[NFC] Added tests for D66651

llvm-svn: 370046

llvm/test/Transforms/InstCombine/deref-alloc-fns.ll

+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -instcombine  -S < %s | FileCheck %s
+
+declare noalias i8* @malloc(i64)
+declare noalias i8* @calloc(i64, i64)
+declare noalias i8* @realloc(i8* nocapture, i64)
+declare noalias nonnull i8* @_Znam(i64) ; throwing version of 'new'
+
+define noalias i8* @malloc_nonconstant_size(i64 %n) {
+; CHECK-LABEL: @malloc_nonconstant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @malloc(i64 [[N:%.*]])
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @malloc(i64 %n)
+  ret i8* %call
+}
+
+define noalias i8* @malloc_constant_size() {
+; CHECK-LABEL: @malloc_constant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @malloc(i64 40)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @malloc(i64 40)
+  ret i8* %call
+}
+
+define noalias i8* @malloc_constant_size2() {
+; CHECK-LABEL: @malloc_constant_size2(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias dereferenceable_or_null(80) i8* @malloc(i64 40)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias dereferenceable_or_null(80) i8* @malloc(i64 40)
+  ret i8* %call
+}
+
+define noalias i8* @malloc_constant_size3() {
+; CHECK-LABEL: @malloc_constant_size3(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias dereferenceable(80) i8* @malloc(i64 40)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias dereferenceable(80) i8* @malloc(i64 40)
+  ret i8* %call
+}
+
+
+define noalias i8* @malloc_constant_zero_size() {
+; CHECK-LABEL: @malloc_constant_zero_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @malloc(i64 0)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @malloc(i64 0)
+  ret i8* %call
+}
+
+define noalias i8* @realloc_nonconstant_size(i8* %p, i64 %n) {
+; CHECK-LABEL: @realloc_nonconstant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @realloc(i8* [[P:%.*]], i64 [[N:%.*]])
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @realloc(i8* %p, i64 %n)
+  ret i8* %call
+}
+
+define noalias i8* @realloc_constant_zero_size(i8* %p) {
+; CHECK-LABEL: @realloc_constant_zero_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @realloc(i8* [[P:%.*]], i64 0)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @realloc(i8* %p, i64 0)
+  ret i8* %call
+}
+
+define noalias i8* @realloc_constant_size(i8* %p) {
+; CHECK-LABEL: @realloc_constant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @realloc(i8* [[P:%.*]], i64 40)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @realloc(i8* %p, i64 40)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_nonconstant_size(i64 %n) {
+; CHECK-LABEL: @calloc_nonconstant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 1, i64 [[N:%.*]])
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 1, i64 %n)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_nonconstant_size2(i64 %n) {
+; CHECK-LABEL: @calloc_nonconstant_size2(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 [[N:%.*]], i64 0)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 %n, i64 0)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_nonconstant_size3(i64 %n) {
+; CHECK-LABEL: @calloc_nonconstant_size3(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 [[N:%.*]], i64 [[N]])
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 %n, i64 %n)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_constant_zero_size() {
+; CHECK-LABEL: @calloc_constant_zero_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 0, i64 0)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 0, i64 0)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_constant_zero_size2(i64 %n) {
+; CHECK-LABEL: @calloc_constant_zero_size2(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 [[N:%.*]], i64 0)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 %n, i64 0)
+  ret i8* %call
+}
+
+
+define noalias i8* @calloc_constant_zero_size3(i64 %n) {
+; CHECK-LABEL: @calloc_constant_zero_size3(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 0, i64 [[N:%.*]])
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 0, i64 %n)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_constant_size() {
+; CHECK-LABEL: @calloc_constant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 16, i64 8)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 16, i64 8)
+  ret i8* %call
+}
+
+define noalias i8* @calloc_constant_size_overflow() {
+; CHECK-LABEL: @calloc_constant_size_overflow(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call noalias i8* @calloc(i64 2000000000000, i64 80000000000)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call noalias i8* @calloc(i64 2000000000000, i64 80000000000)
+  ret i8* %call
+}
+
+
+define noalias i8* @op_new_nonconstant_size(i64 %n) {
+; CHECK-LABEL: @op_new_nonconstant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @_Znam(i64 [[N:%.*]])
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call i8* @_Znam(i64 %n)
+  ret i8* %call
+}
+
+define noalias i8* @op_new_constant_zero_size() {
+; CHECK-LABEL: @op_new_constant_zero_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @_Znam(i64 40)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call i8* @_Znam(i64 40)
+  ret i8* %call
+}
+
+define noalias i8* @op_new_constant_size() {
+; CHECK-LABEL: @op_new_constant_size(
+; CHECK-NEXT:    [[CALL:%.*]] = tail call i8* @_Znam(i64 0)
+; CHECK-NEXT:    ret i8* [[CALL]]
+;
+  %call = tail call i8* @_Znam(i64 0)
+  ret i8* %call
+}