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https://github.com/c64scene-ar/llvm-6502.git
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876dd978b8
The original version didn't properly account for the base register being modified before the final jump, so caused miscompilations in Chromium and LLVM. I've fixed this and tested with an LLVM self-host (I don't have the means to build & test Chromium). The general idea remains the same: in pathological cases jump tables can be too far away from the instructions referencing them (like other constants) so they need to be movable. Should fix PR23627. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238680 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
1021 B
LLVM
34 lines
1021 B
LLVM
; RUN: llc < %s -mtriple thumbv6-apple-macosx10.6.0 | FileCheck %s
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; test that we print the label of a bb that is only used in a jump table.
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; CHECK: .long [[JUMPTABLE_DEST:LBB[0-9]+_[0-9]+]]
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; CHECK: [[JUMPTABLE_DEST]]:
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define i32 @calculate() {
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entry:
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switch i32 undef, label %return [
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i32 1, label %sw.bb
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i32 2, label %sw.bb6
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i32 3, label %sw.bb13
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i32 4, label %sw.bb20
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]
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sw.bb: ; preds = %entry
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br label %return
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sw.bb6: ; preds = %entry
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br label %return
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sw.bb13: ; preds = %entry
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br label %return
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sw.bb20: ; preds = %entry
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%div = sdiv i32 undef, undef
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br label %return
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return: ; preds = %sw.bb20, %sw.bb13, %sw.bb6, %sw.bb, %entry
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%retval.0 = phi i32 [ %div, %sw.bb20 ], [ undef, %sw.bb13 ], [ undef, %sw.bb6 ], [ undef, %sw.bb ], [ 0, %entry ]
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ret i32 %retval.0
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}
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