[NFC][InstSimplify] rewrite test added in r371537 to use non-null pointer instead

I only want to ensure that %offset is non-zero there,
it doesn't matter how that info is conveyed.
As filed in PR43267, the assumption way does not work.

llvm-svn: 371546

diff --git a/llvm/test/Transforms/InstSimplify/result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll b/llvm/test/Transforms/InstSimplify/result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll
index 5a64daf..38538ff 100644 (file)
--- a/llvm/test/Transforms/InstSimplify/result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll
+++ b/llvm/test/Transforms/InstSimplify/result-of-usub-by-nonzero-is-non-zero-and-no-overflow.ll
@@ -5,80 +5,90 @@
 ; that the result is non-zero. This can be simplified just to a comparison
 ; between the base and offset.
 
-declare void @llvm.assume(i1)
-
-define i1 @t0(i8 %base, i8 %offset) {
+define i1 @t0(i64 %base, i64* nonnull %offsetptr) {
 ; CHECK-LABEL: @t0(
-; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i8 [[OFFSET:%.*]], 0
-; CHECK-NEXT:    call void @llvm.assume(i1 [[CMP]])
-; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET]]
-; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[ADJUSTED]], [[BASE]]
-; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
+; CHECK-NEXT:    [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
+; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
+; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp uge i64 [[ADJUSTED]], [[BASE]]
+; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp ne i64 [[ADJUSTED]], 0
 ; CHECK-NEXT:    [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
-  %cmp = icmp ne i8 %offset, 0
-  call void @llvm.assume(i1 %cmp)
+  %offset = ptrtoint i64* %offsetptr to i64
 
-  %adjusted = sub i8 %base, %offset
-  %no_underflow = icmp uge i8 %adjusted, %base
-  %not_null = icmp ne i8 %adjusted, 0
+  %adjusted = sub i64 %base, %offset
+  %no_underflow = icmp uge i64 %adjusted, %base
+  %not_null = icmp ne i64 %adjusted, 0
   %r = and i1 %not_null, %no_underflow
   ret i1 %r
 }
 
-define i1 @t1(i8 %base, i8 %offset) {
+define i1 @t1(i64 %base, i64* nonnull %offsetptr) {
 ; CHECK-LABEL: @t1(
-; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i8 [[OFFSET:%.*]], 0
-; CHECK-NEXT:    call void @llvm.assume(i1 [[CMP]])
-; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET]]
-; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
-; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
+; CHECK-NEXT:    [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
+; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
+; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp ult i64 [[ADJUSTED]], [[BASE]]
+; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp eq i64 [[ADJUSTED]], 0
 ; CHECK-NEXT:    [[R:%.*]] = or i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
-  %cmp = icmp ne i8 %offset, 0
-  call void @llvm.assume(i1 %cmp)
+  %offset = ptrtoint i64* %offsetptr to i64
 
-  %adjusted = sub i8 %base, %offset
-  %no_underflow = icmp ult i8 %adjusted, %base
-  %not_null = icmp eq i8 %adjusted, 0
+  %adjusted = sub i64 %base, %offset
+  %no_underflow = icmp ult i64 %adjusted, %base
+  %not_null = icmp eq i64 %adjusted, 0
   %r = or i1 %not_null, %no_underflow
   ret i1 %r
 }
 
-define i1 @t2_commutative(i8 %base, i8 %offset) {
+define i1 @t2_commutative(i64 %base, i64* nonnull %offsetptr) {
 ; CHECK-LABEL: @t2_commutative(
-; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i8 [[OFFSET:%.*]], 0
-; CHECK-NEXT:    call void @llvm.assume(i1 [[CMP]])
-; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET]]
-; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[ADJUSTED]]
-; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
+; CHECK-NEXT:    [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
+; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
+; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp ule i64 [[BASE]], [[ADJUSTED]]
+; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp ne i64 [[ADJUSTED]], 0
 ; CHECK-NEXT:    [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
-  %cmp = icmp ne i8 %offset, 0
-  call void @llvm.assume(i1 %cmp)
+  %offset = ptrtoint i64* %offsetptr to i64
 
-  %adjusted = sub i8 %base, %offset
-  %no_underflow = icmp ule i8 %base, %adjusted
-  %not_null = icmp ne i8 %adjusted, 0
+  %adjusted = sub i64 %base, %offset
+  %no_underflow = icmp ule i64 %base, %adjusted
+  %not_null = icmp ne i64 %adjusted, 0
   %r = and i1 %not_null, %no_underflow
   ret i1 %r
 }
 
+define i1 @t3_commutative(i64 %base, i64* nonnull %offsetptr) {
+; CHECK-LABEL: @t3_commutative(
+; CHECK-NEXT:    [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
+; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
+; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp ugt i64 [[BASE]], [[ADJUSTED]]
+; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp eq i64 [[ADJUSTED]], 0
+; CHECK-NEXT:    [[R:%.*]] = or i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %offset = ptrtoint i64* %offsetptr to i64
+
+  %adjusted = sub i64 %base, %offset
+  %no_underflow = icmp ugt i64 %base, %adjusted
+  %not_null = icmp eq i64 %adjusted, 0
+  %r = or i1 %not_null, %no_underflow
+  ret i1 %r
+}
+
 ; We don't know that offset is non-zero, so we can't fold.
-define i1 @t3_bad(i8 %base, i8 %offset) {
-; CHECK-LABEL: @t3_bad(
-; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
-; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[ADJUSTED]], [[BASE]]
-; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
+define i1 @t4_bad(i64 %base, i64 %offset) {
+; CHECK-LABEL: @t4_bad(
+; CHECK-NEXT:    [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET:%.*]]
+; CHECK-NEXT:    [[NO_UNDERFLOW:%.*]] = icmp uge i64 [[ADJUSTED]], [[BASE]]
+; CHECK-NEXT:    [[NOT_NULL:%.*]] = icmp ne i64 [[ADJUSTED]], 0
 ; CHECK-NEXT:    [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
-  %adjusted = sub i8 %base, %offset
-  %no_underflow = icmp uge i8 %adjusted, %base
-  %not_null = icmp ne i8 %adjusted, 0
+  %adjusted = sub i64 %base, %offset
+  %no_underflow = icmp uge i64 %adjusted, %base
+  %not_null = icmp ne i64 %adjusted, 0
   %r = and i1 %not_null, %no_underflow
   ret i1 %r
 }