mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
[LoopSimplify] Improve a test for loop simplify minorly. NFC.
I did some basic testing while looking for a bug in my recent change to loop simplify and even though it didn't find the bug it seems like a useful improvement anyways. llvm-svn: 306256
This commit is contained in:
Chandler Carruth
parent
917627da76
commit
8c5b30db8c
@ -1,17 +1,155 @@
|
||||
; RUN: opt < %s -loop-simplify
|
||||
; RUN: opt < %s -passes=loop-simplify
|
||||
|
||||
; This function should get a preheader inserted before BB3, that is jumped
|
||||
; to by BB1 & BB2
|
||||
;
|
||||
; RUN: opt < %s -S -loop-simplify | FileCheck %s
|
||||
; RUN: opt < %s -S -passes=loop-simplify | FileCheck %s
|
||||
|
||||
; This function should get a preheader inserted before bb3, that is jumped
|
||||
; to by bb1 & bb2
|
||||
define void @test() {
|
||||
br i1 true, label %BB1, label %BB2
|
||||
BB1: ; preds = %0
|
||||
br label %BB3
|
||||
BB2: ; preds = %0
|
||||
br label %BB3
|
||||
BB3: ; preds = %BB3, %BB2, %BB1
|
||||
br label %BB3
|
||||
; CHECK-LABEL: define void @test(
|
||||
entry:
|
||||
br i1 true, label %bb1, label %bb2
|
||||
|
||||
bb1:
|
||||
br label %bb3
|
||||
; CHECK: bb1:
|
||||
; CHECK-NEXT: br label %[[PH:.*]]
|
||||
|
||||
bb2:
|
||||
br label %bb3
|
||||
; CHECK: bb2:
|
||||
; CHECK-NEXT: br label %[[PH]]
|
||||
|
||||
bb3:
|
||||
br label %bb3
|
||||
; CHECK: [[PH]]:
|
||||
; CHECK-NEXT: br label %bb3
|
||||
;
|
||||
; CHECK: bb3:
|
||||
; CHECK-NEXT: br label %bb3
|
||||
}
|
||||
|
||||
; Test a case where we have multiple exit blocks as successors of a single loop
|
||||
; block that need to be made dedicated exit blocks. We also have multiple
|
||||
; exiting edges to one of the exit blocks that all should be rewritten.
|
||||
define void @test_multiple_exits_from_single_block(i8 %a, i8* %b.ptr) {
|
||||
; CHECK-LABEL: define void @test_multiple_exits_from_single_block(
|
||||
entry:
|
||||
switch i8 %a, label %loop [
|
||||
i8 0, label %exit.a
|
||||
i8 1, label %exit.b
|
||||
]
|
||||
; CHECK: entry:
|
||||
; CHECK-NEXT: switch i8 %a, label %[[PH:.*]] [
|
||||
; CHECK-NEXT: i8 0, label %exit.a
|
||||
; CHECK-NEXT: i8 1, label %exit.b
|
||||
; CHECK-NEXT: ]
|
||||
|
||||
loop:
|
||||
%b = load volatile i8, i8* %b.ptr
|
||||
switch i8 %b, label %loop [
|
||||
i8 0, label %exit.a
|
||||
i8 1, label %exit.b
|
||||
i8 2, label %loop
|
||||
i8 3, label %exit.a
|
||||
i8 4, label %loop
|
||||
i8 5, label %exit.a
|
||||
i8 6, label %loop
|
||||
]
|
||||
; CHECK: [[PH]]:
|
||||
; CHECK-NEXT: br label %loop
|
||||
;
|
||||
; CHECK: loop:
|
||||
; CHECK-NEXT: %[[B:.*]] = load volatile i8, i8* %b.ptr
|
||||
; CHECK-NEXT: switch i8 %[[B]], label %[[BACKEDGE:.*]] [
|
||||
; CHECK-NEXT: i8 0, label %[[LOOPEXIT_A:.*]]
|
||||
; CHECK-NEXT: i8 1, label %[[LOOPEXIT_B:.*]]
|
||||
; CHECK-NEXT: i8 2, label %[[BACKEDGE]]
|
||||
; CHECK-NEXT: i8 3, label %[[LOOPEXIT_A]]
|
||||
; CHECK-NEXT: i8 4, label %[[BACKEDGE]]
|
||||
; CHECK-NEXT: i8 5, label %[[LOOPEXIT_A]]
|
||||
; CHECK-NEXT: i8 6, label %[[BACKEDGE]]
|
||||
; CHECK-NEXT: ]
|
||||
;
|
||||
; CHECK: [[BACKEDGE]]:
|
||||
; CHECK-NEXT: br label %loop
|
||||
|
||||
exit.a:
|
||||
ret void
|
||||
; CHECK: [[LOOPEXIT_A]]:
|
||||
; CHECK-NEXT: br label %exit.a
|
||||
;
|
||||
; CHECK: exit.a:
|
||||
; CHECK-NEXT: ret void
|
||||
|
||||
exit.b:
|
||||
ret void
|
||||
; CHECK: [[LOOPEXIT_B]]:
|
||||
; CHECK-NEXT: br label %exit.b
|
||||
;
|
||||
; CHECK: exit.b:
|
||||
; CHECK-NEXT: ret void
|
||||
}
|
||||
|
||||
; Check that we leave already dedicated exits alone when forming dedicated exit
|
||||
; blocks.
|
||||
define void @test_pre_existing_dedicated_exits(i1 %a, i1* %ptr) {
|
||||
; CHECK-LABEL: define void @test_pre_existing_dedicated_exits(
|
||||
entry:
|
||||
br i1 %a, label %loop.ph, label %non_dedicated_exit
|
||||
; CHECK: entry:
|
||||
; CHECK-NEXT: br i1 %a, label %loop.ph, label %non_dedicated_exit
|
||||
|
||||
loop.ph:
|
||||
br label %loop.header
|
||||
; CHECK: loop.ph:
|
||||
; CHECK-NEXT: br label %loop.header
|
||||
|
||||
loop.header:
|
||||
%c1 = load volatile i1, i1* %ptr
|
||||
br i1 %c1, label %loop.body1, label %dedicated_exit1
|
||||
; CHECK: loop.header:
|
||||
; CHECK-NEXT: %[[C1:.*]] = load volatile i1, i1* %ptr
|
||||
; CHECK-NEXT: br i1 %[[C1]], label %loop.body1, label %dedicated_exit1
|
||||
|
||||
loop.body1:
|
||||
%c2 = load volatile i1, i1* %ptr
|
||||
br i1 %c2, label %loop.body2, label %non_dedicated_exit
|
||||
; CHECK: loop.body1:
|
||||
; CHECK-NEXT: %[[C2:.*]] = load volatile i1, i1* %ptr
|
||||
; CHECK-NEXT: br i1 %[[C2]], label %loop.body2, label %[[LOOPEXIT:.*]]
|
||||
|
||||
loop.body2:
|
||||
%c3 = load volatile i1, i1* %ptr
|
||||
br i1 %c3, label %loop.backedge, label %dedicated_exit2
|
||||
; CHECK: loop.body2:
|
||||
; CHECK-NEXT: %[[C3:.*]] = load volatile i1, i1* %ptr
|
||||
; CHECK-NEXT: br i1 %[[C3]], label %loop.backedge, label %dedicated_exit2
|
||||
|
||||
loop.backedge:
|
||||
br label %loop.header
|
||||
; CHECK: loop.backedge:
|
||||
; CHECK-NEXT: br label %loop.header
|
||||
|
||||
dedicated_exit1:
|
||||
ret void
|
||||
; Check that there isn't a split loop exit.
|
||||
; CHECK-NOT: br label %dedicated_exit1
|
||||
;
|
||||
; CHECK: dedicated_exit1:
|
||||
; CHECK-NEXT: ret void
|
||||
|
||||
dedicated_exit2:
|
||||
ret void
|
||||
; Check that there isn't a split loop exit.
|
||||
; CHECK-NOT: br label %dedicated_exit2
|
||||
;
|
||||
; CHECK: dedicated_exit2:
|
||||
; CHECK-NEXT: ret void
|
||||
|
||||
non_dedicated_exit:
|
||||
ret void
|
||||
; CHECK: [[LOOPEXIT]]:
|
||||
; CHECK-NEXT: br label %non_dedicated_exit
|
||||
;
|
||||
; CHECK: non_dedicated_exit:
|
||||
; CHECK-NEXT: ret void
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user