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https://github.com/c64scene-ar/llvm-6502.git
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9e81c3bdb2
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
38 lines
1.4 KiB
LLVM
38 lines
1.4 KiB
LLVM
; RUN: opt -S -tbaa -basicaa -gvn < %s | FileCheck -check-prefix=BASICAA %s
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; RUN: opt -S -tbaa -gvn < %s | FileCheck %s
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; rdar://8875631, rdar://8875069
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; BasicAA should notice that the store stores to the entire %u object,
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; so the %tmp5 load is PartialAlias with the store and suppress TBAA.
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; Without BasicAA, TBAA should say that %tmp5 is NoAlias with the store.
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target datalayout = "e-p:64:64:64"
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%union.anon = type { double }
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@u = global %union.anon { double -2.500000e-01 }, align 8
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@endianness_test = global i64 1, align 8
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define i32 @signbit(double %x) nounwind {
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; BASICAA: ret i32 %tmp5.lobit
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; CHECK: ret i32 0
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entry:
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%u = alloca %union.anon, align 8
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%tmp9 = getelementptr inbounds %union.anon* %u, i64 0, i32 0
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store double %x, double* %tmp9, align 8, !tbaa !0
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%tmp2 = load i32* bitcast (i64* @endianness_test to i32*), align 8, !tbaa !3
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%idxprom = sext i32 %tmp2 to i64
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%tmp4 = bitcast %union.anon* %u to [2 x i32]*
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%arrayidx = getelementptr inbounds [2 x i32]* %tmp4, i64 0, i64 %idxprom
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%tmp5 = load i32* %arrayidx, align 4, !tbaa !3
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%tmp5.lobit = lshr i32 %tmp5, 31
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ret i32 %tmp5.lobit
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}
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!0 = metadata !{metadata !4, metadata !4, i64 0}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
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!3 = metadata !{metadata !5, metadata !5, i64 0}
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!4 = metadata !{metadata !"double", metadata !1}
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!5 = metadata !{metadata !"int", metadata !1}
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