derek.holloway
7502bf64a4
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245 lines
14 KiB
C
245 lines
14 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 6
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// RUN: %clang_cc1 -triple=x86_64 -std=c99 -Wno-dangling -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK
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// RUN: %clang_cc1 -triple=x86_64 -std=c11 -Wno-dangling -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK
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// RUN: %clang_cc1 -triple=x86_64 -std=c11 -O2 -disable-llvm-passes -Wno-dangling -emit-llvm -o - %s | FileCheck %s --check-prefix=C11-O2
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// Ensure that codegen for temporary lifetimes makes sense.
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struct X { int a[5]; };
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struct X f(void);
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// CHECK-LABEL: define dso_local i32 @func_return(
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// CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[P:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// CHECK-NEXT: call void @f(ptr dead_on_unwind writable sret([[STRUCT_X]]) align 4 [[REF_TMP]])
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// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr [[P]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[P]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4
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// CHECK-NEXT: ret i32 [[TMP1]]
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//
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// C11-O2-LABEL: define dso_local i32 @func_return(
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// C11-O2-SAME: ) #[[ATTR0:[0-9]+]] {
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// C11-O2-NEXT: [[ENTRY:.*:]]
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// C11-O2-NEXT: [[P:%.*]] = alloca ptr, align 8
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// C11-O2-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[P]]) #[[ATTR5:[0-9]+]]
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @f(ptr dead_on_unwind writable sret([[STRUCT_X]]) align 4 [[REF_TMP]])
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// C11-O2-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// C11-O2-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: store ptr [[ARRAYDECAY]], ptr [[P]], align 8, !tbaa [[INTPTR_TBAA6:![0-9]+]]
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// C11-O2-NEXT: [[TMP0:%.*]] = load ptr, ptr [[P]], align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4, !tbaa [[INT_TBAA2:![0-9]+]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[P]]) #[[ATTR5]]
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// C11-O2-NEXT: ret i32 [[TMP1]]
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//
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int func_return(void) {
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int *p = f().a;
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return *p;
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}
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// CHECK-LABEL: define dso_local i32 @ternary(
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// CHECK-SAME: ) #[[ATTR0]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// CHECK-NEXT: [[Q:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: [[DOTCOMPOUNDLITERAL:%.*]] = alloca [[STRUCT_X]], align 4
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// CHECK-NEXT: br i1 true, label %[[COND_TRUE:.*]], label %[[COND_FALSE:.*]]
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// CHECK: [[COND_TRUE]]:
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// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[REF_TMP]], i8 0, i64 20, i1 false)
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// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// CHECK-NEXT: br label %[[COND_END:.*]]
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// CHECK: [[COND_FALSE]]:
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// CHECK-NEXT: call void @f(ptr dead_on_unwind writable sret([[STRUCT_X]]) align 4 [[REF_TMP]])
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// CHECK-NEXT: br label %[[COND_END]]
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// CHECK: [[COND_END]]:
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// CHECK-NEXT: [[A1:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A1]], i64 0, i64 0
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// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8
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// CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[DOTCOMPOUNDLITERAL]], i8 0, i64 20, i1 false)
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// CHECK-NEXT: [[A2:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[DOTCOMPOUNDLITERAL]], i32 0, i32 0
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// CHECK-NEXT: [[A3:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[DOTCOMPOUNDLITERAL]], i32 0, i32 0
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// CHECK-NEXT: [[ARRAYDECAY4:%.*]] = getelementptr inbounds [5 x i32], ptr [[A3]], i64 0, i64 0
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// CHECK-NEXT: store ptr [[ARRAYDECAY4]], ptr [[Q]], align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4
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// CHECK-NEXT: [[TMP2:%.*]] = load ptr, ptr [[Q]], align 8
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// CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP2]], align 4
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// CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP3]]
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// CHECK-NEXT: ret i32 [[ADD]]
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//
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// C11-O2-LABEL: define dso_local i32 @ternary(
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// C11-O2-SAME: ) #[[ATTR0]] {
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// C11-O2-NEXT: [[ENTRY:.*:]]
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// C11-O2-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// C11-O2-NEXT: [[Q:%.*]] = alloca ptr, align 8
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// C11-O2-NEXT: [[DOTCOMPOUNDLITERAL:%.*]] = alloca [[STRUCT_X]], align 4
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: br i1 true, label %[[COND_TRUE:.*]], label %[[COND_FALSE:.*]]
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// C11-O2: [[COND_TRUE]]:
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// C11-O2-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[REF_TMP]], i8 0, i64 20, i1 false)
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// C11-O2-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// C11-O2-NEXT: br label %[[COND_END:.*]]
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// C11-O2: [[COND_FALSE]]:
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// C11-O2-NEXT: call void @f(ptr dead_on_unwind writable sret([[STRUCT_X]]) align 4 [[REF_TMP]])
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// C11-O2-NEXT: br label %[[COND_END]]
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// C11-O2: [[COND_END]]:
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// C11-O2-NEXT: [[A1:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// C11-O2-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A1]], i64 0, i64 0
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// C11-O2-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[Q]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[DOTCOMPOUNDLITERAL]], i8 0, i64 20, i1 false)
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// C11-O2-NEXT: [[A2:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[DOTCOMPOUNDLITERAL]], i32 0, i32 0
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// C11-O2-NEXT: [[A3:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[DOTCOMPOUNDLITERAL]], i32 0, i32 0
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// C11-O2-NEXT: [[ARRAYDECAY4:%.*]] = getelementptr inbounds [5 x i32], ptr [[A3]], i64 0, i64 0
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// C11-O2-NEXT: store ptr [[ARRAYDECAY4]], ptr [[Q]], align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4, !tbaa [[INT_TBAA2]]
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// C11-O2-NEXT: [[TMP2:%.*]] = load ptr, ptr [[Q]], align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP3:%.*]] = load i32, ptr [[TMP2]], align 4, !tbaa [[INT_TBAA2]]
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// C11-O2-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP3]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[Q]]) #[[ATTR5]]
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// C11-O2-NEXT: ret i32 [[ADD]]
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//
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int ternary(void) {
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extern int *p;
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p = (1 ? (struct X){ 0 } : f()).a;
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int *q = 1 ? (struct X){ 0 }.a : f().a;
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return *p + *q;
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}
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// CHECK-LABEL: define dso_local i32 @comma(
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// CHECK-SAME: ) #[[ATTR0]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[X:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X]], align 4
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[REF_TMP]], ptr align 4 [[X]], i64 20, i1 false)
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// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4
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// CHECK-NEXT: ret i32 [[TMP1]]
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//
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// C11-O2-LABEL: define dso_local i32 @comma(
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// C11-O2-SAME: ) #[[ATTR0]] {
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// C11-O2-NEXT: [[ENTRY:.*:]]
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// C11-O2-NEXT: [[X:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// C11-O2-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X]], align 4
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[X]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[REF_TMP]], ptr align 4 [[X]], i64 20, i1 false), !tbaa.struct [[TBAA_STRUCT9:![0-9]+]]
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// C11-O2-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// C11-O2-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// C11-O2-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4, !tbaa [[INT_TBAA2]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[X]]) #[[ATTR5]]
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// C11-O2-NEXT: ret i32 [[TMP1]]
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//
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int comma(void) {
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struct X x;
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extern int *p;
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p = ((void)0, x).a;
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return *p;
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}
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// CHECK-LABEL: define dso_local i32 @cast(
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// CHECK-SAME: ) #[[ATTR0]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[X:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X]], align 4
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[REF_TMP]], ptr align 4 [[X]], i64 20, i1 false)
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// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4
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// CHECK-NEXT: ret i32 [[TMP1]]
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//
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// C11-O2-LABEL: define dso_local i32 @cast(
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// C11-O2-SAME: ) #[[ATTR0]] {
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// C11-O2-NEXT: [[ENTRY:.*:]]
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// C11-O2-NEXT: [[X:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// C11-O2-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X]], align 4
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[X]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[REF_TMP]], ptr align 4 [[X]], i64 20, i1 false), !tbaa.struct [[TBAA_STRUCT9]]
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// C11-O2-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// C11-O2-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// C11-O2-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4, !tbaa [[INT_TBAA2]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[X]]) #[[ATTR5]]
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// C11-O2-NEXT: ret i32 [[TMP1]]
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//
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int cast(void) {
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struct X x;
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extern int *p;
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p = ((struct X)x).a;
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return *p;
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}
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// CHECK-LABEL: define dso_local i32 @assign(
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// CHECK-SAME: ) #[[ATTR0]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[X:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_X]], align 4
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// CHECK-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X]], align 4
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[X]], ptr align 4 [[S]], i64 20, i1 false)
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[REF_TMP]], ptr align 4 [[X]], i64 20, i1 false)
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// CHECK-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// CHECK-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4
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// CHECK-NEXT: ret i32 [[TMP1]]
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//
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// C11-O2-LABEL: define dso_local i32 @assign(
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// C11-O2-SAME: ) #[[ATTR0]] {
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// C11-O2-NEXT: [[ENTRY:.*:]]
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// C11-O2-NEXT: [[X:%.*]] = alloca [[STRUCT_X:%.*]], align 4
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// C11-O2-NEXT: [[S:%.*]] = alloca [[STRUCT_X]], align 4
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// C11-O2-NEXT: [[REF_TMP:%.*]] = alloca [[STRUCT_X]], align 4
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[X]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[S]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.lifetime.start.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[X]], ptr align 4 [[S]], i64 20, i1 false), !tbaa.struct [[TBAA_STRUCT9]]
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// C11-O2-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[REF_TMP]], ptr align 4 [[X]], i64 20, i1 false), !tbaa.struct [[TBAA_STRUCT9]]
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// C11-O2-NEXT: [[A:%.*]] = getelementptr inbounds nuw [[STRUCT_X]], ptr [[REF_TMP]], i32 0, i32 0
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// C11-O2-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i64 0, i64 0
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// C11-O2-NEXT: store ptr [[ARRAYDECAY]], ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[REF_TMP]]) #[[ATTR5]]
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// C11-O2-NEXT: [[TMP0:%.*]] = load ptr, ptr @p, align 8, !tbaa [[INTPTR_TBAA6]]
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// C11-O2-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4, !tbaa [[INT_TBAA2]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[S]]) #[[ATTR5]]
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// C11-O2-NEXT: call void @llvm.lifetime.end.p0(ptr [[X]]) #[[ATTR5]]
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// C11-O2-NEXT: ret i32 [[TMP1]]
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//
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int assign(void) {
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struct X x, s;
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extern int *p;
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p = (x = s).a;
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return *p;
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}
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//.
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// C11-O2: [[INT_TBAA2]] = !{[[META3:![0-9]+]], [[META3]], i64 0}
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// C11-O2: [[META3]] = !{!"int", [[META4:![0-9]+]], i64 0}
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// C11-O2: [[META4]] = !{!"omnipotent char", [[META5:![0-9]+]], i64 0}
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// C11-O2: [[META5]] = !{!"Simple C/C++ TBAA"}
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// C11-O2: [[INTPTR_TBAA6]] = !{[[META7:![0-9]+]], [[META7]], i64 0}
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// C11-O2: [[META7]] = !{!"p1 int", [[META8:![0-9]+]], i64 0}
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// C11-O2: [[META8]] = !{!"any pointer", [[META4]], i64 0}
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// C11-O2: [[TBAA_STRUCT9]] = !{i64 0, i64 20, [[META10:![0-9]+]]}
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// C11-O2: [[META10]] = !{[[META4]], [[META4]], i64 0}
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//.
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