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[fir] Add fir.no_reassoc conversion

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Currently `fir.no_reassoc` is just removed in the conversion.

This patch is part of the upstreaming effort from fir-dev branch.

Reviewed By: kiranchandramohan

Differential Revision: https://reviews.llvm.org/D114154

Co-authored-by: Eric Schweitz <eschweitz@nvidia.com>
This commit is contained in:
Valentin Clement 2021-11-19 11:33:57 +01:00
parent f3753ad774
commit b8207db700
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GPG Key ID: 086D54783C928776
2 changed files with 41 additions and 7 deletions
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28
flang/lib/Optimizer/CodeGen/CodeGen.cpp
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@ -1145,6 +1145,20 @@ struct LoadOpConversion : public FIROpConversion<fir::LoadOp> {
}
};
/// Lower `fir.no_reassoc` to LLVM IR dialect.
/// TODO: how do we want to enforce this in LLVM-IR? Can we manipulate the fast
/// math flags?
struct NoReassocOpConversion : public FIROpConversion<fir::NoReassocOp> {
using FIROpConversion::FIROpConversion;
mlir::LogicalResult
matchAndRewrite(fir::NoReassocOp noreassoc, OpAdaptor adaptor,
mlir::ConversionPatternRewriter &rewriter) const override {
rewriter.replaceOp(noreassoc, adaptor.getOperands()[0]);
return success();
}
};
/// Lower `fir.select_type` to LLVM IR dialect.
struct SelectTypeOpConversion : public FIROpConversion<fir::SelectTypeOp> {
using FIROpConversion::FIROpConversion;
@ -2166,13 +2180,13 @@ public:
FirEndOpConversion, HasValueOpConversion, GenTypeDescOpConversion,
GlobalLenOpConversion, GlobalOpConversion, InsertOnRangeOpConversion,
InsertValueOpConversion, IsPresentOpConversion, LoadOpConversion,
NegcOpConversion, MulcOpConversion, SelectCaseOpConversion,
SelectOpConversion, SelectRankOpConversion, SelectTypeOpConversion,
ShapeOpConversion, ShapeShiftOpConversion, ShiftOpConversion,
SliceOpConversion, StoreOpConversion, StringLitOpConversion,
SubcOpConversion, UnboxCharOpConversion, UnboxProcOpConversion,
UndefOpConversion, UnreachableOpConversion, ZeroOpConversion>(
typeConverter);
NegcOpConversion, NoReassocOpConversion, MulcOpConversion,
SelectCaseOpConversion, SelectOpConversion, SelectRankOpConversion,
SelectTypeOpConversion, ShapeOpConversion, ShapeShiftOpConversion,
ShiftOpConversion, SliceOpConversion, StoreOpConversion,
StringLitOpConversion, SubcOpConversion, UnboxCharOpConversion,
UnboxProcOpConversion, UndefOpConversion, UnreachableOpConversion,
ZeroOpConversion>(typeConverter);
mlir::populateStdToLLVMConversionPatterns(typeConverter, pattern);
mlir::arith::populateArithmeticToLLVMConversionPatterns(typeConverter,
pattern);

20
flang/test/Fir/convert-to-llvm.fir
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@ -1569,3 +1569,23 @@ func @field_index_dynamic_size() -> () {
// CHECK-NEXT: %{{.*}} = llvm.call @custom_typeP.field_1.offset() {field = 0 : i64} : () -> i32
// CHECK-NEXT: %{{.*}} = llvm.call @custom_typeP.field_2.offset() {field = 1 : i64} : () -> i32
// CHECK-NEXT: llvm.return
// -----
// Check `fir.no_reassoc` conversion to LLVM IR dialect
func @no_reassoc(%arg0: !fir.ref<i32>) {
%0 = fir.alloca i32
%1 = fir.load %arg0 : !fir.ref<i32>
%2 = fir.no_reassoc %1 : i32
fir.store %2 to %0 : !fir.ref<i32>
return
}
// CHECK-LABEL: llvm.func @no_reassoc(
// CHECK-SAME: %[[ARG0:.*]]: !llvm.ptr<i32>) {
// CHECK: %[[C1:.*]] = llvm.mlir.constant(1 : i64) : i64
// CHECK: %[[ALLOC:.*]] = llvm.alloca %[[C1]] x i32 {in_type = i32, operand_segment_sizes = dense<0> : vector<2xi32>} : (i64) -> !llvm.ptr<i32>
// CHECK: %[[LOAD:.*]] = llvm.load %[[ARG0]] : !llvm.ptr<i32>
// CHECK: llvm.store %[[LOAD]], %[[ALLOC]] : !llvm.ptr<i32>
// CHECK: llvm.return