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[MemorySSA] Add pointer decrement loop clobber test case.

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This commit is contained in:
Florian Hahn 2020-11-15 17:59:02 +00:00
parent df302df8f2
commit a34e7402ed
1 changed files with 41 additions and 2 deletions
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43
test/Analysis/MemorySSA/phi-translation.ll
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@ -475,8 +475,8 @@ cleanup: ; preds = %while.body, %while.
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
define void @another_loop_clobber() {
; CHECK-LABEL: void @another_loop_clobber
define void @another_loop_clobber_inc() {
; CHECK-LABEL: void @another_loop_clobber_inc
; CHECK-LABEL: loop.header:
; CHECK-NEXT: ; 4 = MemoryPhi({entry,1},{cond.read,3})
@ -514,4 +514,43 @@ cleanup:
ret void
}
define void @another_loop_clobber_dec() {
; CHECK-LABEL: void @another_loop_clobber_dec
; CHECK-LABEL: loop.header:
; CHECK-NEXT: ; 4 = MemoryPhi({entry,1},{cond.read,3})
; CHECK-LABEL: cond.read:
; CHECK: ; MemoryUse(4)
; CHECK-NEXT: %use = load i32, i32* %ptr.1, align 4
; CHECK-NEXT: ; 2 = MemoryDef(4)
; CHECK-NEXT: %c.2 = call i1 @cond(i32 %use)
; CHECK-NEXT: %ptr.10 = getelementptr inbounds [12 x i32], [12 x i32]* %nodeStack, i32 0, i64 %sub
; CHECK-NEXT: ; 3 = MemoryDef(2)
; CHECK-NEXT: store i32 10, i32* %ptr.2, align 4
entry:
%nodeStack = alloca [12 x i32], align 4
%c.1 = call i1 @cond(i32 1)
br i1 %c.1, label %cleanup, label %loop.header
loop.header: ; preds = %entry, %while.cond.backedge
%depth.1 = phi i64 [ %sub, %cond.read], [ 20, %entry ]
%cmp = icmp sgt i64 %depth.1, 6
%sub = sub nsw nuw i64 %depth.1, 3
%sub2 = sub nsw nuw i64 %depth.1, 6
br i1 %cmp, label %cond.read, label %cleanup
cond.read: ; preds = %while.cond
%ptr.1 = getelementptr inbounds [12 x i32], [12 x i32]* %nodeStack, i32 0, i64 %depth.1
%ptr.2 = getelementptr inbounds [12 x i32], [12 x i32]* %nodeStack, i32 0, i64 %sub2
%use = load i32, i32* %ptr.1, align 4
%c.2 = call i1 @cond(i32 %use)
%ptr.10 = getelementptr inbounds [12 x i32], [12 x i32]* %nodeStack, i32 0, i64 %sub
store i32 10, i32* %ptr.2, align 4
br i1 %c.2, label %loop.header, label %cleanup
cleanup:
ret void
}
declare i1 @cond(i32)