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be5af50e7d
Use the elementtype attribute introduced in D105407 for the llvm.preserve.array/struct.index intrinsics. It carries the element type of the GEP these intrinsics effectively encode. This patch: * Adds a verifier check that the attribute is required. * Adds it in the IRBuilder methods for these intrinsics. * Autoupgrades old bitcode without the attribute. * Updates the lowering code to use the attribute rather than the pointer element type. * Updates lots of tests to specify the attribute. * Adds -force-opaque-pointers to the intrinsic-array.ll test to demonstrate they work now. https://reviews.llvm.org/D106184
19 lines
834 B
C
19 lines
834 B
C
// RUN: %clang -target x86_64 -emit-llvm -S -g %s -o - | FileCheck %s
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#define _(x) (__builtin_preserve_access_index(x))
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struct s1 {
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char a;
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int b[4];
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};
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const void *unit1(struct s1 *arg) {
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return _(&arg->b[2]);
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}
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// CHECK: define dso_local i8* @unit1
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// CHECK: call [4 x i32]* @llvm.preserve.struct.access.index.p0a4i32.p0s_struct.s1s(%struct.s1* elementtype(%struct.s1) %{{[0-9a-z]+}}, i32 1, i32 1), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[STRUCT_S1:[0-9]+]]
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// CHECK: call i32* @llvm.preserve.array.access.index.p0i32.p0a4i32([4 x i32]* elementtype([4 x i32]) %{{[0-9a-z]+}}, i32 1, i32 2), !dbg !{{[0-9]+}}, !llvm.preserve.access.index ![[ARRAY:[0-9]+]]
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//
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// CHECK: ![[ARRAY]] = !DICompositeType(tag: DW_TAG_array_type
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// CHECK: ![[STRUCT_S1]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1"
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