1 | // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s |
2 | // RUN: %clang_cc1 -triple i386-mingw32 -fms-extensions -emit-llvm -o - %s | FileCheck %s |
3 | |
4 | int nonconst(void); |
5 | int isconst(void) __attribute__((const)); |
6 | int ispure(void) __attribute__((pure)); |
7 | |
8 | // CHECK-LABEL: @test1 |
9 | int test1(int *a, int i) { |
10 | // CHECK: store i32* %a, i32** [[A_ADDR:%.+]], align |
11 | // CHECK: [[A:%.+]] = load i32*, i32** [[A_ADDR]] |
12 | // CHECK: [[CMP:%.+]] = icmp ne i32* [[A]], null |
13 | // CHECK: call void @llvm.assume(i1 [[CMP]]) |
14 | |
15 | // CHECK: [[CALL:%.+]] = call i32 @isconst() |
16 | // CHECK: [[BOOL:%.+]] = icmp ne i32 [[CALL]], 0 |
17 | // CHECK: call void @llvm.assume(i1 [[BOOL]]) |
18 | |
19 | // CHECK: [[CALLPURE:%.+]] = call i32 @ispure() |
20 | // CHECK: [[BOOLPURE:%.+]] = icmp ne i32 [[CALLPURE]], 0 |
21 | // CHECK: call void @llvm.assume(i1 [[BOOLPURE]]) |
22 | #ifdef _MSC_VER |
23 | __assume(a != 0) |
24 | __assume(isconst()); |
25 | __assume(ispure()); |
26 | #else |
27 | __builtin_assume(a != 0); |
28 | __builtin_assume(isconst()); |
29 | __builtin_assume(ispure()); |
30 | #endif |
31 | |
32 | // Nothing is generated for an assume with side effects... |
33 | // CHECK-NOT: load i32*, i32** %i.addr |
34 | // CHECK-NOT: call void @llvm.assume |
35 | // CHECK-NOT: call i32 @nonconst() |
36 | #ifdef _MSC_VER |
37 | __assume(++i != 0) |
38 | __assume(nonconst()); |
39 | #else |
40 | __builtin_assume(++i != 0); |
41 | __builtin_assume(nonconst()); |
42 | #endif |
43 | |
44 | return a[0]; |
45 | } |
46 | |
47 | |