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455b8d429f
If the blockaddress is not destoryed, the destination block will still be marked as having its address taken, limiting further transformations. I think there are other places where the dead blockaddress constants are kept around, I'll look into that as follow up. Reviewers: craig.topper, brzycki, davide Reviewed By: brzycki, davide Differential Revision: https://reviews.llvm.org/D64936 llvm-svn: 366633
50 lines
1.2 KiB
LLVM
50 lines
1.2 KiB
LLVM
; RUN: opt -S <%s -simplifycfg | FileCheck %s
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define void @test_br(i32 %x) {
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entry:
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; CHECK-LABEL: @test_br(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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%cmp = icmp eq i32 %x, 10
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br i1 %cmp, label %if.then, label %if.then
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if.then: ; preds = %entry
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret void
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}
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define void @test_switch(i32 %x) nounwind {
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entry:
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; CHECK-LABEL: @test_switch(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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%rem = srem i32 %x, 3
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switch i32 %rem, label %sw.bb [
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i32 1, label %sw.bb
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i32 10, label %sw.bb
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]
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sw.bb: ; preds = %sw.default, %entry, %entry
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br label %sw.epilog
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sw.epilog: ; preds = %sw.bb
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ret void
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}
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define void @test_indirectbr(i32 %x) {
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entry:
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; CHECK-LABEL: @test_indirectbr(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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%label = bitcast i8* blockaddress(@test_indirectbr, %L1) to i8*
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indirectbr i8* %label, [label %L1, label %L2]
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L1: ; preds = %entry
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ret void
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L2: ; preds = %entry
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ret void
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}
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