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llvm-project/clang/test/CodeGenCXX/auto-var-init-stop-after.cpp

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[OpaquePtrs][Clang] Add -no-opaque-pointers to tests (NFC) This adds -no-opaque-pointers to clang tests whose output will change when opaque pointers are enabled by default. This is intended to be part of the migration approach described in https://discourse.llvm.org/t/enabling-opaque-pointers-by-default/61322/9. The patch has been produced by replacing %clang_cc1 with %clang_cc1 -no-opaque-pointers for tests that fail with opaque pointers enabled. Worth noting that this doesn't cover all tests, there's a remaining ~40 tests not using %clang_cc1 that will need a followup change. Differential Revision: https://reviews.llvm.org/D123115
2022-04-07 18:03:55 +08:00
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
// RUN: %clang_cc1 -no-opaque-pointers -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
Add a flag to debug automatic variable initialization Summary: Add -ftrivial-auto-var-init-stop-after= to limit the number of times stack variables are initialized when -ftrivial-auto-var-init= is used to initialize stack variables to zero or a pattern. This flag can be used to bisect uninitialized uses of a stack variable exposed by automatic variable initialization, such as http://crrev.com/c/2020401. Reviewers: jfb, vitalybuka, kcc, glider, rsmith, rjmccall, pcc, eugenis, vlad.tsyrklevich Reviewed By: jfb Subscribers: phosek, hubert.reinterpretcast, srhines, MaskRay, george.burgess.iv, dexonsmith, inglorion, gbiv, llozano, manojgupta, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D77168
2020-06-09 02:53:23 +08:00
#define ARRLEN 10
typedef struct {
int i;
char c;
} S;
int foo(unsigned n) {
// scalar variable
long a = 888;
// array
S arr[ARRLEN];
// VLA
S vla[n];
// pointer
void *p;
// builtin
p = __builtin_alloca(sizeof(unsigned long long) * n);
// PATTERN-STOP-AFTER-1-SCALAR: store i64 -6148914691236517206, i64* %a, align 8
// PATTERN-STOP-AFTER-1-SCALAR-NOT: call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 -86, i64 80, i1 false)
// PATTERN-STOP-AFTER-2-ARRAY: %0 = bitcast [10 x %struct.S]* %arr to i8*
// PATTERN-STOP-AFTER-2-ARRAY-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 -86, i64 80, i1 false)
// PATTERN-STOP-AFTER-2-ARRAY-NOT: vla-init.loop:
// PATTERN-STOP-AFTER-3-VLA: vla-init.loop:
// PATTERN-STOP-AFTER-3-VLA-NEXT: %vla.cur = phi i8* [ %vla.begin, %vla-setup.loop ], [ %vla.next, %vla-init.loop ]
// PATTERN-STOP-AFTER-3-VLA-NEXT-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %vla.cur, i8* align 4 bitcast ({ i32, i8, [3 x i8] }* @__const._Z3fooj.vla to i8*), i64 8, i1 false)
// PATTERN-STOP-AFTER-3-VLA-NOT: store i8* inttoptr (i64 -6148914691236517206 to i8*), i8** %p, align 8
// PATTERN-STOP-AFTER-4-POINTER: store i8* inttoptr (i64 -6148914691236517206 to i8*), i8** %p, align 8
// PATTERN-STOP-AFTER-4-POINTER-NOT: call void @llvm.memset.p0i8.i64(i8* align 16 %6, i8 -86, i64 %mul, i1 false)
// PATTERN-STOP-AFTER-5-BUILTIN: call void @llvm.memset.p0i8.i64(i8* align 16 %6, i8 -86, i64 %mul, i1 false)
// 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.
// ZERO-STOP-AFTER-1-SCALAR: store i64 0, i64* %a, align 8
// ZERO-STOP-AFTER-1-SCALAR-NOT: call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 0, i64 80, i1 false)
// ZERO-STOP-AFTER-2-ARRAY: %0 = bitcast [10 x %struct.S]* %arr to i8*
// ZERO-STOP-AFTER-2-ARRAY-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 0, i64 80, i1 false)
// ZERO-STOP-AFTER-2-ARRAY-NOT: %call void @llvm.memset.p0i8.i64(i8* align 16 %5, i8 0, i64 %4, i1 false)
// ZERO-STOP-AFTER-3-VLA: %5 = bitcast %struct.S* %vla to i8*
// ZERO-STOP-AFTER-3-VLA-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 %5, i8 0, i64 %4, i1 false)
// ZERO-STOP-AFTER-3-VLA-NOT: store i8* null, i8** %p, align 8
// ZERO-STOP-AFTER-4-POINTER: store i8* null, i8** %p, align 8
// ZERO-STOP-AFTER-4-POINTER-NOT: call void @llvm.memset.p0i8.i64(i8* align 16 %7, i8 0, i64 %mul, i1 false)
// ZERO-STOP-AFTER-5-BUILTIN: %7 = alloca i8, i64 %mul, align 16
// ZERO-STOP-AFTER-5-BUILTIN-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 %7, i8 0, i64 %mul, i1 false)
// 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.
return 0;
}