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).
46 lines
2.4 KiB
LLVM
46 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -S -passes=memcpyopt -verify-memoryssa | FileCheck %s
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; Check that we don't introduce llvm.lifetime.end.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-grtev4-linux-gnu"
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; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
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declare void @llvm.lifetime.start.p0(ptr nocapture) #0
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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define void @test() {
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; CHECK-LABEL: define void @test() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[AGG_TMP_SROA_14:%.*]] = alloca [20 x i8], align 4
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; CHECK-NEXT: [[AGG_TMP_SROA_14_128_SROA_IDX:%.*]] = getelementptr i8, ptr [[AGG_TMP_SROA_14]], i64 4
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[AGG_TMP_SROA_14_128_SROA_IDX]], i8 0, i64 1, i1 false)
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; CHECK-NEXT: [[AGG_TMP3_SROA_35_128_SROA_IDX:%.*]] = getelementptr i8, ptr [[AGG_TMP_SROA_14]], i64 4
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr inttoptr (i64 4 to ptr), i8 0, i64 1, i1 false)
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr null, i8 0, i64 1, i1 false)
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; CHECK-NEXT: ret void
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;
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entry:
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%agg.tmp3.sroa.35 = alloca [20 x i8], align 4
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%agg.tmp.sroa.14 = alloca [20 x i8], align 4
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%agg.tmp.sroa.14.128.sroa_idx = getelementptr i8, ptr %agg.tmp.sroa.14, i64 4
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call void @llvm.memset.p0.i64(ptr %agg.tmp.sroa.14.128.sroa_idx, i8 0, i64 1, i1 false)
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call void @llvm.lifetime.start.p0(ptr %agg.tmp3.sroa.35)
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call void @llvm.memcpy.p0.p0.i64(ptr %agg.tmp3.sroa.35, ptr %agg.tmp.sroa.14, i64 20, i1 false)
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%agg.tmp3.sroa.35.128.sroa_idx = getelementptr i8, ptr %agg.tmp3.sroa.35, i64 4
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call void @llvm.memcpy.p0.p0.i64(ptr inttoptr (i64 4 to ptr), ptr %agg.tmp3.sroa.35.128.sroa_idx, i64 1, i1 false)
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call void @llvm.memcpy.p0.p0.i64(ptr null, ptr inttoptr (i64 4 to ptr), i64 1, i1 false)
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ret void
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}
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; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1
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; uselistorder directives
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uselistorder i64 4, { 2, 0, 1 }
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uselistorder ptr @llvm.memcpy.p0.p0.i64, { 2, 1, 0 }
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attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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