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f02bc70c7d
It's not valid to simply branch to a landingpad block, so it needs to be removed. Also stop trying to scan forward to find a block that can be merged. The predecessor merge rules are more complex than this. This also would need to have considered landingpads. Just do the minimum to delete the block, and let the simplify-cfg reduction handle the branch chain cleanups.
62 lines
1.9 KiB
LLVM
62 lines
1.9 KiB
LLVM
; RUN: llvm-reduce --abort-on-invalid-reduction --delta-passes=unreachable-basic-blocks,basic-blocks --test FileCheck --test-arg --check-prefixes=CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t
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; RUN: FileCheck %s < %t
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; CHECK-INTERESTINGNESS: @func(
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; CHECK-INTERESTINGNESS: store
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; CHECK-INTERESTINGNESS: store
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; CHECK-INTERESTINGNESS: store
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; CHECK: bb:
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; CHECK-NEXT: br i1 %arg1, label %bb3, label %bb7
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; CHECK: bb3: ; preds = %bb
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; CHECK-NEXT: br i1 %arg2, label %bb4, label %bb7
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; CHECK: bb4: ; preds = %bb3
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; CHECK-NEXT: store i32 0, ptr addrspace(1) null, align 4
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; CHECK-NEXT: ret void
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; CHECK: bb7: ; preds = %bb3, %bb
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; CHECK-NEXT: %i = phi i1 [ false, %bb ], [ true, %bb3 ]
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; CHECK-NEXT: store i32 1, ptr addrspace(1) null, align 4
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; CHECK-NEXT: br label %bb10
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; CHECK: bb10: ; preds = %bb7
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; CHECK-NEXT: store i32 2, ptr addrspace(1) null, align 4
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; CHECK-NEXT: unreachable
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define amdgpu_kernel void @func(i1 %arg, i1 %arg1, i1 %arg2) {
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bb:
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br i1 %arg1, label %bb3, label %bb7
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bb3: ; preds = %bb
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br i1 %arg2, label %bb4, label %bb7
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bb4: ; preds = %bb3
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store i32 0, ptr addrspace(1) null
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br label %bb5
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bb5: ; preds = %bb4
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unreachable
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bb6: ; No predecessors!
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unreachable
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bb7: ; preds = %bb3, %bb
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%i = phi i1 [ false, %bb ], [ true, %bb3 ]
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store i32 1, ptr addrspace(1) null
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br i1 %arg, label %bb10, label %bb8
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bb8: ; preds = %bb7
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br i1 %i, label %bb9, label %bb9
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bb9: ; preds = %bb8, %bb8
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unreachable
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bb10: ; preds = %bb7
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store i32 2, ptr addrspace(1) null
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unreachable
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}
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