1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=1 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-1-SCALAR
2 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=2 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-2-ARRAY
3 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=3 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-3-VLA
4 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=4 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-4-POINTER
5 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=5 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-5-BUILTIN
6 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=1 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-1-SCALAR
7 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=2 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-2-ARRAY
8 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=3 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-3-VLA
9 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=4 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-4-POINTER
10 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=5 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-5-BUILTIN
11
12 #define ARRLEN 10
13
14 typedef struct {
15 int i;
16 char c;
17 } S;
18
foo(unsigned n)19 int foo(unsigned n) {
20 // scalar variable
21 long a;
22 // array
23 S arr[ARRLEN];
24 // VLA
25 S vla[n];
26 // pointer
27 void *p;
28 // builtin
29 p = __builtin_alloca(sizeof(unsigned long long) * n);
30 // PATTERN-STOP-AFTER-1-SCALAR: store i64 -6148914691236517206, ptr %a, align 8
31 // PATTERN-STOP-AFTER-1-SCALAR-NOT: call void @llvm.memset.p0.i64(ptr align 16 %0, i8 -86, i64 80, i1 false)
32 // PATTERN-STOP-AFTER-2-ARRAY: call void @llvm.memset.p0.i64(ptr align 16 %arr, i8 -86, i64 80, i1 false)
33 // PATTERN-STOP-AFTER-2-ARRAY-NOT: vla-init.loop:
34 // PATTERN-STOP-AFTER-3-VLA: vla-init.loop:
35 // PATTERN-STOP-AFTER-3-VLA-NEXT: %vla.cur = phi ptr [ %vla, %vla-setup.loop ], [ %vla.next, %vla-init.loop ]
36 // PATTERN-STOP-AFTER-3-VLA-NEXT-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %vla.cur, ptr align 4 @__const._Z3fooj.vla, i64 8, i1 false)
37 // PATTERN-STOP-AFTER-3-VLA-NOT: store ptr inttoptr (i64 -6148914691236517206 to ptr), ptr %p, align 8
38 // PATTERN-STOP-AFTER-4-POINTER: store ptr inttoptr (i64 -6148914691236517206 to ptr), ptr %p, align 8
39 // PATTERN-STOP-AFTER-4-POINTER-NOT: call void @llvm.memset.p0.i64(ptr align 16 %5, i8 -86, i64 %mul, i1 false)
40 // PATTERN-STOP-AFTER-5-BUILTIN: call void @llvm.memset.p0.i64(ptr align 16 %5, i8 -86, i64 %mul, i1 false)
41 // PATTERN-STOP-AFTER-5-BUILTIN-MESSAGES: warning: -ftrivial-auto-var-init-stop-after=5 has been enabled to limit the number of times ftrivial-auto-var-init=pattern gets applied.
42
43 // ZERO-STOP-AFTER-1-SCALAR: store i64 0, ptr %a, align 8
44 // ZERO-STOP-AFTER-1-SCALAR-NOT: call void @llvm.memset.p0.i64(ptr align 16 %arr, i8 0, i64 80, i1 false)
45 // ZERO-STOP-AFTER-2-ARRAY: call void @llvm.memset.p0.i64(ptr align 16 %arr, i8 0, i64 80, i1 false)
46 // ZERO-STOP-AFTER-2-ARRAY-NOT: %call void @llvm.memset.p0.i64(ptr align 16 %3, i8 0, i64 %2, i1 false)
47 // ZERO-STOP-AFTER-3-VLA: call void @llvm.memset.p0.i64(ptr align 16 %vla, i8 0, i64 %3, i1 false)
48 // ZERO-STOP-AFTER-3-VLA-NOT: store ptr null, ptr %p, align 8
49 // ZERO-STOP-AFTER-4-POINTER: store ptr null, ptr %p, align 8
50 // ZERO-STOP-AFTER-4-POINTER-NOT: call void @llvm.memset.p0.i64(ptr align 16 %4, i8 0, i64 %mul, i1 false)
51 // ZERO-STOP-AFTER-5-BUILTIN: %5 = alloca i8, i64 %mul, align 16
52 // ZERO-STOP-AFTER-5-BUILTIN-NEXT: call void @llvm.memset.p0.i64(ptr align 16 %5, i8 0, i64 %mul, i1 false)
53 // ZERO-STOP-AFTER-5-BUILTIN-MESSAGES: warnings: -ftrivial-auto-var-init-stop-after=5 has been enabled to limit the number of times ftrivial-auto-var-init=zero gets applied.
54 return 0;
55 }
56