[llvm] r357013 - [InstCombine] Add tests for ssubo X, C -> saddo X, -C; NFC
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Tue Mar 26 11:05:43 PDT 2019
Author: nikic
Date: Tue Mar 26 11:05:43 2019
New Revision: 357013
URL: http://llvm.org/viewvc/llvm-project?rev=357013&view=rev
Log:
[InstCombine] Add tests for ssubo X, C -> saddo X, -C; NFC
Add baseline tests for canonicalization of
ssubo X, C -> saddo X, -C.
Patch by Dan Robertson.
Differential Revision: https://reviews.llvm.org/D59653
Added:
llvm/trunk/test/Transforms/InstCombine/ssub-with-overflow.ll
Modified:
llvm/trunk/test/Transforms/InstCombine/sadd-with-overflow.ll
Modified: llvm/trunk/test/Transforms/InstCombine/sadd-with-overflow.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/sadd-with-overflow.ll?rev=357013&r1=357012&r2=357013&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/sadd-with-overflow.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/sadd-with-overflow.ll Tue Mar 26 11:05:43 2019
@@ -111,3 +111,13 @@ define { i32, i1 } @no_fold_wrapped_add(
%b = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 30, i32 %a)
ret { i32, i1 } %b
}
+
+define { i32, i1 } @fold_sub_simple(i32 %x) {
+; CHECK-LABEL: @fold_sub_simple(
+; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[X:%.*]], i32 42)
+; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
+;
+ %a = sub nsw i32 %x, -12
+ %b = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %a, i32 30)
+ ret { i32, i1 } %b
+}
Added: llvm/trunk/test/Transforms/InstCombine/ssub-with-overflow.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/ssub-with-overflow.ll?rev=357013&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/ssub-with-overflow.ll (added)
+++ llvm/trunk/test/Transforms/InstCombine/ssub-with-overflow.ll Tue Mar 26 11:05:43 2019
@@ -0,0 +1,167 @@
+; 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.ssub.with.overflow.v2i32(<2 x i32>, <2 x i32>)
+
+declare { <2 x i8>, <2 x i1> } @llvm.ssub.with.overflow.v2i8(<2 x i8>, <2 x i8>)
+
+declare { i32, i1 } @llvm.ssub.with.overflow.i32(i32, i32)
+
+declare { i8, i1 } @llvm.ssub.with.overflow.i8(i8, i8)
+
+define { i32, i1 } @simple_fold(i32 %x) {
+; CHECK-LABEL: @simple_fold(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -7
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 [[A]], i32 13)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = sub nsw i32 %x, 7
+ %b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 13)
+ ret { i32, i1 } %b
+}
+
+define { i32, i1 } @fold_mixed_signs(i32 %x) {
+; CHECK-LABEL: @fold_mixed_signs(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -13
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 [[A]], i32 -7)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = sub nsw i32 %x, 13
+ %b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 -7)
+ ret { i32, i1 } %b
+}
+
+define { i8, i1 } @fold_on_constant_sub_no_overflow(i8 %x) {
+; CHECK-LABEL: @fold_on_constant_sub_no_overflow(
+; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], -100
+; CHECK-NEXT: [[B:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[A]], i8 28)
+; CHECK-NEXT: ret { i8, i1 } [[B]]
+;
+ %a = sub nsw i8 %x, 100
+ %b = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %a, i8 28)
+ ret { i8, i1 } %b
+}
+
+define { i8, i1 } @no_fold_on_constant_sub_overflow(i8 %x) {
+; CHECK-LABEL: @no_fold_on_constant_sub_overflow(
+; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], -100
+; CHECK-NEXT: [[B:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[A]], i8 29)
+; CHECK-NEXT: ret { i8, i1 } [[B]]
+;
+ %a = sub nsw i8 %x, 100
+ %b = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %a, i8 29)
+ ret { i8, 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 nsw <2 x i32> [[X:%.*]], <i32 -12, i32 -12>
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.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 = sub nsw <2 x i32> %x, <i32 12, i32 12>
+ %b = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.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 <2 x i32> [[X:%.*]], <i32 -12, i32 undef>
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.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 = sub nsw <2 x i32> %x, <i32 12, i32 undef>
+ %b = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.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:%.*]] = sub nsw <2 x i32> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[B:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.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 = sub nsw <2 x i32> %x, %y
+ %b = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.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 nsw i32 [[X:%.*]], -12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 [[A]], i32 30)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = sub nuw nsw i32 %x, 12
+ %b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 30)
+ ret { i32, i1 } %b
+}
+
+define { i32, i1 } @no_fold_nuw(i32 %x) {
+; CHECK-LABEL: @no_fold_nuw(
+; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], -12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 [[A]], i32 30)
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = sub nuw i32 %x, 12
+ %b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 30)
+ ret { i32, i1 } %b
+}
+
+define { i32, i1 } @no_fold_wrapped_sub(i32 %x) {
+; CHECK-LABEL: @no_fold_wrapped_sub(
+; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], -12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 30, i32 [[A]])
+; CHECK-NEXT: ret { i32, i1 } [[B]]
+;
+ %a = sub i32 %x, 12
+ %b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 30, i32 %a)
+ ret { i32, i1 } %b
+}
+
+define { i32, i1 } @fold_add_simple(i32 %x) {
+; CHECK-LABEL: @fold_add_simple(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -12
+; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.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.ssub.with.overflow.i32(i32 %a, i32 30)
+ ret { i32, i1 } %b
+}
+
+define { <2 x i32>, <2 x i1> } @keep_ssubo_undef(<2 x i32> %x) {
+; CHECK-LABEL: @keep_ssubo_undef(
+; CHECK-NEXT: [[A:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 30, i32 undef>)
+; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[A]]
+;
+ %a = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %x, <2 x i32> <i32 30, i32 undef>)
+ ret { <2 x i32>, <2 x i1> } %a
+}
+
+define { <2 x i32>, <2 x i1> } @keep_ssubo_non_splat(<2 x i32> %x) {
+; CHECK-LABEL: @keep_ssubo_non_splat(
+; CHECK-NEXT: [[A:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 30, i32 31>)
+; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[A]]
+;
+ %a = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %x, <2 x i32> <i32 30, i32 31>)
+ ret { <2 x i32>, <2 x i1> } %a
+}
+
+define { <2 x i8>, <2 x i1> } @keep_ssubo_one_element_is_128(<2 x i8> %x) {
+; CHECK-LABEL: @keep_ssubo_one_element_is_128(
+; CHECK-NEXT: [[A:%.*]] = tail call { <2 x i8>, <2 x i1> } @llvm.ssub.with.overflow.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 0, i8 -128>)
+; CHECK-NEXT: ret { <2 x i8>, <2 x i1> } [[A]]
+;
+ %a = tail call { <2 x i8>, <2 x i1> } @llvm.ssub.with.overflow.v2i8(<2 x i8> %x, <2 x i8> <i8 0, i8 -128>)
+ ret { <2 x i8>, <2 x i1> } %a
+}
+
+define { i8, i1 } @keep_ssubo_128(i8 %x) {
+; CHECK-LABEL: @keep_ssubo_128(
+; CHECK-NEXT: [[A:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 -128)
+; CHECK-NEXT: ret { i8, i1 } [[A]]
+;
+ %a = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %x, i8 -128)
+ ret { i8, i1 } %a
+}
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