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Remove the command line argument "struct-path-tbaa" since we should not depend on command line argument to decide which format the IR file is using. Instead, we check the first operand of the tbaa tag node, if it is a MDNode, we treat it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA format. When clang starts to use struct-path aware TBAA format no matter whether struct-path-tbaa is no, and we can auto-upgrade existing bc files, the support for scalar TBAA format can be dropped. Existing testing cases are updated to use the struct-path aware TBAA format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191538 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
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; Verify that instcombine preserves TBAA tags when converting a memcpy into
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; a scalar load and store.
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%struct.test1 = type { float }
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; CHECK: @test
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; CHECK: %2 = load float* %0, align 4, !tbaa !0
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; CHECK: store float %2, float* %1, align 4, !tbaa !0
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; CHECK: ret
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define void @test1(%struct.test1* nocapture %a, %struct.test1* nocapture %b) {
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entry:
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%0 = bitcast %struct.test1* %a to i8*
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%1 = bitcast %struct.test1* %b to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 4, i32 4, i1 false), !tbaa.struct !3
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ret void
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}
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%struct.test2 = type { i32 (i8*, i32*, double*)** }
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define i32 (i8*, i32*, double*)*** @test2() {
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; CHECK-LABEL: @test2(
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; CHECK-NOT: memcpy
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; CHECK: ret
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%tmp = alloca %struct.test2, align 8
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%tmp1 = bitcast %struct.test2* %tmp to i8*
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp1, i8* undef, i64 8, i32 8, i1 false), !tbaa.struct !4
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%tmp2 = getelementptr %struct.test2* %tmp, i32 0, i32 0
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%tmp3 = load i32 (i8*, i32*, double*)*** %tmp2
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ret i32 (i8*, i32*, double*)*** %tmp2
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}
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; CHECK: !0 = metadata !{metadata !1, metadata !1, i64 0}
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; CHECK: !1 = metadata !{metadata !"float", metadata !2}
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!0 = metadata !{metadata !"Simple C/C++ TBAA"}
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!1 = metadata !{metadata !"omnipotent char", metadata !0}
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!2 = metadata !{metadata !5, metadata !5, i64 0}
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!3 = metadata !{i64 0, i64 4, metadata !2}
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!4 = metadata !{i64 0, i64 8, null}
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!5 = metadata !{metadata !"float", metadata !0}
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