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https://github.com/c64scene-ar/llvm-6502.git
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3b205175ea
present in the bottom of the CFG triangle, as the transformation isn't ever valuable if the branch can't be eliminated. Also, unify some heuristics between SimplifyCFG's multiple if-converters, for consistency. This fixes rdar://10627242. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147630 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
876 B
LLVM
41 lines
876 B
LLVM
; RUN: opt -S -simplifycfg %s | FileCheck %s
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define i8* @test1(i8* %x, i64 %y) nounwind {
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entry:
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%tmp1 = load i8* %x, align 1
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%cmp = icmp eq i8 %tmp1, 47
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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%incdec.ptr = getelementptr inbounds i8* %x, i64 %y
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br label %if.end
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if.end:
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%x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %x, %entry ]
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ret i8* %x.addr
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; CHECK: @test1
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; CHECK-NOT: select
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; CHECK: ret i8* %x.addr
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}
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%ST = type { i8, i8 }
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define i8* @test2(%ST* %x, i8* %y) nounwind {
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entry:
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%cmp = icmp eq %ST* %x, null
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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%incdec.ptr = getelementptr %ST* %x, i32 0, i32 1
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br label %if.end
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if.end:
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%x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %y, %entry ]
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ret i8* %x.addr
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; CHECK: @test2
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; CHECK: %incdec.ptr.y = select i1 %cmp, i8* %incdec.ptr, i8* %y
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; CHECK: ret i8* %incdec.ptr.y
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}
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