2, %0 : i32
verif.assume %1 : i1
%2 = comb.divu %in1, %in2 : i32
hw.output %2 : i32
}
// comb.extract
// TODO

1
tools/circt-lec/CMakeLists.txt
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@ -21,6 +21,7 @@ target_link_libraries(circt-lec
CIRCTHW
CIRCTSMT
CIRCTSupport
CIRCTVerif
MLIRIR
MLIRFuncDialect
MLIRArithDialect

7
tools/circt-lec/circt-lec.cpp
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@ -19,6 +19,7 @@
#include "circt/Dialect/Comb/CombDialect.h"
#include "circt/Dialect/HW/HWDialect.h"
#include "circt/Dialect/SMT/SMTDialect.h"
#include "circt/Dialect/Verif/VerifDialect.h"
#include "circt/Support/Passes.h"
#include "circt/Support/Version.h"
#include "circt/Tools/circt-lec/Passes.h"
@ -352,9 +353,9 @@ int main(int argc, char **argv) {
// Register the supported CIRCT dialects and create a context to work with.
DialectRegistry registry;
registry.insert<circt::comb::CombDialect, circt::hw::HWDialect,
circt::smt::SMTDialect, mlir::func::FuncDialect,
mlir::LLVM::LLVMDialect, mlir::arith::ArithDialect,
mlir::BuiltinDialect>();
circt::smt::SMTDialect, circt::verif::VerifDialect,
mlir::func::FuncDialect, mlir::LLVM::LLVMDialect,
mlir::arith::ArithDialect, mlir::BuiltinDialect>();
mlir::func::registerInlinerExtension(registry);
mlir::registerBuiltinDialectTranslation(registry);
mlir::registerLLVMDialectTranslation(registry);