Emit nuw and nsw for mul and add when lowering to llvm.getelementptr #140966
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Now that the GEP no wrap flags are known when lowering to llvm.getelementptr, we can also emit nuw and nsw for the generated llvm.mul and llvm.add when no unsigned wrap and no signed wrap are used respectively. fixes: iree-org/iree#20483 Signed-off-by: Lin, Peiyong <linpyong@gmail.com>
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@llvm/pr-subscribers-mlir-llvm Author: Peiyong Lin (lpy) ChangesNow that the GEP no wrap flags are known when lowering to llvm.getelementptr, we can also emit nuw and nsw for the generated llvm.mul and llvm.add when no unsigned wrap and no signed wrap are used respectively. fixes: iree-org/iree#20483 Full diff: https://github.com/llvm/llvm-project/pull/140966.diff 3 Files Affected:
diff --git a/mlir/lib/Conversion/LLVMCommon/Pattern.cpp b/mlir/lib/Conversion/LLVMCommon/Pattern.cpp
index 8da850678878d..48fbcbcdbbde9 100644
--- a/mlir/lib/Conversion/LLVMCommon/Pattern.cpp
+++ b/mlir/lib/Conversion/LLVMCommon/Pattern.cpp
@@ -73,6 +73,15 @@ Value ConvertToLLVMPattern::getStridedElementPtr(
Value base =
memRefDescriptor.bufferPtr(rewriter, loc, *getTypeConverter(), type);
+ LLVM::IntegerOverflowFlags intOverflowFlags =
+ LLVM::IntegerOverflowFlags::none;
+ if (LLVM::bitEnumContainsAny(noWrapFlags, LLVM::GEPNoWrapFlags::nusw)) {
+ intOverflowFlags = intOverflowFlags | LLVM::IntegerOverflowFlags::nsw;
+ }
+ if (LLVM::bitEnumContainsAny(noWrapFlags, LLVM::GEPNoWrapFlags::nuw)) {
+ intOverflowFlags = intOverflowFlags | LLVM::IntegerOverflowFlags::nuw;
+ }
+
Type indexType = getIndexType();
Value index;
for (int i = 0, e = indices.size(); i < e; ++i) {
@@ -82,10 +91,12 @@ Value ConvertToLLVMPattern::getStridedElementPtr(
ShapedType::isDynamic(strides[i])
? memRefDescriptor.stride(rewriter, loc, i)
: createIndexAttrConstant(rewriter, loc, indexType, strides[i]);
- increment = rewriter.create<LLVM::MulOp>(loc, increment, stride);
+ increment = rewriter.create<LLVM::MulOp>(loc, increment, stride,
+ intOverflowFlags);
}
- index =
- index ? rewriter.create<LLVM::AddOp>(loc, index, increment) : increment;
+ index = index ? rewriter.create<LLVM::AddOp>(loc, index, increment,
+ intOverflowFlags)
+ : increment;
}
Type elementPtrType = memRefDescriptor.getElementPtrType();
diff --git a/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir b/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
index 9ca8bcd1491bc..543fdf5c26f5e 100644
--- a/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
+++ b/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
@@ -175,8 +175,8 @@ func.func @mixed_load(%mixed : memref<42x?xf32>, %i : index, %j : index) {
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.load %[[addr]] : !llvm.ptr -> f32
%0 = memref.load %mixed[%i, %j] : memref<42x?xf32>
@@ -192,8 +192,8 @@ func.func @dynamic_load(%dynamic : memref<?x?xf32>, %i : index, %j : index) {
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.load %[[addr]] : !llvm.ptr -> f32
%0 = memref.load %dynamic[%i, %j] : memref<?x?xf32>
@@ -230,8 +230,8 @@ func.func @dynamic_store(%dynamic : memref<?x?xf32>, %i : index, %j : index, %va
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.store %{{.*}}, %[[addr]] : f32, !llvm.ptr
memref.store %val, %dynamic[%i, %j] : memref<?x?xf32>
@@ -247,8 +247,8 @@ func.func @mixed_store(%mixed : memref<42x?xf32>, %i : index, %j : index, %val :
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.store %{{.*}}, %[[addr]] : f32, !llvm.ptr
memref.store %val, %mixed[%i, %j] : memref<42x?xf32>
diff --git a/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir b/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir
index b03ac2c20112b..040a27e160557 100644
--- a/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir
+++ b/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir
@@ -138,8 +138,8 @@ func.func @static_load(%static : memref<10x42xf32>, %i : index, %j : index) {
// CHECK-DAG: %[[JJ:.*]] = builtin.unrealized_conversion_cast %[[J]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %{{.*}}[1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK: %[[st0:.*]] = llvm.mlir.constant(42 : index) : i64
-// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] : i64
-// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] : i64
+// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] overflow<nsw, nuw> : i64
// CHECK: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK: llvm.load %[[addr]] : !llvm.ptr -> f32
%0 = memref.load %static[%i, %j] : memref<10x42xf32>
@@ -166,8 +166,8 @@ func.func @static_store(%static : memref<10x42xf32>, %i : index, %j : index, %va
// CHECK-DAG: %[[JJ:.*]] = builtin.unrealized_conversion_cast %[[J]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %{{.*}}[1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK: %[[st0:.*]] = llvm.mlir.constant(42 : index) : i64
-// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] : i64
-// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] : i64
+// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] overflow<nsw, nuw> : i64
// CHECK: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK: llvm.store %{{.*}}, %[[addr]] : f32, !llvm.ptr
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@llvm/pr-subscribers-mlir Author: Peiyong Lin (lpy) ChangesNow that the GEP no wrap flags are known when lowering to llvm.getelementptr, we can also emit nuw and nsw for the generated llvm.mul and llvm.add when no unsigned wrap and no signed wrap are used respectively. fixes: iree-org/iree#20483 Full diff: https://github.com/llvm/llvm-project/pull/140966.diff 3 Files Affected:
diff --git a/mlir/lib/Conversion/LLVMCommon/Pattern.cpp b/mlir/lib/Conversion/LLVMCommon/Pattern.cpp
index 8da850678878d..48fbcbcdbbde9 100644
--- a/mlir/lib/Conversion/LLVMCommon/Pattern.cpp
+++ b/mlir/lib/Conversion/LLVMCommon/Pattern.cpp
@@ -73,6 +73,15 @@ Value ConvertToLLVMPattern::getStridedElementPtr(
Value base =
memRefDescriptor.bufferPtr(rewriter, loc, *getTypeConverter(), type);
+ LLVM::IntegerOverflowFlags intOverflowFlags =
+ LLVM::IntegerOverflowFlags::none;
+ if (LLVM::bitEnumContainsAny(noWrapFlags, LLVM::GEPNoWrapFlags::nusw)) {
+ intOverflowFlags = intOverflowFlags | LLVM::IntegerOverflowFlags::nsw;
+ }
+ if (LLVM::bitEnumContainsAny(noWrapFlags, LLVM::GEPNoWrapFlags::nuw)) {
+ intOverflowFlags = intOverflowFlags | LLVM::IntegerOverflowFlags::nuw;
+ }
+
Type indexType = getIndexType();
Value index;
for (int i = 0, e = indices.size(); i < e; ++i) {
@@ -82,10 +91,12 @@ Value ConvertToLLVMPattern::getStridedElementPtr(
ShapedType::isDynamic(strides[i])
? memRefDescriptor.stride(rewriter, loc, i)
: createIndexAttrConstant(rewriter, loc, indexType, strides[i]);
- increment = rewriter.create<LLVM::MulOp>(loc, increment, stride);
+ increment = rewriter.create<LLVM::MulOp>(loc, increment, stride,
+ intOverflowFlags);
}
- index =
- index ? rewriter.create<LLVM::AddOp>(loc, index, increment) : increment;
+ index = index ? rewriter.create<LLVM::AddOp>(loc, index, increment,
+ intOverflowFlags)
+ : increment;
}
Type elementPtrType = memRefDescriptor.getElementPtrType();
diff --git a/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir b/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
index 9ca8bcd1491bc..543fdf5c26f5e 100644
--- a/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
+++ b/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
@@ -175,8 +175,8 @@ func.func @mixed_load(%mixed : memref<42x?xf32>, %i : index, %j : index) {
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.load %[[addr]] : !llvm.ptr -> f32
%0 = memref.load %mixed[%i, %j] : memref<42x?xf32>
@@ -192,8 +192,8 @@ func.func @dynamic_load(%dynamic : memref<?x?xf32>, %i : index, %j : index) {
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.load %[[addr]] : !llvm.ptr -> f32
%0 = memref.load %dynamic[%i, %j] : memref<?x?xf32>
@@ -230,8 +230,8 @@ func.func @dynamic_store(%dynamic : memref<?x?xf32>, %i : index, %j : index, %va
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.store %{{.*}}, %[[addr]] : f32, !llvm.ptr
memref.store %val, %dynamic[%i, %j] : memref<?x?xf32>
@@ -247,8 +247,8 @@ func.func @mixed_store(%mixed : memref<42x?xf32>, %i : index, %j : index, %val :
// CHECK-DAG: %[[J:.*]] = builtin.unrealized_conversion_cast %[[Jarg]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %[[ld:.*]][1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK-NEXT: %[[st0:.*]] = llvm.extractvalue %[[ld]][4, 0] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
-// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] : i64
-// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] : i64
+// CHECK-NEXT: %[[offI:.*]] = llvm.mul %[[I]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK-NEXT: %[[off1:.*]] = llvm.add %[[offI]], %[[J]] overflow<nsw, nuw> : i64
// CHECK-NEXT: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK-NEXT: llvm.store %{{.*}}, %[[addr]] : f32, !llvm.ptr
memref.store %val, %mixed[%i, %j] : memref<42x?xf32>
diff --git a/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir b/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir
index b03ac2c20112b..040a27e160557 100644
--- a/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir
+++ b/mlir/test/Conversion/MemRefToLLVM/convert-static-memref-ops.mlir
@@ -138,8 +138,8 @@ func.func @static_load(%static : memref<10x42xf32>, %i : index, %j : index) {
// CHECK-DAG: %[[JJ:.*]] = builtin.unrealized_conversion_cast %[[J]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %{{.*}}[1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK: %[[st0:.*]] = llvm.mlir.constant(42 : index) : i64
-// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] : i64
-// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] : i64
+// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] overflow<nsw, nuw> : i64
// CHECK: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK: llvm.load %[[addr]] : !llvm.ptr -> f32
%0 = memref.load %static[%i, %j] : memref<10x42xf32>
@@ -166,8 +166,8 @@ func.func @static_store(%static : memref<10x42xf32>, %i : index, %j : index, %va
// CHECK-DAG: %[[JJ:.*]] = builtin.unrealized_conversion_cast %[[J]]
// CHECK: %[[ptr:.*]] = llvm.extractvalue %{{.*}}[1] : !llvm.struct<(ptr, ptr, i64, array<2 x i64>, array<2 x i64>)>
// CHECK: %[[st0:.*]] = llvm.mlir.constant(42 : index) : i64
-// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] : i64
-// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] : i64
+// CHECK: %[[offI:.*]] = llvm.mul %[[II]], %[[st0]] overflow<nsw, nuw> : i64
+// CHECK: %[[off1:.*]] = llvm.add %[[offI]], %[[JJ]] overflow<nsw, nuw> : i64
// CHECK: %[[addr:.*]] = llvm.getelementptr inbounds|nuw %[[ptr]][%[[off1]]] : (!llvm.ptr, i64) -> !llvm.ptr, f32
// CHECK: llvm.store %{{.*}}, %[[addr]] : f32, !llvm.ptr
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Now that the GEP no wrap flags are known when lowering to llvm.getelementptr, we can also emit nuw and nsw for the generated llvm.mul and llvm.add when no unsigned wrap and no signed wrap are used respectively.
fixes: iree-org/iree#20483