diff options
Diffstat (limited to 'clang/test/CIR/CodeGen/vla.c')
| -rw-r--r-- | clang/test/CIR/CodeGen/vla.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/clang/test/CIR/CodeGen/vla.c b/clang/test/CIR/CodeGen/vla.c new file mode 100644 index 0000000..e2adf45 --- /dev/null +++ b/clang/test/CIR/CodeGen/vla.c @@ -0,0 +1,285 @@ +// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value -fclangir -emit-cir %s -o %t.cir +// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR +// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value -fclangir -emit-llvm %s -o %t-cir.ll +// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM +// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value -emit-llvm %s -o %t.ll +// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG + +void f0(int len) { + int arr[len]; +} + +// CIR: cir.func{{.*}} @f0(%[[LEN_ARG:.*]]: !s32i {{.*}}) +// CIR: %[[LEN_ADDR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["len", init] +// CIR: %[[SAVED_STACK:.*]] = cir.alloca !cir.ptr<!u8i>, !cir.ptr<!cir.ptr<!u8i>>, ["saved_stack"] +// CIR: cir.store{{.*}} %[[LEN_ARG]], %[[LEN_ADDR]] +// CIR: %[[LEN:.*]] = cir.load{{.*}} %[[LEN_ADDR]] +// CIR: %[[LEN_SIZE_T:.*]] = cir.cast integral %[[LEN]] : !s32i -> !u64i +// CIR: %[[STACK_PTR:.*]] = cir.stacksave +// CIR: cir.store{{.*}} %[[STACK_PTR]], %[[SAVED_STACK]] +// CIR: %[[ARR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, %[[LEN_SIZE_T]] : !u64i, ["arr"] +// CIR: %[[STACK_RESTORE_PTR:.*]] = cir.load{{.*}} %[[SAVED_STACK]] +// CIR: cir.stackrestore %[[STACK_RESTORE_PTR]] + +// LLVM: define{{.*}} void @f0(i32 %[[LEN_ARG:.*]]) { +// LLVM: %[[LEN_ADDR:.*]] = alloca i32 +// LLVM: %[[SAVED_STACK:.*]] = alloca ptr +// LLVM: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// LLVM: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// LLVM: %[[LEN_SIZE_T:.*]] = sext i32 %[[LEN]] to i64 +// LLVM: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// LLVM: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// LLVM: %[[ARR:.*]] = alloca i32, i64 %[[LEN_SIZE_T]] +// LLVM: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// LLVM: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +// Note: VLA_EXPR0 below is emitted to capture debug info. + +// OGCG: define{{.*}} void @f0(i32 {{.*}} %[[LEN_ARG:.*]]) +// OGCG: %[[LEN_ADDR:.*]] = alloca i32 +// OGCG: %[[SAVED_STACK:.*]] = alloca ptr +// OGCG: %[[VLA_EXPR0:.*]] = alloca i64 +// OGCG: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// OGCG: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// OGCG: %[[LEN_SIZE_T:.*]] = zext i32 %[[LEN]] to i64 +// OGCG: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// OGCG: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// OGCG: %[[ARR:.*]] = alloca i32, i64 %[[LEN_SIZE_T]] +// OGCG: store i64 %[[LEN_SIZE_T]], ptr %[[VLA_EXPR0]] +// OGCG: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// OGCG: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +void f1(int len) { + int arr[16][len]; +} + +// CIR: cir.func{{.*}} @f1(%[[LEN_ARG:.*]]: !s32i {{.*}}) +// CIR: %[[LEN_ADDR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["len", init] +// CIR: %[[SAVED_STACK:.*]] = cir.alloca !cir.ptr<!u8i>, !cir.ptr<!cir.ptr<!u8i>>, ["saved_stack"] +// CIR: cir.store{{.*}} %[[LEN_ARG]], %[[LEN_ADDR]] +// CIR: %[[SIXTEEN:.*]] = cir.const #cir.int<16> : !s32i +// CIR: %[[SIXTEEN_SIZE_T:.*]] = cir.cast integral %[[SIXTEEN]] : !s32i -> !u64i +// CIR: %[[LEN:.*]] = cir.load{{.*}} %[[LEN_ADDR]] +// CIR: %[[LEN_SIZE_T:.*]] = cir.cast integral %[[LEN]] : !s32i -> !u64i +// CIR: %[[STACK_PTR:.*]] = cir.stacksave +// CIR: cir.store{{.*}} %[[STACK_PTR]], %[[SAVED_STACK]] +// CIR: %[[TOTAL_LEN:.*]] = cir.binop(mul, %[[SIXTEEN_SIZE_T]], %[[LEN_SIZE_T]]) nuw +// CIR: %[[ARR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, %[[TOTAL_LEN]] : !u64i, ["arr"] +// CIR: %[[STACK_RESTORE_PTR:.*]] = cir.load{{.*}} %[[SAVED_STACK]] +// CIR: cir.stackrestore %[[STACK_RESTORE_PTR]] + +// LLVM: define{{.*}} void @f1(i32 %[[LEN_ARG:.*]]) { +// LLVM: %[[LEN_ADDR:.*]] = alloca i32 +// LLVM: %[[SAVED_STACK:.*]] = alloca ptr +// LLVM: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// LLVM: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// LLVM: %[[LEN_SIZE_T:.*]] = sext i32 %[[LEN]] to i64 +// LLVM: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// LLVM: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// LLVM: %[[TOTAL_LEN:.*]] = mul nuw i64 16, %[[LEN_SIZE_T]] +// LLVM: %[[ARR:.*]] = alloca i32, i64 %[[TOTAL_LEN]] +// LLVM: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// LLVM: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +// Note: VLA_EXPR0 below is emitted to capture debug info. + +// OGCG: define{{.*}} void @f1(i32 {{.*}} %[[LEN_ARG:.*]]) +// OGCG: %[[LEN_ADDR:.*]] = alloca i32 +// OGCG: %[[SAVED_STACK:.*]] = alloca ptr +// OGCG: %[[VLA_EXPR0:.*]] = alloca i64 +// OGCG: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// OGCG: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// OGCG: %[[LEN_SIZE_T:.*]] = zext i32 %[[LEN]] to i64 +// OGCG: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// OGCG: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// OGCG: %[[TOTAL_LEN:.*]] = mul nuw i64 16, %[[LEN_SIZE_T]] +// OGCG: %[[ARR:.*]] = alloca i32, i64 %[[TOTAL_LEN]] +// OGCG: store i64 %[[LEN_SIZE_T]], ptr %[[VLA_EXPR0]] +// OGCG: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// OGCG: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +void f2(int len) { + int arr[len + 4]; +} + +// CIR: cir.func{{.*}} @f2(%[[LEN_ARG:.*]]: !s32i {{.*}}) +// CIR: %[[LEN_ADDR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["len", init] +// CIR: %[[SAVED_STACK:.*]] = cir.alloca !cir.ptr<!u8i>, !cir.ptr<!cir.ptr<!u8i>>, ["saved_stack"] +// CIR: cir.store{{.*}} %[[LEN_ARG]], %[[LEN_ADDR]] +// CIR: %[[LEN:.*]] = cir.load{{.*}} %[[LEN_ADDR]] +// CIR: %[[FOUR:.*]] = cir.const #cir.int<4> : !s32i +// CIR: %[[TOTAL_LEN:.*]] = cir.binop(add, %[[LEN]], %[[FOUR]]) nsw : !s32i +// CIR: %[[TOTAL_LEN_SIZE_T:.*]] = cir.cast integral %[[TOTAL_LEN]] : !s32i -> !u64i +// CIR: %[[STACK_PTR:.*]] = cir.stacksave +// CIR: cir.store{{.*}} %[[STACK_PTR]], %[[SAVED_STACK]] +// CIR: %[[ARR:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, %[[TOTAL_LEN_SIZE_T]] : !u64i, ["arr"] +// CIR: %[[STACK_RESTORE_PTR:.*]] = cir.load{{.*}} %[[SAVED_STACK]] +// CIR: cir.stackrestore %[[STACK_RESTORE_PTR]] + +// LLVM: define{{.*}} void @f2(i32 %[[LEN_ARG:.*]]) { +// LLVM: %[[LEN_ADDR:.*]] = alloca i32 +// LLVM: %[[SAVED_STACK:.*]] = alloca ptr +// LLVM: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// LLVM: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// LLVM: %[[TOTAL_LEN:.*]] = add nsw i32 %[[LEN]], 4 +// LLVM: %[[TOTAL_LEN_SIZE_T:.*]] = sext i32 %[[TOTAL_LEN]] to i64 +// LLVM: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// LLVM: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// LLVM: %[[ARR:.*]] = alloca i32, i64 %[[TOTAL_LEN_SIZE_T]] +// LLVM: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// LLVM: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +// Note: VLA_EXPR0 below is emitted to capture debug info. + +// OGCG: define{{.*}} void @f2(i32 {{.*}} %[[LEN_ARG:.*]]) +// OGCG: %[[LEN_ADDR:.*]] = alloca i32 +// OGCG: %[[SAVED_STACK:.*]] = alloca ptr +// OGCG: %[[VLA_EXPR0:.*]] = alloca i64 +// OGCG: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// OGCG: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// OGCG: %[[TOTAL_LEN:.*]] = add nsw i32 %[[LEN]], 4 +// OGCG: %[[TOTAL_LEN_SIZE_T:.*]] = zext i32 %[[TOTAL_LEN]] to i64 +// OGCG: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// OGCG: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// OGCG: %[[ARR:.*]] = alloca i32, i64 %[[TOTAL_LEN_SIZE_T]] +// OGCG: store i64 %[[TOTAL_LEN_SIZE_T]], ptr %[[VLA_EXPR0]] +// OGCG: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// OGCG: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +void f3(unsigned len) { + char s1[len]; + unsigned i = 0u; + while (++i < len) { + char s2[i]; + } +} + +// CIR: cir.func{{.*}} @f3(%[[LEN_ARG:.*]]: !u32i {{.*}}) +// CIR: %[[LEN_ADDR:.*]] = cir.alloca !u32i, !cir.ptr<!u32i>, ["len", init] +// CIR: %[[SAVED_STACK:.*]] = cir.alloca !cir.ptr<!u8i>, !cir.ptr<!cir.ptr<!u8i>>, ["saved_stack"] +// CIR: cir.store{{.*}} %[[LEN_ARG]], %[[LEN_ADDR]] +// CIR: %[[LEN:.*]] = cir.load{{.*}} %[[LEN_ADDR]] +// CIR: %[[LEN_SIZE_T:.*]] = cir.cast integral %[[LEN]] : !u32i -> !u64i +// CIR: %[[STACK_PTR:.*]] = cir.stacksave +// CIR: cir.store{{.*}} %[[STACK_PTR]], %[[SAVED_STACK]] +// CIR: %[[S1:.*]] = cir.alloca !s8i, !cir.ptr<!s8i>, %[[LEN_SIZE_T]] : !u64i, ["s1"] +// CIR: %[[I:.*]] = cir.alloca !u32i, !cir.ptr<!u32i>, ["i", init] +// CIR: %[[ZERO:.*]] = cir.const #cir.int<0> : !u32i +// CIR: cir.store{{.*}} %[[ZERO]], %[[I]] +// CIR: cir.scope { +// CIR: cir.while { +// CIR: %[[CUR_I:.*]] = cir.load{{.*}} %[[I]] +// CIR: %[[NEXT:.*]] = cir.unary(inc, %[[CUR_I]]) +// CIR: cir.store{{.*}} %[[NEXT]], %[[I]] +// CIR: %[[LEN2:.*]] = cir.load{{.*}} %[[LEN_ADDR]] +// CIR: %[[CMP:.*]] = cir.cmp(lt, %[[NEXT]], %[[LEN2]]) +// CIR: cir.condition(%[[CMP]]) +// CIR: } do { +// CIR: cir.scope { +// CIR: %[[SAVED_STACK2:.*]] = cir.alloca !cir.ptr<!u8i>, !cir.ptr<!cir.ptr<!u8i>>, ["saved_stack"] +// CIR: %[[I_LEN:.*]] = cir.load{{.*}} %[[I]] +// CIR: %[[I_LEN_SIZE_T2:.*]] = cir.cast integral %[[I_LEN]] : !u32i -> !u64i +// CIR: %[[STACK_PTR2:.*]] = cir.stacksave +// CIR: cir.store{{.*}} %[[STACK_PTR2]], %[[SAVED_STACK2]] +// CIR: %[[S2:.*]] = cir.alloca !s8i, !cir.ptr<!s8i>, %[[I_LEN_SIZE_T2]] : !u64i, ["s2"] +// CIR: %[[SAVED_RESTORE_PTR2:.*]] = cir.load{{.*}} %[[SAVED_STACK2]] +// CIR: cir.stackrestore %[[SAVED_RESTORE_PTR2]] +// CIR: } +// CIR: cir.yield +// CIR: } +// CIR: } +// CIR: %[[STACK_RESTORE_PTR:.*]] = cir.load{{.*}} %[[SAVED_STACK]] +// CIR: cir.stackrestore %[[STACK_RESTORE_PTR]] + +// LLVM: define{{.*}} void @f3(i32 %[[LEN_ARG:.*]]) { +// LLVM: %[[SAVED_STACK2:.*]] = alloca ptr +// LLVM: %[[LEN_ADDR:.*]] = alloca i32 +// LLVM: %[[SAVED_STACK:.*]] = alloca ptr +// LLVM: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// LLVM: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// LLVM: %[[LEN_SIZE_T:.*]] = zext i32 %[[LEN]] to i64 +// LLVM: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// LLVM: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// LLVM: %[[S1:.*]] = alloca i8, i64 %[[LEN_SIZE_T]] +// LLVM: %[[I:.*]] = alloca i32 +// LLVM: store i32 0, ptr %[[I]] +// LLVM: br label %[[WHILE_START:.*]] +// LLVM: [[WHILE_START]]: +// LLVM: br label %[[WHILE_COND:.*]] +// LLVM: [[WHILE_COND]]: +// LLVM: %[[CUR_I:.*]] = load i32, ptr %[[I]] +// LLVM: %[[NEXT:.*]] = add i32 %[[CUR_I]], 1 +// LLVM: store i32 %[[NEXT]], ptr %[[I]] +// LLVM: %[[LEN2:.*]] = load i32, ptr %[[LEN_ADDR]] +// LLVM: %[[CMP:.*]] = icmp ult i32 %[[NEXT]], %[[LEN2]] +// LLVM: br i1 %[[CMP]], label %[[WHILE_BODY:.*]], label %[[WHILE_END:.*]] +// LLVM: [[WHILE_BODY]]: +// LLVM: br label %[[WHILE_BODY2:.*]] +// LLVM: [[WHILE_BODY2]]: +// LLVM: %[[I_LEN:.*]] = load i32, ptr %[[I]] +// LLVM: %[[I_LEN_SIZE_T2:.*]] = zext i32 %[[I_LEN]] to i64 +// LLVM: %[[STACK_PTR2:.*]] = call ptr @llvm.stacksave.p0() +// LLVM: store ptr %[[STACK_PTR2]], ptr %[[SAVED_STACK2]] +// LLVM: %[[S2:.*]] = alloca i8, i64 %[[I_LEN_SIZE_T2]] +// LLVM: %[[STACK_RESTORE_PTR2:.*]] = load ptr, ptr %[[SAVED_STACK2]] +// LLVM: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR2]]) +// LLVM: br label %[[WHILE_BODY_END:.*]] +// LLVM: [[WHILE_BODY_END]]: +// LLVM: br label %[[WHILE_COND]] +// LLVM: [[WHILE_END]]: +// LLVM: br label %[[F3_END:.*]] +// LLVM: [[F3_END]]: +// LLVM: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// LLVM: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + +// Note: VLA_EXPR0 and VLA_EXPR1 below are emitted to capture debug info. + +// OGCG: define{{.*}} void @f3(i32 {{.*}} %[[LEN_ARG:.*]]) +// OGCG: %[[LEN_ADDR:.*]] = alloca i32 +// OGCG: %[[SAVED_STACK:.*]] = alloca ptr +// OGCG: %[[VLA_EXPR0:.*]] = alloca i64 +// OGCG: %[[I:.*]] = alloca i32 +// OGCG: %[[SAVED_STACK1:.*]] = alloca ptr +// OGCG: %[[VLA_EXPR1:.*]] = alloca i64 +// OGCG: store i32 %[[LEN_ARG]], ptr %[[LEN_ADDR]] +// OGCG: %[[LEN:.*]] = load i32, ptr %[[LEN_ADDR]] +// OGCG: %[[LEN_SIZE_T:.*]] = zext i32 %[[LEN]] to i64 +// OGCG: %[[STACK_PTR:.*]] = call ptr @llvm.stacksave.p0() +// OGCG: store ptr %[[STACK_PTR]], ptr %[[SAVED_STACK]] +// OGCG: %[[S1:.*]] = alloca i8, i64 %[[LEN_SIZE_T]] +// OGCG: store i64 %[[LEN_SIZE_T]], ptr %[[VLA_EXPR0]] +// OGCG: br label %[[WHILE_COND:.*]] +// OGCG: [[WHILE_COND]]: +// OGCG: %[[CUR_I:.*]] = load i32, ptr %[[I]] +// OGCG: %[[NEXT:.*]] = add i32 %[[CUR_I]], 1 +// OGCG: store i32 %[[NEXT]], ptr %[[I]] +// OGCG: %[[LEN2:.*]] = load i32, ptr %[[LEN_ADDR]] +// OGCG: %[[CMP:.*]] = icmp ult i32 %[[NEXT]], %[[LEN2]] +// OGCG: br i1 %[[CMP]], label %[[WHILE_BODY:.*]], label %[[WHILE_END:.*]] +// OGCG: [[WHILE_BODY]]: +// OGCG: %[[I_LEN:.*]] = load i32, ptr %[[I]] +// OGCG: %[[I_LEN_SIZE_T:.*]] = zext i32 %[[I_LEN]] to i64 +// OGCG: %[[STACK_PTR1:.*]] = call ptr @llvm.stacksave.p0() +// OGCG: store ptr %[[STACK_PTR1]], ptr %[[SAVED_STACK1]] +// OGCG: %[[S2:.*]] = alloca i8, i64 %[[I_LEN_SIZE_T]] +// OGCG: store i64 %[[I_LEN_SIZE_T]], ptr %[[VLA_EXPR1]] +// OGCG: %[[STACK_RESTORE_PTR1:.*]] = load ptr, ptr %[[SAVED_STACK1]] +// OGCG: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR1]]) +// OGCG: br label %[[WHILE_COND]] +// OGCG: [[WHILE_END]]: +// OGCG: %[[STACK_RESTORE_PTR:.*]] = load ptr, ptr %[[SAVED_STACK]] +// OGCG: call void @llvm.stackrestore.p0(ptr %[[STACK_RESTORE_PTR]]) + + +// The following test case is disabled because it runs into a bug (unrelated +// to VLA) in the handling of cleanups in loops with break statements. +// +// void f4(unsigned len) { +// char s1[len]; +// while (1) { +// char s2[len]; +// if (1) +// break; +// } +// } +
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