clang/test/CodeGen/builtin-assume-separate-storage.c

   1 // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
   2 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
   3 void *nonconst(void);
   4
   5 // CHECK-LABEL: @test1(
   6 // CHECK-NEXT:  entry:
   7 // CHECK-NEXT:    [[A_ADDR:%.*]] = alloca ptr, align 8
   8 // CHECK-NEXT:    [[B_ADDR:%.*]] = alloca ptr, align 8
   9 // CHECK-NEXT:    store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
  10 // CHECK-NEXT:    store ptr [[B:%.*]], ptr [[B_ADDR]], align 8
  11 // CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[A_ADDR]], align 8
  12 // CHECK-NEXT:    [[TMP1:%.*]] = load ptr, ptr [[B_ADDR]], align 8
  13 // CHECK-NEXT:    call void @llvm.assume(i1 true) [ "separate_storage"(ptr [[TMP0]], ptr [[TMP1]]) ]
  14 // CHECK-NEXT:    ret void
  15 //
  16 void test1(int *a, int *b) {
  17
  18   __builtin_assume_separate_storage(a, b);
  19 }
  20
  21 // Separate storage assumptions evaluate their arguments unconditionally, like
  22 // assume_aligned but *unlike* assume. Check that we actually do so.
  23 // CHECK-LABEL: @test2(
  24 // CHECK-NEXT:  entry:
  25 // CHECK-NEXT:    [[A_ADDR:%.*]] = alloca ptr, align 8
  26 // CHECK-NEXT:    [[B_ADDR:%.*]] = alloca ptr, align 8
  27 // CHECK-NEXT:    store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
  28 // CHECK-NEXT:    store ptr [[B:%.*]], ptr [[B_ADDR]], align 8
  29 // CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[A_ADDR]], align 8
  30 // CHECK-NEXT:    [[CALL:%.*]] = call ptr @nonconst()
  31 // CHECK-NEXT:    call void @llvm.assume(i1 true) [ "separate_storage"(ptr [[TMP0]], ptr [[CALL]]) ]
  32 // CHECK-NEXT:    ret void
  33 //
  34 void test2(int *a, int *b) {
  35   __builtin_assume_separate_storage(a, nonconst());
  36 }