derek.holloway
7502bf64a4
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43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=newgvn -S | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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define void @patatino(ptr %blah) {
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; CHECK-LABEL: @patatino(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[WHILE_COND:%.*]]
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; CHECK: while.cond:
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; CHECK-NEXT: [[MEH:%.*]] = phi ptr [ [[BLAH:%.*]], [[ENTRY:%.*]] ], [ null, [[WHILE_BODY:%.*]] ]
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; CHECK-NEXT: switch i32 undef, label [[WHILE_BODY]] [
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; CHECK-NEXT: i32 666, label [[WHILE_END:%.*]]
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; CHECK-NEXT: ]
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; CHECK: while.body:
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; CHECK-NEXT: br label [[WHILE_COND]]
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; CHECK: while.end:
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; CHECK-NEXT: store i8 0, ptr [[MEH]], align 1
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; CHECK-NEXT: store i8 0, ptr [[BLAH]], align 1
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; CHECK-NEXT: ret void
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;
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entry:
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br label %while.cond
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while.cond:
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%meh = phi ptr [ %blah, %entry ], [ null, %while.body ]
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switch i32 undef, label %while.body [
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i32 666, label %while.end
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]
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while.body:
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br label %while.cond
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while.end:
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;; These two stores will initially be considered equivalent, but then proven not.
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;; the second store would previously end up deciding it's equivalent to a previous
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;; store, but it was really just finding an optimistic version of itself
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;; in the congruence class.
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store i8 0, ptr %meh, align 1
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store i8 0, ptr %blah, align 1
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ret void
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}
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