[llvm] r356414 - [InstCombine] Add tests for add nuw + uaddo; NFC
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Mon Mar 18 14:35:09 PDT 2019
Author: nikic
Date: Mon Mar 18 14:35:09 2019
New Revision: 356414
URL: http://llvm.org/viewvc/llvm-project?rev=356414&view=rev
Log:
[InstCombine] Add tests for add nuw + uaddo; NFC
Baseline tests for D59471 (InstCombine of `add nuw` and `uaddo` with
constants).
Patch by Dan Robertson.
Differential Revision: https://reviews.llvm.org/D59472
Added:
llvm/trunk/test/Transforms/InstCombine/uadd-with-overflow.ll
Added: llvm/trunk/test/Transforms/InstCombine/uadd-with-overflow.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/uadd-with-overflow.ll?rev=356414&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/uadd-with-overflow.ll (added)
+++ llvm/trunk/test/Transforms/InstCombine/uadd-with-overflow.ll Mon Mar 18 14:35:09 2019
@@ -0,0 +1,131 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+declare { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32>, <2 x i32>)
+
+declare { <2 x i8>, <2 x i1> } @llvm.uadd.with.overflow.v2i8(<2 x i8>, <2 x i8>)
+
+declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32)
+
+declare { i8, i1 } @llvm.uadd.with.overflow.i8(i8, i8)
+
+define { i32, i1 } @simple_fold(i32 %x) {
+; CHECK-LABEL: @simple_fold(
+; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 7
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A]], i32 13)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = add nuw i32 %x, 7
+ %b = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 13)
+ ret { i32, i1 } %b
+}
+
+define { i8, i1 } @fold_on_constant_add_no_overflow(i8 %x) {
+; CHECK-LABEL: @fold_on_constant_add_no_overflow(
+; CHECK-NEXT: [[A:%.*]] = add nuw i8 [[X:%.*]], -56
+; CHECK-NEXT: [[B:%.*]] = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 [[A]], i8 55)
+; CHECK-NEXT: ret { i8, i1 } [[B]]
+;
+ %a = add nuw i8 %x, 200
+ %b = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 55)
+ ret { i8, i1 } %b
+}
+
+define { i8, i1 } @no_fold_on_constant_add_overflow(i8 %x) {
+; CHECK-LABEL: @no_fold_on_constant_add_overflow(
+; CHECK-NEXT: [[A:%.*]] = add nuw i8 [[X:%.*]], -56
+; CHECK-NEXT: [[B:%.*]] = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 [[A]], i8 56)
+; CHECK-NEXT: ret { i8, i1 } [[B]]
+;
+ %a = add nuw i8 %x, 200
+ %b = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 56)
+ ret { i8, i1 } %b
+}
+
+define { <2 x i8>, <2 x i1> } @no_fold_vector_no_overflow(<2 x i8> %x) {
+; CHECK-LABEL: @no_fold_vector_no_overflow(
+; CHECK-NEXT: [[A:%.*]] = add nuw <2 x i8> [[X:%.*]], <i8 -57, i8 -56>
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i8>, <2 x i1> } @llvm.uadd.with.overflow.v2i8(<2 x i8> [[A]], <2 x i8> <i8 55, i8 55>)
+; CHECK-NEXT: ret { <2 x i8>, <2 x i1> } [[B]]
+;
+ %a = add nuw <2 x i8> %x, <i8 199, i8 200>
+ %b = tail call { <2 x i8>, <2 x i1> } @llvm.uadd.with.overflow.v2i8(<2 x i8> %a, <2 x i8> <i8 55, i8 55>)
+ ret { <2 x i8>, <2 x i1> } %b
+}
+
+define { <2 x i8>, <2 x i1> } @no_fold_vector_overflow(<2 x i8> %x) {
+; CHECK-LABEL: @no_fold_vector_overflow(
+; CHECK-NEXT: [[A:%.*]] = add nuw <2 x i8> [[X:%.*]], <i8 -56, i8 -55>
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i8>, <2 x i1> } @llvm.uadd.with.overflow.v2i8(<2 x i8> [[A]], <2 x i8> <i8 55, i8 55>)
+; CHECK-NEXT: ret { <2 x i8>, <2 x i1> } [[B]]
+;
+ %a = add nuw <2 x i8> %x, <i8 200, i8 201>
+ %b = tail call { <2 x i8>, <2 x i1> } @llvm.uadd.with.overflow.v2i8(<2 x i8> %a, <2 x i8> <i8 55, i8 55>)
+ ret { <2 x i8>, <2 x i1> } %b
+}
+
+define { <2 x i32>, <2 x i1> } @fold_simple_splat_constant(<2 x i32> %x) {
+; CHECK-LABEL: @fold_simple_splat_constant(
+; CHECK-NEXT: [[A:%.*]] = add nuw <2 x i32> [[X:%.*]], <i32 12, i32 12>
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> [[A]], <2 x i32> <i32 30, i32 30>)
+; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[B]]
+;
+ %a = add nuw <2 x i32> %x, <i32 12, i32 12>
+ %b = tail call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 30, i32 30>)
+ ret { <2 x i32>, <2 x i1> } %b
+}
+
+define { <2 x i32>, <2 x i1> } @no_fold_splat_undef_constant(<2 x i32> %x) {
+; CHECK-LABEL: @no_fold_splat_undef_constant(
+; CHECK-NEXT: [[A:%.*]] = add nuw <2 x i32> [[X:%.*]], <i32 12, i32 undef>
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> [[A]], <2 x i32> <i32 30, i32 30>)
+; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[B]]
+;
+ %a = add nuw <2 x i32> %x, <i32 12, i32 undef>
+ %b = tail call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 30, i32 30>)
+ ret { <2 x i32>, <2 x i1> } %b
+}
+
+define { <2 x i32>, <2 x i1> } @no_fold_splat_not_constant(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @no_fold_splat_not_constant(
+; CHECK-NEXT: [[A:%.*]] = add nuw <2 x i32> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> [[A]], <2 x i32> <i32 30, i32 30>)
+; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[B]]
+;
+ %a = add nuw <2 x i32> %x, %y
+ %b = tail call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 30, i32 30>)
+ ret { <2 x i32>, <2 x i1> } %b
+}
+
+define { i32, i1 } @fold_nuwnsw(i32 %x) {
+; CHECK-LABEL: @fold_nuwnsw(
+; CHECK-NEXT: [[A:%.*]] = add nuw nsw i32 [[X:%.*]], 12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A]], i32 30)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = add nuw nsw i32 %x, 12
+ %b = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 30)
+ ret { i32, i1 } %b
+}
+
+define { i32, i1 } @no_fold_nsw(i32 %x) {
+; CHECK-LABEL: @no_fold_nsw(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A]], i32 30)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = add nsw i32 %x, 12
+ %b = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 30)
+ ret { i32, i1 } %b
+}
+
+define { i32, i1 } @no_fold_wrapped_add(i32 %x) {
+; CHECK-LABEL: @no_fold_wrapped_add(
+; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], 12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A]], i32 30)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = add i32 %x, 12
+ %b = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 30, i32 %a)
+ ret { i32, i1 } %b
+}
More information about the llvm-commits
mailing list