44 lines
1.6 KiB
LLVM
44 lines
1.6 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -gvn -S | FileCheck %s
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; This test checks that we don't hang trying to split a critical edge in scalar
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; PRE when the control flow uses a callbr instruction.
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define void @wombat(i64 %arg, i64* %arg1, i64 %arg2, i32* %arg3) {
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; CHECK-LABEL: @wombat(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP5:%.*]] = or i64 [[ARG2:%.*]], [[ARG:%.*]]
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; CHECK-NEXT: callbr void asm sideeffect "", "X,X"(i8* blockaddress(@wombat, [[BB7:%.*]]), i8* blockaddress(@wombat, [[BB9:%.*]]))
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; CHECK-NEXT: to label [[BB6:%.*]] [label [[BB7]], label %bb9]
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; CHECK: bb6:
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; CHECK-NEXT: br label [[BB7]]
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; CHECK: bb7:
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; CHECK-NEXT: [[TMP8:%.*]] = trunc i64 [[TMP5]] to i32
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; CHECK-NEXT: tail call void @barney(i32 [[TMP8]])
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; CHECK-NEXT: br label [[BB9]]
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; CHECK: bb9:
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; CHECK-NEXT: [[TMP10:%.*]] = trunc i64 [[TMP5]] to i32
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; CHECK-NEXT: store i32 [[TMP10]], i32* [[ARG3:%.*]]
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; CHECK-NEXT: ret void
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;
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bb:
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%tmp5 = or i64 %arg2, %arg
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callbr void asm sideeffect "", "X,X"(i8* blockaddress(@wombat, %bb7), i8* blockaddress(@wombat, %bb9))
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to label %bb6 [label %bb7, label %bb9]
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bb6: ; preds = %bb
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br label %bb7
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bb7: ; preds = %bb6, %bb
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%tmp8 = trunc i64 %tmp5 to i32
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tail call void @barney(i32 %tmp8)
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br label %bb9
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bb9: ; preds = %bb7, %bb
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%tmp10 = trunc i64 %tmp5 to i32
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store i32 %tmp10, i32* %arg3
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ret void
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}
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declare void @barney(i32)
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