derek.holloway
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85 lines
2.8 KiB
LLVM
85 lines
2.8 KiB
LLVM
; RUN: opt -passes='require<domtree>,instcombine<no-verify-fixpoint>,require<domtree>' -S < %s | FileCheck %s
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; Note: The -loops above can be anything that requires the domtree, and is
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; necessary to work around a pass-manager bug.
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; In _Z3fooR1s we can only infer nuw on the gep after the IV has been
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; simplified, which we can't do in one iteration. (Note that nowadays
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; LoopUnroll would pre-simplify the IV and avoid the issue.)
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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.s = type { ptr }
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; Function Attrs: nounwind uwtable
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define void @_Z3fooR1s(ptr nocapture readonly dereferenceable(8) %x) #0 {
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; CHECK-LABEL: @_Z3fooR1s
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; CHECK: call void @llvm.assume
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; CHECK-NOT: call void @llvm.assume
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entry:
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%0 = load ptr, ptr %x, align 8
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%ptrint = ptrtoint ptr %0 to i64
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%maskedptr = and i64 %ptrint, 31
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%maskcond = icmp eq i64 %maskedptr, 0
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.1, %for.body ]
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tail call void @llvm.assume(i1 %maskcond)
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%arrayidx = getelementptr inbounds double, ptr %0, i64 %indvars.iv
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%1 = load double, ptr %arrayidx, align 16
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%add = fadd double %1, 1.000000e+00
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tail call void @llvm.assume(i1 %maskcond)
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%mul = fmul double %add, 2.000000e+00
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store double %mul, ptr %arrayidx, align 16
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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tail call void @llvm.assume(i1 %maskcond)
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%arrayidx.1 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next
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%2 = load double, ptr %arrayidx.1, align 8
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%add.1 = fadd double %2, 1.000000e+00
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tail call void @llvm.assume(i1 %maskcond)
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%mul.1 = fmul double %add.1, 2.000000e+00
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store double %mul.1, ptr %arrayidx.1, align 8
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%indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
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%exitcond.1 = icmp eq i64 %indvars.iv.next, 1599
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br i1 %exitcond.1, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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declare align 8 ptr @get()
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; Check that redundant align assume is removed
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; CHECK-LABEL: @test
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; CHECK-NOT: call void @llvm.assume
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define void @test1() {
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%p = call align 8 ptr @get()
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%ptrint = ptrtoint ptr %p to i64
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%maskedptr = and i64 %ptrint, 7
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%maskcond = icmp eq i64 %maskedptr, 0
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call void @llvm.assume(i1 %maskcond)
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ret void
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}
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; Check that redundant align assume is removed
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; CHECK-LABEL: @test
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; CHECK-NOT: call void @llvm.assume
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define void @test3() {
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%p = alloca i8, align 8
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%ptrint = ptrtoint ptr %p to i64
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%maskedptr = and i64 %ptrint, 7
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%maskcond = icmp eq i64 %maskedptr, 0
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call void @llvm.assume(i1 %maskcond)
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ret void
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}
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; Function Attrs: nounwind
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declare void @llvm.assume(i1) #1
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind }
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