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llvm-svn: 186268
31 lines
933 B
LLVM
31 lines
933 B
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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; CHECK-LABEL: @test1(
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; objectsize should fold to a constant, which causes the branch to fold to an
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; uncond branch. Next, we fold the control flow alltogether.
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; rdar://8785296
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define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 {
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entry:
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%0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false)
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%1 = icmp ugt i64 %0, 3
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br i1 %1, label %T, label %trap
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; CHECK: T:
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; CHECK-NOT: br label %
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trap: ; preds = %0, %entry
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tail call void @llvm.trap() noreturn nounwind
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unreachable
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T:
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; CHECK: ret i32 4
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ret i32 4
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}
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declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
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declare void @llvm.trap() nounwind
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