derek.holloway
7502bf64a4
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46 lines
1.4 KiB
LLVM
46 lines
1.4 KiB
LLVM
; These tests have an infinite trip count. We obviously shouldn't remove the
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; loops! :)
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;
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; RUN: opt < %s -passes='loop(indvars),adce,simplifycfg' -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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;; test for (i = 1; i != 100; i += 2)
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define i32 @infinite_linear() {
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; CHECK-LABEL: @infinite_linear(
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entry:
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br label %loop
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loop: ; preds = %loop, %entry
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; CHECK-LABEL: loop:
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%i = phi i32 [ 1, %entry ], [ %i.next, %loop ] ; <i32> [#uses=3]
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%i.next = add i32 %i, 2 ; <i32> [#uses=1]
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%c = icmp ne i32 %i, 100 ; <i1> [#uses=1]
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; CHECK: icmp
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; CHECK: br
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br i1 %c, label %loop, label %loopexit
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loopexit: ; preds = %loop
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; CHECK-LABEL: loopexit:
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ret i32 %i
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}
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;; test for (i = 1; i*i != 63; ++i)
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define i32 @infinite_quadratic() {
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; CHECK-LABEL: @infinite_quadratic(
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entry:
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br label %loop
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loop: ; preds = %loop, %entry
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; CHECK-LABEL: loop:
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%i = phi i32 [ 1, %entry ], [ %i.next, %loop ] ; <i32> [#uses=4]
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%isquare = mul i32 %i, %i ; <i32> [#uses=1]
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%i.next = add i32 %i, 1 ; <i32> [#uses=1]
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%c = icmp ne i32 %isquare, 63 ; <i1> [#uses=1]
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; CHECK: icmp
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; CHECK: br
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br i1 %c, label %loop, label %loopexit
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loopexit: ; preds = %loop
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; CHECK-LABEL: loopexit:
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ret i32 %i
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}
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