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