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https://github.com/c64scene-ar/llvm-6502.git
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5649ba70fb
I also changed -simplifycfg, -jump-threading and -codegenprepare to use this to produce slightly better code without any extra cleanup passes (AFAICT this was the only place in -simplifycfg where now-dead conditions of replaced terminators weren't being cleaned up). The only other user of this function is -sccp, but I didn't read that thoroughly enough to figure out whether it might be holding pointers to instructions that could be deleted by this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131855 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.3 KiB
LLVM
53 lines
1.3 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: @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: @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: @test_indirectbr
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; CHECK-NEXT: entry:
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; Ideally this should now check:
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; CHK-NEXT: ret void
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; But that doesn't happen yet. Instead:
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; CHECK-NEXT: br label %L1
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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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