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llvm-project/clang/test/CodeGen/cleanup-destslot-simple.c
Nikita Popov c23b4fbdbb
[IR] Remove size argument from lifetime intrinsics (#150248) 
Now that #149310 has restricted lifetime intrinsics to only work on
allocas, we can also drop the explicit size argument. Instead, the size
is implied by the alloca.

This removes the ability to only mark a prefix of an alloca alive/dead.
We never used that capability, so we should remove the need to handle
that possibility everywhere (though many key places, including stack
coloring, did not actually respect this).
2025-08-08 11:09:34 +02:00

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// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
// RUN: %clang_cc1 -O1 -triple x86_64-none-linux-gnu -emit-llvm -debug-info-kind=line-tables-only %s -o - | FileCheck %s --check-prefix=CHECK-LIFETIME
// We shouldn't have markers at -O0 or with msan.
// RUN: %clang_cc1 -O0 -triple x86_64-none-linux-gnu -emit-llvm -debug-info-kind=line-tables-only %s -o - | FileCheck %s --check-prefix=CHECK-OPTNONE
// RUN: %clang_cc1 -O1 -triple x86_64-none-linux-gnu -emit-llvm -debug-info-kind=line-tables-only %s -o - -fsanitize=memory | FileCheck %s --check-prefix=CHECK-MSAN
// RUN: %clang_cc1 -O1 -triple x86_64-none-linux-gnu -emit-llvm -debug-info-kind=line-tables-only %s -o - -fsanitize=kernel-memory | FileCheck %s --check-prefix=CHECK-KMSAN
// There is no exception to handle here, lifetime.end is not a destructor,
// so there is no need have cleanup dest slot related code
// CHECK-LIFETIME-LABEL: @test(
// CHECK-LIFETIME-NEXT: entry:
// CHECK-LIFETIME-NEXT: [[X:%.*]] = alloca i32, align 4
// CHECK-LIFETIME-NEXT: [[P:%.*]] = alloca ptr, align 8
// CHECK-LIFETIME-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X]]) #[[ATTR2:[0-9]+]], !dbg [[DBG9:![0-9]+]]
// CHECK-LIFETIME-NEXT: store i32 3, ptr [[X]], align 4, !dbg [[DBG10:![0-9]+]], !tbaa [[TBAA11:![0-9]+]]
// CHECK-LIFETIME-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[P]]), !dbg [[DBG15:![0-9]+]]
// CHECK-LIFETIME-NEXT: store volatile ptr [[X]], ptr [[P]], align 8, !dbg [[DBG16:![0-9]+]], !tbaa [[TBAA17:![0-9]+]]
// CHECK-LIFETIME-NEXT: [[P_0_P_0_P_0_P_0_:%.*]] = load volatile ptr, ptr [[P]], align 8, !dbg [[DBG19:![0-9]+]], !tbaa [[TBAA17]]
// CHECK-LIFETIME-NEXT: [[TMP0:%.*]] = load i32, ptr [[P_0_P_0_P_0_P_0_]], align 4, !dbg [[DBG20:![0-9]+]], !tbaa [[TBAA11]]
// CHECK-LIFETIME-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[P]]), !dbg [[DBG21:![0-9]+]]
// CHECK-LIFETIME-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X]]) #[[ATTR2]], !dbg [[DBG21]]
// CHECK-LIFETIME-NEXT: ret i32 [[TMP0]], !dbg [[DBG22:![0-9]+]]
//
// CHECK-OPTNONE-LABEL: @test(
// CHECK-OPTNONE-NEXT: entry:
// CHECK-OPTNONE-NEXT: [[X:%.*]] = alloca i32, align 4
// CHECK-OPTNONE-NEXT: [[P:%.*]] = alloca ptr, align 8
// CHECK-OPTNONE-NEXT: store i32 3, ptr [[X]], align 4, !dbg [[DBG9:![0-9]+]]
// CHECK-OPTNONE-NEXT: store volatile ptr [[X]], ptr [[P]], align 8, !dbg [[DBG10:![0-9]+]]
// CHECK-OPTNONE-NEXT: [[TMP0:%.*]] = load volatile ptr, ptr [[P]], align 8, !dbg [[DBG11:![0-9]+]]
// CHECK-OPTNONE-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4, !dbg [[DBG12:![0-9]+]]
// CHECK-OPTNONE-NEXT: ret i32 [[TMP1]], !dbg [[DBG13:![0-9]+]]
//
// CHECK-MSAN-LABEL: @test(
// CHECK-MSAN-NEXT: entry:
// CHECK-MSAN-NEXT: [[X:%.*]] = alloca i32, align 4
// CHECK-MSAN-NEXT: [[P:%.*]] = alloca ptr, align 8
// CHECK-MSAN-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X]]) #[[ATTR2:[0-9]+]], !dbg [[DBG9:![0-9]+]]
// CHECK-MSAN-NEXT: [[TMP0:%.*]] = ptrtoint ptr [[X]] to i64, !dbg [[DBG9]]
// CHECK-MSAN-NEXT: [[TMP1:%.*]] = xor i64 [[TMP0]], 87960930222080, !dbg [[DBG9]]
// CHECK-MSAN-NEXT: [[TMP2:%.*]] = inttoptr i64 [[TMP1]] to ptr, !dbg [[DBG9]]
// CHECK-MSAN-NEXT: store i32 0, ptr [[TMP2]], align 4, !dbg [[DBG10:![0-9]+]]
// CHECK-MSAN-NEXT: store i32 3, ptr [[X]], align 4, !dbg [[DBG10]], !tbaa [[TBAA11:![0-9]+]]
// CHECK-MSAN-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[P]]), !dbg [[DBG15:![0-9]+]]
// CHECK-MSAN-NEXT: [[TMP3:%.*]] = ptrtoint ptr [[P]] to i64, !dbg [[DBG15]]
// CHECK-MSAN-NEXT: [[TMP4:%.*]] = xor i64 [[TMP3]], 87960930222080, !dbg [[DBG15]]
// CHECK-MSAN-NEXT: [[TMP5:%.*]] = inttoptr i64 [[TMP4]] to ptr, !dbg [[DBG15]]
// CHECK-MSAN-NEXT: store i64 0, ptr [[TMP5]], align 8, !dbg [[DBG16:![0-9]+]]
// CHECK-MSAN-NEXT: store volatile ptr [[X]], ptr [[P]], align 8, !dbg [[DBG16]], !tbaa [[TBAA17:![0-9]+]]
// CHECK-MSAN-NEXT: [[P_0_P_0_P_0_P_0_:%.*]] = load volatile ptr, ptr [[P]], align 8, !dbg [[DBG19:![0-9]+]], !tbaa [[TBAA17]]
// CHECK-MSAN-NEXT: [[_MSLD:%.*]] = load i64, ptr [[TMP5]], align 8, !dbg [[DBG19]]
// CHECK-MSAN-NEXT: [[_MSCMP_NOT:%.*]] = icmp eq i64 [[_MSLD]], 0, !dbg [[DBG20:![0-9]+]]
// CHECK-MSAN-NEXT: br i1 [[_MSCMP_NOT]], label [[TMP7:%.*]], label [[TMP6:%.*]], !dbg [[DBG20]], !prof [[PROF21:![0-9]+]]
// CHECK-MSAN: 6:
// CHECK-MSAN-NEXT: call void @__msan_warning_noreturn() #[[ATTR3:[0-9]+]], !dbg [[DBG20]]
// CHECK-MSAN-NEXT: unreachable, !dbg [[DBG20]]
// CHECK-MSAN: 7:
// CHECK-MSAN-NEXT: [[TMP8:%.*]] = load i32, ptr [[P_0_P_0_P_0_P_0_]], align 4, !dbg [[DBG20]], !tbaa [[TBAA11]]
// CHECK-MSAN-NEXT: [[TMP9:%.*]] = ptrtoint ptr [[P_0_P_0_P_0_P_0_]] to i64, !dbg [[DBG20]]
// CHECK-MSAN-NEXT: [[TMP10:%.*]] = xor i64 [[TMP9]], 87960930222080, !dbg [[DBG20]]
// CHECK-MSAN-NEXT: [[TMP11:%.*]] = inttoptr i64 [[TMP10]] to ptr, !dbg [[DBG20]]
// CHECK-MSAN-NEXT: [[_MSLD1:%.*]] = load i32, ptr [[TMP11]], align 4, !dbg [[DBG20]]
// CHECK-MSAN-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[P]]), !dbg [[DBG22:![0-9]+]]
// CHECK-MSAN-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X]]) #[[ATTR2]], !dbg [[DBG22]]
// CHECK-MSAN-NEXT: [[_MSCMP2_NOT:%.*]] = icmp eq i32 [[_MSLD1]], 0, !dbg [[DBG23:![0-9]+]]
// CHECK-MSAN-NEXT: br i1 [[_MSCMP2_NOT]], label [[TMP13:%.*]], label [[TMP12:%.*]], !dbg [[DBG23]], !prof [[PROF21]]
// CHECK-MSAN: 12:
// CHECK-MSAN-NEXT: call void @__msan_warning_noreturn() #[[ATTR3]], !dbg [[DBG23]]
// CHECK-MSAN-NEXT: unreachable, !dbg [[DBG23]]
// CHECK-MSAN: 13:
// CHECK-MSAN-NEXT: ret i32 [[TMP8]], !dbg [[DBG23]]
//
// CHECK-KMSAN-LABEL: @test(
// CHECK-KMSAN-NEXT: entry:
// CHECK-KMSAN-NEXT: [[TMP0:%.*]] = call ptr @__msan_get_context_state() #[[ATTR2:[0-9]+]]
// CHECK-KMSAN-NEXT: [[X:%.*]] = alloca i32, align 4
// CHECK-KMSAN-NEXT: [[P:%.*]] = alloca ptr, align 8
// CHECK-KMSAN-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X]]) #[[ATTR2]], !dbg [[DBG9:![0-9]+]]
// CHECK-KMSAN-NEXT: call void @__msan_poison_alloca(ptr nonnull [[X]], i64 4, ptr nonnull @[[GLOB0:[0-9]+]]) #[[ATTR2]], !dbg [[DBG9]]
// CHECK-KMSAN-NEXT: [[TMP1:%.*]] = call { ptr, ptr } @__msan_metadata_ptr_for_store_4(ptr nonnull [[X]]) #[[ATTR2]], !dbg [[DBG10:![0-9]+]]
// CHECK-KMSAN-NEXT: [[TMP2:%.*]] = extractvalue { ptr, ptr } [[TMP1]], 0, !dbg [[DBG10]]
// CHECK-KMSAN-NEXT: store i32 0, ptr [[TMP2]], align 4, !dbg [[DBG10]]
// CHECK-KMSAN-NEXT: store i32 3, ptr [[X]], align 4, !dbg [[DBG10]], !tbaa [[TBAA11:![0-9]+]]
// CHECK-KMSAN-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[P]]), !dbg [[DBG15:![0-9]+]]
// CHECK-KMSAN-NEXT: call void @__msan_poison_alloca(ptr nonnull [[P]], i64 8, ptr nonnull @[[GLOB1:[0-9]+]]) #[[ATTR2]], !dbg [[DBG15]]
// CHECK-KMSAN-NEXT: [[TMP3:%.*]] = call { ptr, ptr } @__msan_metadata_ptr_for_store_8(ptr nonnull [[P]]) #[[ATTR2]], !dbg [[DBG16:![0-9]+]]
// CHECK-KMSAN-NEXT: [[TMP4:%.*]] = extractvalue { ptr, ptr } [[TMP3]], 0, !dbg [[DBG16]]
// CHECK-KMSAN-NEXT: store i64 0, ptr [[TMP4]], align 8, !dbg [[DBG16]]
// CHECK-KMSAN-NEXT: store volatile ptr [[X]], ptr [[P]], align 8, !dbg [[DBG16]], !tbaa [[TBAA17:![0-9]+]]
// CHECK-KMSAN-NEXT: [[P_0_P_0_P_0_P_0_:%.*]] = load volatile ptr, ptr [[P]], align 8, !dbg [[DBG19:![0-9]+]], !tbaa [[TBAA17]]
// CHECK-KMSAN-NEXT: [[TMP5:%.*]] = call { ptr, ptr } @__msan_metadata_ptr_for_load_8(ptr nonnull [[P]]) #[[ATTR2]], !dbg [[DBG19]]
// CHECK-KMSAN-NEXT: [[TMP6:%.*]] = extractvalue { ptr, ptr } [[TMP5]], 0, !dbg [[DBG19]]
// CHECK-KMSAN-NEXT: [[_MSLD:%.*]] = load i64, ptr [[TMP6]], align 8, !dbg [[DBG19]]
// CHECK-KMSAN-NEXT: [[_MSCMP_NOT:%.*]] = icmp eq i64 [[_MSLD]], 0, !dbg [[DBG20:![0-9]+]]
// CHECK-KMSAN-NEXT: br i1 [[_MSCMP_NOT]], label [[TMP10:%.*]], label [[TMP7:%.*]], !dbg [[DBG20]], !prof [[PROF21:![0-9]+]]
// CHECK-KMSAN: 7:
// CHECK-KMSAN-NEXT: [[TMP8:%.*]] = extractvalue { ptr, ptr } [[TMP5]], 1, !dbg [[DBG19]]
// CHECK-KMSAN-NEXT: [[TMP9:%.*]] = load i32, ptr [[TMP8]], align 8, !dbg [[DBG19]]
// CHECK-KMSAN-NEXT: call void @__msan_warning(i32 [[TMP9]]) #[[ATTR3:[0-9]+]], !dbg [[DBG20]]
// CHECK-KMSAN-NEXT: br label [[TMP10]], !dbg [[DBG20]]
// CHECK-KMSAN: 10:
// CHECK-KMSAN-NEXT: [[RETVAL_ORIGIN:%.*]] = getelementptr i8, ptr [[TMP0]], i64 4008
// CHECK-KMSAN-NEXT: [[RETVAL_SHADOW:%.*]] = getelementptr i8, ptr [[TMP0]], i64 800
// CHECK-KMSAN-NEXT: [[TMP11:%.*]] = load i32, ptr [[P_0_P_0_P_0_P_0_]], align 4, !dbg [[DBG20]], !tbaa [[TBAA11]]
// CHECK-KMSAN-NEXT: [[TMP12:%.*]] = call { ptr, ptr } @__msan_metadata_ptr_for_load_4(ptr nonnull [[P_0_P_0_P_0_P_0_]]) #[[ATTR2]], !dbg [[DBG20]]
// CHECK-KMSAN-NEXT: [[TMP13:%.*]] = extractvalue { ptr, ptr } [[TMP12]], 0, !dbg [[DBG20]]
// CHECK-KMSAN-NEXT: [[TMP14:%.*]] = extractvalue { ptr, ptr } [[TMP12]], 1, !dbg [[DBG20]]
// CHECK-KMSAN-NEXT: [[_MSLD1:%.*]] = load i32, ptr [[TMP13]], align 4, !dbg [[DBG20]]
// CHECK-KMSAN-NEXT: [[TMP15:%.*]] = load i32, ptr [[TMP14]], align 4, !dbg [[DBG20]]
// CHECK-KMSAN-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[P]]), !dbg [[DBG22:![0-9]+]]
// CHECK-KMSAN-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X]]) #[[ATTR2]], !dbg [[DBG22]]
// CHECK-KMSAN-NEXT: store i32 [[_MSLD1]], ptr [[RETVAL_SHADOW]], align 8, !dbg [[DBG23:![0-9]+]]
// CHECK-KMSAN-NEXT: store i32 [[TMP15]], ptr [[RETVAL_ORIGIN]], align 4, !dbg [[DBG23]]
// CHECK-KMSAN-NEXT: ret i32 [[TMP11]], !dbg [[DBG23]]
//
int test(void) {
int x = 3;
int *volatile p = &x;
return *p;
}
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