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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
test1(int * a,int i)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