155 lines
5.2 KiB
LLVM
155 lines
5.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -basic-aa -dse < %s | FileCheck %s
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target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind
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declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i1) nounwind
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define void @test1() {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[A:%.*]] = alloca i8, align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[A]])
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; CHECK-NEXT: ret void
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;
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%A = alloca i8
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store i8 0, i8* %A ;; Written to by memset
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call void @llvm.lifetime.end.p0i8(i64 1, i8* %A)
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call void @llvm.memset.p0i8.i8(i8* %A, i8 0, i8 -1, i1 false)
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ret void
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}
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define void @test2(i32* %P) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[Q:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 1
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; CHECK-NEXT: [[R:%.*]] = bitcast i32* [[Q]] to i8*
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; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* [[R]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* [[R]])
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; CHECK-NEXT: ret void
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;
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%Q = getelementptr i32, i32* %P, i32 1
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%R = bitcast i32* %Q to i8*
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call void @llvm.lifetime.start.p0i8(i64 4, i8* %R)
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store i32 0, i32* %Q ;; This store is dead.
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %R)
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ret void
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}
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; lifetime.end only marks the first two bytes of %A as dead. Make sure
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; `store i8 20, i8* %A.2 is not removed.
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define void @test3_lifetime_end_partial() {
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; CHECK-LABEL: @test3_lifetime_end_partial(
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; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[A_0:%.*]] = bitcast i32* [[A]] to i8*
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; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 2, i8* [[A_0]])
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; CHECK-NEXT: [[A_1:%.*]] = getelementptr i8, i8* [[A_0]], i64 1
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; CHECK-NEXT: [[A_2:%.*]] = getelementptr i8, i8* [[A_0]], i64 2
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; CHECK-NEXT: store i8 20, i8* [[A_2]], align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 2, i8* [[A_0]])
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; CHECK-NEXT: call void @use(i8* [[A_1]])
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; CHECK-NEXT: ret void
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;
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%A = alloca i32
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%A.0 = bitcast i32 * %A to i8*
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call void @llvm.lifetime.start.p0i8(i64 2, i8* %A.0)
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%A.1 = getelementptr i8, i8* %A.0, i64 1
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%A.2 = getelementptr i8, i8* %A.0, i64 2
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store i8 0, i8* %A.0
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store i8 10, i8* %A.1
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store i8 20, i8* %A.2
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call void @llvm.lifetime.end.p0i8(i64 2, i8* %A.0)
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call void @use(i8* %A.1)
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ret void
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}
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; lifetime.end only marks the first two bytes of %A as dead. Make sure
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; `store i8 20, i8* %A.2 is not removed.
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define void @test4_lifetime_end_partial_loop() {
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; CHECK-LABEL: @test4_lifetime_end_partial_loop(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[A_0:%.*]] = bitcast i32* [[A]] to i8*
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 2, i8* [[A_0]])
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; CHECK-NEXT: [[A_1:%.*]] = getelementptr i8, i8* [[A_0]], i64 1
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; CHECK-NEXT: [[A_2:%.*]] = getelementptr i8, i8* [[A_0]], i64 2
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; CHECK-NEXT: call void @use(i8* [[A_1]])
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; CHECK-NEXT: store i8 20, i8* [[A_2]], align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 2, i8* [[A_0]])
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; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 10
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i8 [[IV_NEXT]], 10
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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%A = alloca i32
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%A.0 = bitcast i32 * %A to i8*
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br label %loop
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loop:
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%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
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call void @llvm.lifetime.start.p0i8(i64 2, i8* %A.0)
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%A.1 = getelementptr i8, i8* %A.0, i64 1
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%A.2 = getelementptr i8, i8* %A.0, i64 2
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call void @use(i8* %A.1)
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store i8 20, i8* %A.2
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store i8 10, i8* %A.1
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store i8 0, i8* %A.0
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call void @llvm.lifetime.end.p0i8(i64 2, i8* %A.0)
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%iv.next = add i8 %iv, 10
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%exitcond = icmp eq i8 %iv.next, 10
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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; lifetime.end only marks the first two bytes of %A as dead. Make sure
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; `store i8 20, i8* %A.2 is not removed.
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define void @test5_lifetime_end_partial(i32* %A) {
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; CHECK-LABEL: @test5_lifetime_end_partial(
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; CHECK-NEXT: [[A_0:%.*]] = bitcast i32* [[A:%.*]] to i8*
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; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 2, i8* [[A_0]])
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; CHECK-NEXT: [[A_1:%.*]] = getelementptr i8, i8* [[A_0]], i64 1
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; CHECK-NEXT: [[A_2:%.*]] = getelementptr i8, i8* [[A_0]], i64 2
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; CHECK-NEXT: store i8 20, i8* [[A_2]], align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 2, i8* [[A_0]])
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; CHECK-NEXT: call void @use(i8* [[A_1]])
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; CHECK-NEXT: store i8 30, i8* [[A_1]], align 1
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; CHECK-NEXT: store i8 40, i8* [[A_2]], align 1
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; CHECK-NEXT: ret void
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;
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%A.0 = bitcast i32 * %A to i8*
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call void @llvm.lifetime.start.p0i8(i64 2, i8* %A.0)
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%A.1 = getelementptr i8, i8* %A.0, i64 1
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%A.2 = getelementptr i8, i8* %A.0, i64 2
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store i8 0, i8* %A.0
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store i8 10, i8* %A.1
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store i8 20, i8* %A.2
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call void @llvm.lifetime.end.p0i8(i64 2, i8* %A.0)
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call void @use(i8* %A.1)
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store i8 30, i8* %A.1
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store i8 40, i8* %A.2
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ret void
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}
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declare void @use(i8*) readonly
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