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Summary: llvm::ConstantFoldTerminator function can convert SwitchInst with single case (and default) to a conditional BranchInst. This patch adds support to preserve make.implicit metadata on this conversion. Reviewers: sanjoy, weimingz, chenli Subscribers: mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D11841 llvm-svn: 244348
31 lines
652 B
LLVM
31 lines
652 B
LLVM
; RUN: opt %s -simplifycfg -S | FileCheck %s
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; ConstantFoldTerminator function can convert SwitchInst with one case (and default) to
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; a conditional BranchInst. This test checks the converted BranchInst preserve the
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; make.implicit metadata.
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declare i32 @consume(i32*)
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declare void @trap()
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define i32 @copy-metadata(i32* %x) {
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entry:
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%x.int = ptrtoint i32* %x to i64
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; CHECK: br i1 %cond, label %is_null, label %default, !make.implicit !0
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switch i64 %x.int, label %default [
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i64 0, label %is_null
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], !make.implicit !0
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default:
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%0 = call i32 @consume(i32* %x)
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ret i32 %0
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is_null:
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call void @trap()
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unreachable
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}
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!0 = !{}
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