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).
52 lines
2.5 KiB
LLVM
52 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=memcpyopt,instcombine -S < %s -verify-memoryssa | FileCheck %s
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target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @foo(ptr noalias nocapture sret([8 x i64]) dereferenceable(64) %sret) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry-block:
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[SRET:%.*]], i8 0, i64 64, i1 false)
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; CHECK-NEXT: ret void
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;
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entry-block:
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%a = alloca [8 x i64], align 8
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call void @llvm.lifetime.start.p0(ptr %a)
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call void @llvm.memset.p0.i64(ptr align 8 %a, i8 0, i64 64, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %sret, ptr align 8 %a, i64 64, i1 false)
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call void @llvm.lifetime.end.p0(ptr %a)
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ret void
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}
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define void @bar(ptr noalias nocapture sret([8 x i64]) dereferenceable(64) %sret, ptr noalias nocapture dereferenceable(64) %out) {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: entry-block:
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; CHECK-NEXT: [[A:%.*]] = alloca [8 x i64], align 8
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[A]])
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[A]], i8 0, i64 64, i1 false)
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[SRET:%.*]], i8 0, i64 64, i1 false)
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) [[A]], i8 42, i64 32, i1 false)
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) [[OUT:%.*]], ptr noundef nonnull align 8 dereferenceable(64) [[A]], i64 64, i1 false)
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[A]])
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; CHECK-NEXT: ret void
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;
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entry-block:
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%a = alloca [8 x i64], align 8
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call void @llvm.lifetime.start.p0(ptr %a)
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call void @llvm.memset.p0.i64(ptr align 8 %a, i8 0, i64 64, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %sret, ptr align 8 %a, i64 64, i1 false)
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call void @llvm.memset.p0.i64(ptr align 8 %a, i8 42, i64 32, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %out, ptr align 8 %a, i64 64, i1 false)
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call void @llvm.lifetime.end.p0(ptr %a)
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ret void
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}
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declare void @llvm.lifetime.start.p0(ptr nocapture) nounwind
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declare void @llvm.lifetime.end.p0(ptr nocapture) nounwind
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) nounwind
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind
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