86509e8c3b
We relied on wouldInstructionBeTriviallyDead before but that functions does not take assumed information, especially for calls, into account. The replacement, AAIsDead::isAssumeSideEffectFree, does. This change makes AAIsDeadCallSiteReturn more complex as we can have a dead call or only dead users. The test have been modified to include a side effect where there was none in order to keep the coverage. Reviewed By: sstefan1 Differential Revision: https://reviews.llvm.org/D73311
43 lines
2.1 KiB
LLVM
43 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
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; RUN: opt -S -passes='attributor' -aa-pipeline='basic-aa' -attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=1 < %s | FileCheck %s
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; Unused arguments from variadic functions cannot be eliminated as that changes
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; their classiciation according to the SysV amd64 ABI. Clang and other frontends
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; bake in the classification when they use things like byval, as in this test.
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target datalayout = "e-m: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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%struct.tt0 = type { i64, i64 }
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%struct.__va_list_tag = type { i32, i32, i8*, i8* }
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@t45 = internal global %struct.tt0 { i64 1335139741, i64 438042995 }, align 8
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; Function Attrs: nounwind uwtable
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define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 {
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; CHECK-LABEL: define {{[^@]+}}@main
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; CHECK-SAME: (i32 [[ARGC:%.*]], i8** nocapture nofree readnone [[ARGV:%.*]])
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; CHECK-NEXT: entry:
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; CHECK-NEXT: tail call void (i8*, i8*, i8*, i8*, i8*, ...) @callee_t0f(i8* undef, i8* undef, i8* undef, i8* undef, i8* undef, %struct.tt0* nonnull byval align 8 dereferenceable(16) @t45)
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; CHECK-NEXT: ret i32 0
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;
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entry:
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tail call void (i8*, i8*, i8*, i8*, i8*, ...) @callee_t0f(i8* undef, i8* undef, i8* undef, i8* undef, i8* undef, %struct.tt0* byval align 8 @t45)
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ret i32 0
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}
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; Function Attrs: nounwind uwtable
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define internal void @callee_t0f(i8* nocapture readnone %tp13, i8* nocapture readnone %tp14, i8* nocapture readnone %tp15, i8* nocapture readnone %tp16, i8* nocapture readnone %tp17, ...) {
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; CHECK-LABEL: define {{[^@]+}}@callee_t0f
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; CHECK-SAME: (i8* noalias nocapture nofree nonnull readnone [[TP13:%.*]], i8* noalias nocapture nofree nonnull readnone [[TP14:%.*]], i8* noalias nocapture nofree nonnull readnone [[TP15:%.*]], i8* noalias nocapture nofree nonnull readnone [[TP16:%.*]], i8* noalias nocapture nofree nonnull readnone [[TP17:%.*]], ...)
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @sink(i32 0)
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; CHECK-NEXT: ret void
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;
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entry:
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call void @sink(i32 0)
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ret void
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}
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declare void @sink(i32)
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