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TheRock/compiler/amd-llvm/clang/test/CIR/CodeGen/switch-cleanup.cpp
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derek.holloway 7502bf64a4
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199 lines
6.7 KiB
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// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o %t.cir
// RUN: FileCheck --check-prefix=CIR --input-file=%t.cir %s
// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o %t-cir.ll
// RUN: FileCheck --check-prefix=LLVM,LLVMCIR --input-file=%t-cir.ll %s
// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o %t.ll
// RUN: FileCheck --check-prefix=LLVM,OGCG --input-file=%t.ll %s
struct SmallVector {
~SmallVector();
};
struct BitVector {
SmallVector Bits;
};
// The switch body is a single DeclStmt (no compound statement / explicit scope).
void simple_stmt_body(int x) {
switch (x)
BitVector bv;
}
// CIR-LABEL: cir.func{{.*}} @_Z16simple_stmt_bodyi
// CIR: cir.scope {
// CIR: cir.alloca !rec_BitVector, !cir.ptr<!rec_BitVector>, ["bv"]
// CIR: cir.switch(%{{.*}} : !s32i) {
// CIR: cir.cleanup.scope {
// CIR: cir.yield
// CIR: } cleanup normal {
// CIR: cir.call @_ZN9BitVectorD1Ev
// CIR: cir.yield
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: }
// CIR: cir.return
// LLVM-LABEL: define{{.*}} void @_Z16simple_stmt_bodyi
// LLVM: alloca %struct.BitVector
// LLVM: switch i32 %{{.*}}, label %[[EPILOG:.*]] [
// LLVM: ]
// The CIR pipeline emits the (dead) destructor cleanup; OGCG drops it entirely.
// This is inside an unreachable block in LLVMCIR.
// LLVMCIR: call void @_ZN9BitVectorD1Ev
// OGCG: [[EPILOG]]:
// LLVM: ret void
// The switch body is a CompoundStmt, so it introduces an explicit scope and the
// declaration is emitted through the unassociated-statement path.
void compound_stmt_body(int x) {
switch (x) {
BitVector bv;
}
}
// CIR-LABEL: cir.func{{.*}} @_Z18compound_stmt_bodyi
// CIR: cir.scope {
// CIR: cir.alloca !rec_BitVector, !cir.ptr<!rec_BitVector>, ["bv"]
// CIR: cir.switch(%{{.*}} : !s32i) {
// CIR: cir.cleanup.scope {
// CIR: cir.yield
// CIR: } cleanup normal {
// CIR: cir.call @_ZN9BitVectorD1Ev
// CIR: cir.yield
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: }
// CIR: cir.return
// LLVM-LABEL: define{{.*}} void @_Z18compound_stmt_bodyi
// LLVM: alloca %struct.BitVector
// LLVM: switch i32 %{{.*}}, label %[[EPILOG:.*]] [
// LLVM: ]
// The CIR pipeline emits the (dead) destructor cleanup; OGCG drops it entirely.
// This is inside an unreachable block in LLVMCIR.
// LLVMCIR: call void @_ZN9BitVectorD1Ev
// OGCG: [[EPILOG]]:
// LLVM: ret void
void cleanup_in_case(int x) {
switch (x) {
default:
break;
case 0:
BitVector bv;
break;
}
}
// CIR-LABEL: cir.func{{.*}} @_Z15cleanup_in_casei
// CIR: cir.scope {
// CIR: cir.alloca !rec_BitVector, !cir.ptr<!rec_BitVector>, ["bv"]
// CIR: cir.switch(%{{.*}} : !s32i) {
// CIR: cir.case(default, []) {
// CIR: cir.break
// CIR: }
// CIR: cir.case(equal, [#cir.int<0> : !s32i]) {
// CIR: cir.cleanup.scope {
// CIR: cir.break
// CIR: ^bb[[DEAD_BLOCK:.*]]:
// CIR: cir.yield
// CIR: } cleanup normal {
// CIR: cir.call @_ZN9BitVectorD1Ev
// CIR: cir.yield
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: }
// CIR: cir.return
// LLVM-LABEL: define{{.*}} void @_Z15cleanup_in_casei
// LLVMCIR: %[[CLEANUP_FLAG:.*]] = alloca i32
// LLVM: alloca %struct.BitVector
// LLVM: switch i32 %{{.*}}, label %[[DEFAULT:.*]] [
// LLVM: i32 0, label %[[CASE_ZERO:.*]]
// LLVM: ]
// LLVM: [[DEFAULT]]:
// LLVM: br label %[[EPILOG:.*]]
// LLVM: [[CASE_ZERO]]:
// LLVMCIR: store i32 1, ptr %[[CLEANUP_FLAG]]
// LLVMCIR: br label %[[CASE_ZERO_CLEANUP:.*]]
// LLVMCIR: [[DEAD_BLOCK:.*]]:
// LLVMCIR: store i32 0, ptr %[[CLEANUP_FLAG]]
// LLVMCIR: br label %[[CASE_ZERO_CLEANUP]]
// LLVMCIR: [[CASE_ZERO_CLEANUP]]:
// LLVM: call void @_ZN9BitVectorD1Ev
// LLVMCIR: br label %[[CLEANUP_CONTINUE:.*]]
// LLVM: br label %[[EPILOG]]
// LLVM: [[EPILOG]]:
// LLVM: ret void
void cleanup_in_while_in_switch(int x) {
switch (x)
while (x) {
default:
break;
case 0:
BitVector bv;
continue;
}
}
// CIR-LABEL: cir.func{{.*}} @_Z26cleanup_in_while_in_switchi
// CIR: cir.scope {
// CIR: cir.switch(%{{.*}} : !s32i) {
// CIR: cir.scope {
// CIR: cir.while {
// CIR: cir.condition
// CIR: } do {
// CIR: cir.scope {
// CIR: cir.alloca !rec_BitVector, !cir.ptr<!rec_BitVector>, ["bv"]
// CIR: cir.case(default, []) {
// CIR: cir.break
// CIR: }
// CIR: cir.case(equal, [#cir.int<0> : !s32i]) {
// CIR: cir.cleanup.scope {
// CIR: cir.yield
// CIR: } cleanup normal {
// CIR: cir.call @_ZN9BitVectorD1Ev
// CIR: cir.yield
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: cir.continue
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: }
// CIR: cir.yield
// CIR: }
// CIR: }
// CIR: cir.return
// LLVM-LABEL: define{{.*}} void @_Z26cleanup_in_while_in_switchi
// LLVM: alloca %struct.BitVector
// LLVM: switch i32 %{{.*}}, label %[[DEFAULT:.*]] [
// LLVM: i32 0, label %[[CASE_ZERO:.*]]
// LLVM: ]
// LLVM: [[DEAD_BLOCK:.*]]:
// LLVMCIR: br label %[[SWITCH_BODY:.*]]
// OGCG: br label %[[WHILE_COND:.*]]
// LLVMCIR: [[SWITCH_BODY]]:
// LLVMCIR: br label %[[WHILE_COND:.*]]
// LLVM: [[WHILE_COND]]:
// LLVM: icmp
// LLVM: br i1 %{{.*}}, label %[[WHILE_BODY:.*]], label %[[WHILE_END:.*]]
// LLVM: [[WHILE_BODY]]:
// LLVM: br label %[[DEFAULT]]
// LLVM: [[DEFAULT]]:
// LLVM: br label %[[WHILE_END]]
// LLVM: [[CASE_ZERO]]:
// LLVM: call void @_ZN9BitVectorD1Ev
// LLVM: br label %[[WHILE_COND]]
// LLVM: [[WHILE_END]]:
// LLVM: br label %[[EPILOG:.*]]
// LLVM: [[EPILOG]]:
// LLVM: ret void