[llvm] r337543 - [NFC][testcases] more testcases for folding srem if its two operands are negatived.

[Chen Zheng via llvm-commits]

Author: shchenz
Date: Fri Jul 20 05:53:45 2018
New Revision: 337543

URL: http://llvm.org/viewvc/llvm-project?rev=337543&view=rev
Log:
[NFC][testcases] more testcases for folding srem if its two operands are negatived.


Modified:
    llvm/trunk/test/Transforms/InstSimplify/srem.ll

Modified: llvm/trunk/test/Transforms/InstSimplify/srem.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstSimplify/srem.ll?rev=337543&r1=337542&r2=337543&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstSimplify/srem.ll (original)
+++ llvm/trunk/test/Transforms/InstSimplify/srem.ll Fri Jul 20 05:53:45 2018
@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -instsimplify -S | FileCheck %s
 
 define i32 @negated_operand(i32 %x) {
@@ -47,3 +48,36 @@ define <2 x i32> @knownnegation_commute_
   %rem = srem <2 x i32> %xy, %yx
   ret <2 x i32> %rem
 }
+
+define <3 x i32> @negated_operand_vec_undef(<3 x i32> %x) {
+; CHECK-LABEL: @negated_operand_vec_undef(
+; CHECK-NEXT:    [[NEGX:%.*]] = sub <3 x i32> <i32 0, i32 undef, i32 0>, [[X:%.*]]
+; CHECK-NEXT:    [[REM:%.*]] = srem <3 x i32> [[NEGX]], [[X]]
+; CHECK-NEXT:    ret <3 x i32> [[REM]]
+;
+  %negx = sub <3 x i32> <i32 0, i32 undef, i32 0>, %x
+  %rem = srem <3 x i32> %negx, %x
+  ret <3 x i32> %rem
+}
+
+define <2 x i32> @negated_operand_vec_nonsplat(<2 x i32> %x) {
+; CHECK-LABEL: @negated_operand_vec_nonsplat(
+; CHECK-NEXT:    [[NEGX:%.*]] = sub <2 x i32> <i32 0, i32 1>, [[X:%.*]]
+; CHECK-NEXT:    [[REM:%.*]] = srem <2 x i32> [[NEGX]], [[X]]
+; CHECK-NEXT:    ret <2 x i32> [[REM]]
+;
+  %negx = sub <2 x i32> <i32 0, i32 1>, %x ; not 0, don't fold
+  %rem = srem <2 x i32> %negx, %x
+  ret <2 x i32> %rem
+}
+
+define i32 @negated_operand_commute(i32 %x) {
+; CHECK-LABEL: @negated_operand_commute(
+; CHECK-NEXT:    [[NEGX:%.*]] = sub i32 0, [[X:%.*]]
+; CHECK-NEXT:    [[REM:%.*]] = srem i32 [[X]], [[NEGX]]
+; CHECK-NEXT:    ret i32 [[REM]]
+;
+  %negx = sub i32 0, %x
+  %rem = srem i32 %x, %negx
+  ret i32 %rem
+}