forked from OSchip/llvm-project
60 lines
1.7 KiB
LLVM
60 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -o - -structurizecfg -verify-dom-info < %s | FileCheck %s
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; This test hits a limitation in StructurizeCFG: it doesn't handle infinite-loops.
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; In this case, the IR remains unchanged.
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define void @infinite_loop_false(ptr addrspace(1) %out, i1 %cond) {
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; CHECK-LABEL: @infinite_loop_false(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[FOR_END:%.*]], label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: store volatile i32 999, ptr addrspace(1) [[OUT:%.*]], align 4
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; CHECK-NEXT: br label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %for.end, label %for.body
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for.body:
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store volatile i32 999, ptr addrspace(1) %out, align 4
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br label %for.body
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for.end:
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ret void
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}
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define void @infinite_loop_on_branch(ptr addrspace(1) %out, i1 %cond) {
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; CHECK-LABEL: @infinite_loop_on_branch(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: store volatile i32 999, ptr addrspace(1) [[OUT:%.*]], align 4
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; CHECK-NEXT: br label [[FOR_BODY]]
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; CHECK: if.else:
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; CHECK-NEXT: store volatile i32 111, ptr addrspace(1) [[OUT]], align 4
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %if.then, label %if.else
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if.then:
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br label %for.body
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for.body:
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store volatile i32 999, ptr addrspace(1) %out, align 4
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br label %for.body
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if.else:
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store volatile i32 111, ptr addrspace(1) %out, align 4
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br label %exit
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exit:
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ret void
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}
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