derek.holloway
7502bf64a4
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53 lines
1.7 KiB
LLVM
53 lines
1.7 KiB
LLVM
; RUN: opt -S -passes=sroa %s | FileCheck %s
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; With fake use intrinsics generated for small aggregates, check that when
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; SROA slices the aggregate, we generate individual fake use intrinsics for
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; the individual values.
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; Generated from the following source:
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; struct s {
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; int i;
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; int j;
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; };
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;
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; void foo(struct s S) {
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; }
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;
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; void bar() {
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; int arr[2] = {5, 6};
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; }
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;
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%struct.s = type { i32, i32 }
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@__const.bar.arr = private unnamed_addr constant [2 x i32] [i32 5, i32 6], align 4
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; A small struct passed as parameter
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; CHECK-LABEL: define{{.*}}foo
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; CHECK: %[[SLICE1:[^ ]+]] = trunc i64
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; CHECK: %[[SLICE2:[^ ]+]] = trunc i64
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; CHECK-DAG: call{{.*}} @llvm.fake.use(i32 %[[SLICE1]])
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; CHECK-DAG: call{{.*}} @llvm.fake.use(i32 %[[SLICE2]])
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define dso_local void @foo(i64 %S.coerce) optdebug {
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entry:
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%S = alloca %struct.s, align 4
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store i64 %S.coerce, ptr %S, align 4
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%fake.use = load %struct.s, ptr %S, align 4
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notail call void (...) @llvm.fake.use(%struct.s %fake.use)
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ret void
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}
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; A local variable with a small array type.
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; CHECK-LABEL: define{{.*}}bar
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; CHECK: %[[ARRAYSLICE1:[^ ]+]] = load
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; CHECK: %[[ARRAYSLICE2:[^ ]+]] = load
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; CHECK-DAG: call{{.*}} @llvm.fake.use(i32 %[[ARRAYSLICE1]])
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; CHECK-DAG: call{{.*}} @llvm.fake.use(i32 %[[ARRAYSLICE2]])
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define dso_local void @bar() optdebug {
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entry:
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%arr = alloca [2 x i32], align 4
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call void @llvm.memcpy.p0i8.p0i8.i64(ptr align 4 %arr, ptr align 4 bitcast (ptr @__const.bar.arr to ptr), i64 8, i1 false)
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%fake.use = load [2 x i32], ptr %arr, align 4
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notail call void (...) @llvm.fake.use([2 x i32] %fake.use)
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ret void
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}
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declare void @llvm.memcpy.p0i8.p0i8.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg)
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