e0ac46e69d
This reverts commit d618f1c3b1.
This commit wasn't reviewed ahead of time and significant concerns were
raised immediately after it landed. According to our developer policy
this warrants immediate revert of the commit.
https://llvm.org/docs/DeveloperPolicy.html#patch-reversion-policy
Differential Revision: https://reviews.llvm.org/D155509
62 lines
3.1 KiB
C
62 lines
3.1 KiB
C
// RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s
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// CHECK: [[AGG:%.*]] = type { i32 }
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typedef struct { int v; } Agg;
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Agg makeAgg(void);
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// When assigning into a __block variable, ensure that we compute that
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// address *after* evaluating the RHS when the RHS has the capacity to
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// cause a block copy. rdar://9309454
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void test0(void) {
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__block Agg a = {100};
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^{ (void)a; };
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a = makeAgg();
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}
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// CHECK-LABEL: define{{.*}} void @test0()
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// CHECK: [[A:%.*]] = alloca [[BYREF:%.*]], align 8
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// CHECK-NEXT: alloca <{ ptr, i32, i32, ptr, ptr, ptr }>, align 8
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// CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
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// CHECK: [[RESULT:%.*]] = call i32 @makeAgg()
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], ptr [[TEMP]], i32 0, i32 0
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// CHECK-NEXT: store i32 [[RESULT]], ptr [[T0]]
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// Check that we properly assign into the forwarding pointer.
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// CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[BYREF]], ptr [[A]], i32 0, i32 1
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// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[A_FORWARDING]]
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF]], ptr [[T0]], i32 0, i32 4
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)
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// Verify that there's nothing else significant in the function.
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// CHECK-NEXT: call void @_Block_object_dispose(ptr [[A]], i32 8)
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// CHECK-NEXT: ret void
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// When chaining assignments into __block variables, make sure we
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// propagate the actual value into the outer variable.
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// rdar://11757470
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void test1(void) {
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__block Agg a, b;
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^{ (void)a; (void)b; };
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a = b = makeAgg();
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}
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// CHECK-LABEL: define{{.*}} void @test1()
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// CHECK: [[A:%.*]] = alloca [[A_BYREF:%.*]], align 8
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// CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 8
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// CHECK-NEXT: alloca <{ ptr, i32, i32, ptr, ptr, ptr, ptr }>, align 8
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// CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
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// CHECK: [[RESULT:%.*]] = call i32 @makeAgg()
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], ptr [[TEMP]], i32 0, i32 0
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// CHECK-NEXT: store i32 [[RESULT]], ptr [[T0]]
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// Check that we properly assign into the forwarding pointer, first for b:
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// CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds [[B_BYREF]], ptr [[B]], i32 0, i32 1
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// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B_FORWARDING]]
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[B_BYREF]], ptr [[T0]], i32 0, i32 4
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)
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// Then for 'a':
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// CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[A_BYREF]], ptr [[A]], i32 0, i32 1
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// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[A_FORWARDING]]
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A_BYREF]], ptr [[T0]], i32 0, i32 4
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)
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// Verify that there's nothing else significant in the function.
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// CHECK-NEXT: call void @_Block_object_dispose(ptr [[B]], i32 8)
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// CHECK-NEXT: call void @_Block_object_dispose(ptr [[A]], i32 8)
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// CHECK-NEXT: ret void
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