35 lines
777 B
LLVM
35 lines
777 B
LLVM
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; RUN: llc -mtriple=x86_64-linux-gnu %s -o - -verify-machineinstrs | FileCheck %s
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define i32 @tail_merge_unreachable(i32 %i) {
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entry:
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br i1 undef, label %sw, label %end
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sw:
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switch i32 %i, label %end [
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i32 99, label %sw.bb
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i32 98, label %sw.bb
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i32 101, label %sw.bb
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i32 97, label %sw.bb2
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i32 96, label %sw.bb2
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i32 100, label %sw.bb2
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]
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sw.bb:
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unreachable
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sw.bb2:
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unreachable
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end:
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%p = phi i32 [ 1, %sw ], [ 0, %entry ]
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ret i32 %p
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; CHECK-LABEL: tail_merge_unreachable:
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; Range Check
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; CHECK: addl $-96
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; CHECK: cmpl $5
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; CHECK: jbe [[JUMP_TABLE_BLOCK:[.][A-Za-z0-9_]+]]
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; CHECK: retq
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; CHECK: [[JUMP_TABLE_BLOCK]]:
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; CHECK: btl
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; CHECK: jae [[UNREACHABLE_BLOCK:[.][A-Za-z0-9_]+]]
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; CHECK: [[UNREACHABLE_BLOCK]]:
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; CHECK: .Lfunc_end0
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}
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