c23b4fbdbb
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).
180 lines
5.7 KiB
C++
180 lines
5.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu %s -o - -emit-llvm -O1 \
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// RUN: -fexceptions -fcxx-exceptions -mllvm -simplifycfg-sink-common=false | FileCheck %s
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//
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// We should emit lifetime.ends for these temporaries in both the 'exception'
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// and 'normal' paths in functions.
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//
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// -O1 is necessary to make lifetime markers appear.
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struct Large {
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int cs[32];
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};
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Large getLarge();
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// Used to ensure we emit invokes.
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struct NontrivialDtor {
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int i;
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~NontrivialDtor();
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};
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// CHECK-LABEL: define{{.*}} void @_Z33cleanupsAreEmittedWithoutTryCatchv
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void cleanupsAreEmittedWithoutTryCatch() {
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[CLEAN:.*]])
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T1:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CONT:[^ ]+]] unwind label %[[LPAD:[^ ]+]]
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//
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// CHECK: [[CONT]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T1]])
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T2:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CONT2:[^ ]+]] unwind label %[[LPAD2:.+]]
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//
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// CHECK: [[CONT2]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T2]])
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[CLEAN]])
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// CHECK: ret void
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//
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// CHECK: [[LPAD]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T1]])
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// CHECK: br label %[[EHCLEANUP:.+]]
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//
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// CHECK: [[LPAD2]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T2]])
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// CHECK: br label %[[EHCLEANUP]]
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//
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// CHECK: [[EHCLEANUP]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[CLEAN]])
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NontrivialDtor clean;
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getLarge();
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getLarge();
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}
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// CHECK-LABEL: define{{.*}} void @_Z30cleanupsAreEmittedWithTryCatchv
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void cleanupsAreEmittedWithTryCatch() {
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[CLEAN:.*]])
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T1:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CONT:[^ ]+]] unwind label %[[LPAD:[^ ]+]]
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//
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// CHECK: [[CONT]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T1]])
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T2:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CONT2:[^ ]+]] unwind label %[[LPAD2:.+]]
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//
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// CHECK: [[CONT2]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T2]])
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// CHECK: br label %[[TRY_CONT:.+]]
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//
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// CHECK: [[LPAD]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T1]])
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// CHECK: br label %[[CATCH:.+]]
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//
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// CHECK: [[LPAD2]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T2]])
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// CHECK: br label %[[CATCH]]
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//
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// CHECK: [[CATCH]]:
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// CHECK-NOT: call void @llvm.lifetime
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// CHECK: invoke void
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// CHECK-NEXT: to label %[[TRY_CONT]] unwind label %[[OUTER_LPAD:.+]]
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//
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// CHECK: [[TRY_CONT]]:
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T_OUTER:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[OUTER_CONT:[^ ]+]] unwind label %[[OUTER_LPAD2:.+]]
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//
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// CHECK: [[OUTER_CONT]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T_OUTER]])
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[CLEAN]])
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// CHECK: ret void
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//
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// CHECK: [[OUTER_LPAD]]:
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// CHECK-NOT: call void @llvm.lifetime
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// CHECK: br label %[[EHCLEANUP:.+]]
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//
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// CHECK: [[OUTER_LPAD2]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T_OUTER]])
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// CHECK: br label %[[EHCLEANUP]]
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//
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// CHECK: [[EHCLEANUP]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[CLEAN]])
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NontrivialDtor clean;
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try {
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getLarge();
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getLarge();
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} catch (...) {}
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getLarge();
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}
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// CHECK-LABEL: define{{.*}} void @_Z39cleanupInTryHappensBeforeCleanupInCatchv
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void cleanupInTryHappensBeforeCleanupInCatch() {
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T1:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CONT:[^ ]+]] unwind label %[[LPAD:[^ ]+]]
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//
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// CHECK: [[CONT]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T1]])
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// CHECK: br label %[[TRY_CONT]]
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//
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// CHECK: [[LPAD]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T1]])
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// CHECK: br i1 {{[^,]+}}, label %[[CATCH_INT_MATCH:[^,]+]], label %[[CATCH_ALL:.+]]
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//
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// CHECK: [[CATCH_INT_MATCH]]:
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T2:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CATCH_INT_CONT:[^ ]+]] unwind label %[[CATCH_INT_LPAD:[^ ]+]]
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//
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// CHECK: [[CATCH_INT_CONT]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T2]])
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// CHECK: br label %[[TRY_CONT]]
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//
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// CHECK: [[TRY_CONT]]:
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// CHECK: ret void
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//
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// CHECK: [[CATCH_ALL]]:
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// CHECK: call void @llvm.lifetime.start.p0(ptr nonnull %[[T3:.*]])
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// CHECK-NEXT: invoke void @_Z8getLargev
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// CHECK-NEXT: to label %[[CATCH_ALL_CONT:[^ ]+]] unwind label %[[CATCH_ALL_LPAD:[^ ]+]]
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//
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// CHECK: [[CATCH_ALL_CONT]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T3]])
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// CHECK: br label %[[TRY_CONT]]
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//
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// CHECK: [[CATCH_ALL_LPAD]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T3]])
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//
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// CHECK: [[CATCH_INT_LPAD]]:
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// CHECK: call void @llvm.lifetime.end.p0(ptr nonnull %[[T2]])
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// CHECK-NOT: call void @llvm.lifetime
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try {
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getLarge();
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} catch (const int &) {
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getLarge();
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} catch (...) {
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getLarge();
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}
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}
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// FIXME: We don't currently emit lifetime markers for aggregate by-value
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// temporaries (e.g. given a function `Large combine(Large, Large);`
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// combine(getLarge(), getLarge()) "leaks" two `Large`s). We probably should. We
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// also don't emit markers for things like:
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//
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// {
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// Large L = getLarge();
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// combine(L, L);
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// }
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//
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// Though this arguably isn't as bad, since we pass a pointer to `L` as one of
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// the two args.
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