maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[DSE] Add additional tests with unreachable exits. 

Adds tests for #53800.
This commit is contained in:
Florian Hahn 2022-02-14 14:28:49 +00:00
parent 55b525e9d2
commit 48f1884333
No known key found for this signature in database
GPG Key ID: EEF712BB5E80EBBA
1 changed files with 138 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

138
llvm/test/Transforms/DeadStoreElimination/multiblock-unreachable.ll
View File

@ -57,3 +57,141 @@ bb50: ; preds = %bb43
bb53: ; preds = %bb53, %bb50, %bb22, %bb
br label %bb53
}
declare void @exit()
define void @unreachable_exit_with_no_call(i64* noalias %ptr, i1 %c.1) {
; CHECK-LABEL: @unreachable_exit_with_no_call(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 1, i64* [[PTR:%.*]], align 8
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: unreachable
; CHECK: if.end:
; CHECK-NEXT: store i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
entry:
store i64 1, i64* %ptr, align 8
br i1 %c.1, label %if.then, label %if.end
if.then:
unreachable
if.end:
store i64 0, i64* %ptr, align 8
ret void
}
; Test for PR53800.
define void @unreachable_exit_with_nounwind_call_pr53800(i64* noalias %ptr, i1 %c.1) {
; CHECK-LABEL: @unreachable_exit_with_nounwind_call_pr53800(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 1, i64* [[PTR:%.*]], align 8
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: tail call void @exit() #[[ATTR0:[0-9]+]]
; CHECK-NEXT: unreachable
; CHECK: if.end:
; CHECK-NEXT: store i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
entry:
store i64 1, i64* %ptr, align 8
br i1 %c.1, label %if.then, label %if.end
if.then:
tail call void @exit() nounwind
unreachable
if.end:
store i64 0, i64* %ptr, align 8
ret void
}
; The call @exit may read %ptr as it is not marked as noalias
define void @unreachable_exit_and_call_may_read(i64* %ptr, i1 %c.1) {
; CHECK-LABEL: @unreachable_exit_and_call_may_read(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 1, i64* [[PTR:%.*]], align 8
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: tail call void @exit() #[[ATTR0]]
; CHECK-NEXT: unreachable
; CHECK: if.end:
; CHECK-NEXT: store i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
entry:
store i64 1, i64* %ptr, align 8
br i1 %c.1, label %if.then, label %if.end
if.then:
tail call void @exit() nounwind
unreachable
if.end:
store i64 0, i64* %ptr, align 8
ret void
}
define void @unreachable_exit_with_may_unwind_call(i64* noalias %ptr, i1 %c.1) {
; CHECK-LABEL: @unreachable_exit_with_may_unwind_call(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 1, i64* [[PTR:%.*]], align 8
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: tail call void @exit()
; CHECK-NEXT: unreachable
; CHECK: if.end:
; CHECK-NEXT: store i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
entry:
store i64 1, i64* %ptr, align 8
br i1 %c.1, label %if.then, label %if.end
if.then:
tail call void @exit()
unreachable
if.end:
store i64 0, i64* %ptr, align 8
ret void
}
; Cannot remove the store in entry, because it is not dead on the path to e.1
define void @unreachable_exit_but_another_exit(i64* noalias %ptr, i1 %c.1, i32 %s, i1 %c.2) {
; CHECK-LABEL: @unreachable_exit_but_another_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 1, i64* [[PTR:%.*]], align 8
; CHECK-NEXT: br i1 [[C_1:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br i1 [[C_2:%.*]], label [[E_0:%.*]], label [[E_1:%.*]]
; CHECK: e.0:
; CHECK-NEXT: tail call void @exit() #[[ATTR0]]
; CHECK-NEXT: unreachable
; CHECK: e.1:
; CHECK-NEXT: ret void
; CHECK: if.end:
; CHECK-NEXT: store i64 0, i64* [[PTR]], align 8
; CHECK-NEXT: ret void
;
entry:
store i64 1, i64* %ptr, align 8
br i1 %c.1, label %if.then, label %if.end
if.then:
br i1 %c.2, label %e.0, label %e.1
e.0:
tail call void @exit() nounwind
unreachable
e.1:
ret void
if.end:
store i64 0, i64* %ptr, align 8
ret void
}