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).
119 lines
4.9 KiB
LLVM
119 lines
4.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s
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; performCallSlotOptzn in MemCpy should not exchange the calls to
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; @llvm.lifetime.start and @llvm.memcpy.
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1)
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declare void @llvm.lifetime.start.p0(ptr nocapture)
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declare void @llvm.lifetime.end.p0(ptr nocapture)
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define void @call_slot(ptr nocapture dereferenceable(16) %arg1) {
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; CHECK-LABEL: @call_slot(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP:%.*]] = alloca [8 x i8], align 8
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[TMP]])
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; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds i8, ptr [[TMP]], i64 7
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; CHECK-NEXT: store i8 0, ptr [[TMP10]], align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[TMP]])
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; CHECK-NEXT: ret void
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;
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bb:
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%tmp = alloca [8 x i8], align 8
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call void @llvm.lifetime.start.p0(ptr %tmp)
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%tmp10 = getelementptr inbounds i8, ptr %tmp, i64 7
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store i8 0, ptr %tmp10, align 1
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %arg1, ptr align 8 %tmp, i64 16, i1 false)
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call void @llvm.lifetime.end.p0(ptr %tmp)
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ret void
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}
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define void @memcpy_memcpy_across_lifetime(ptr noalias %p1, ptr noalias %p2, ptr noalias %p3) {
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; CHECK-LABEL: @memcpy_memcpy_across_lifetime(
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; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[A]])
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[A]], ptr [[P1:%.*]], i64 16, i1 false)
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[P1]], ptr [[P2:%.*]], i64 16, i1 false)
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[P2]], ptr [[A]], i64 16, i1 false)
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[A]])
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[P3:%.*]], ptr [[P2]], i64 16, i1 false)
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; CHECK-NEXT: ret void
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;
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%a = alloca [16 x i8]
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call void @llvm.lifetime.start.p0(ptr %a)
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call void @llvm.memcpy.p0.p0.i64(ptr %a, ptr %p1, i64 16, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr %p1, ptr %p2, i64 16, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr %p2, ptr %a, i64 16, i1 false)
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call void @llvm.lifetime.end.p0(ptr %a)
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call void @llvm.memcpy.p0.p0.i64(ptr %p3, ptr %p2, i64 16, i1 false)
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ret void
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}
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declare void @call(ptr)
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define i32 @call_slot_move_lifetime_start() {
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; CHECK-LABEL: @call_slot_move_lifetime_start(
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; CHECK-NEXT: [[TMP:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[DST:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[DST]])
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; CHECK-NEXT: call void @call(ptr [[DST]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[DST]])
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; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[DST]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%tmp = alloca i32
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%dst = alloca i32
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call void @call(ptr %tmp)
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call void @llvm.lifetime.start.p0(ptr %dst)
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dst, ptr align 4 %tmp, i64 4, i1 false)
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call void @llvm.lifetime.end.p0(ptr %dst)
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%v = load i32, ptr %dst
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ret i32 %v
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}
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define i32 @call_slot_two_lifetime_starts() {
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; CHECK-LABEL: @call_slot_two_lifetime_starts(
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; CHECK-NEXT: [[TMP:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[DST:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @call(ptr [[TMP]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[DST]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[DST]])
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DST]], ptr align 4 [[TMP]], i64 4, i1 false)
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[DST]])
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; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[DST]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%tmp = alloca i32
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%dst = alloca i32
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call void @call(ptr %tmp)
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call void @llvm.lifetime.start.p0(ptr %dst)
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call void @llvm.lifetime.start.p0(ptr %dst)
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dst, ptr align 4 %tmp, i64 4, i1 false)
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call void @llvm.lifetime.end.p0(ptr %dst)
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%v = load i32, ptr %dst
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ret i32 %v
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}
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define i32 @call_slot_clobber_before_lifetime_start() {
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; CHECK-LABEL: @call_slot_clobber_before_lifetime_start(
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; CHECK-NEXT: [[TMP:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[DST:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @call(ptr [[TMP]])
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; CHECK-NEXT: store i32 0, ptr [[DST]], align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[DST]])
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DST]], ptr align 4 [[TMP]], i64 4, i1 false)
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[DST]])
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; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[DST]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%tmp = alloca i32
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%dst = alloca i32
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call void @call(ptr %tmp)
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store i32 0, ptr %dst
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call void @llvm.lifetime.start.p0(ptr %dst)
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dst, ptr align 4 %tmp, i64 4, i1 false)
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call void @llvm.lifetime.end.p0(ptr %dst)
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%v = load i32, ptr %dst
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ret i32 %v
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}
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