derek.holloway
7502bf64a4
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77 lines
2.9 KiB
LLVM
77 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
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; ScalarEvolution should be able to understand the loop and eliminate the casts.
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target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-p4:64:64:64-n16:32:64"
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define void @foo(ptr addrspace(1) nocapture %d, i32 %n) nounwind {
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;
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; CHECK-LABEL: 'foo'
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; CHECK-NEXT: Determining loop execution counts for: @foo
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; CHECK-NEXT: Loop %bb: backedge-taken count is (-1 + %n)
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; CHECK-NEXT: Loop %bb: constant max backedge-taken count is i32 2147483646
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; CHECK-NEXT: Loop %bb: symbolic max backedge-taken count is (-1 + %n)
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; CHECK-NEXT: Loop %bb: Trip multiple is 1
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;
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entry:
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%0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
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br i1 %0, label %bb.nph, label %return
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb1, %bb.nph
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%i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2]
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%p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2]
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%1 = sext i8 %p.01 to i32 ; <i32> [#uses=1]
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%2 = sext i32 %i.02 to i64 ; <i64> [#uses=1]
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%3 = getelementptr i32, ptr addrspace(1) %d, i64 %2 ; <ptr> [#uses=1]
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store i32 %1, ptr addrspace(1) %3, align 4
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%4 = add i8 %p.01, 1 ; <i8> [#uses=1]
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%5 = add i32 %i.02, 1 ; <i32> [#uses=2]
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br label %bb1
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bb1: ; preds = %bb
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%6 = icmp slt i32 %5, %n ; <i1> [#uses=1]
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br i1 %6, label %bb, label %bb1.return_crit_edge
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bb1.return_crit_edge: ; preds = %bb1
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br label %return
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return: ; preds = %bb1.return_crit_edge, %entry
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ret void
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}
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define void @test(ptr addrspace(1) %a, i32 %n) nounwind {
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;
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; CHECK-LABEL: 'test'
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; CHECK-NEXT: Determining loop execution counts for: @test
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; CHECK-NEXT: Loop %for.body: backedge-taken count is (-1 + (zext i32 %n to i64))<nsw>
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 2147483646
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (-1 + (zext i32 %n to i64))<nsw>
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; CHECK-NEXT: Loop %for.body: Trip multiple is 1
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;
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entry:
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%cmp1 = icmp sgt i32 %n, 0
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br i1 %cmp1, label %for.body.lr.ph, label %for.end
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for.body.lr.ph: ; preds = %entry
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%tmp = zext i32 %n to i64
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br label %for.body
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for.body: ; preds = %for.body, %for.body.lr.ph
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%indvar = phi i64 [ %indvar.next, %for.body ], [ 0, %for.body.lr.ph ]
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%arrayidx = getelementptr i8, ptr addrspace(1) %a, i64 %indvar
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store i8 0, ptr addrspace(1) %arrayidx, align 1
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%indvar.next = add i64 %indvar, 1
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%exitcond = icmp ne i64 %indvar.next, %tmp
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br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge
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for.cond.for.end_crit_edge: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.cond.for.end_crit_edge, %entry
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ret void
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}
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