forked from OSchip/llvm-project
44 lines
988 B
LLVM
44 lines
988 B
LLVM
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; RUN: opt < %s -jump-threading -S -verify | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Verify that we do *not* thread any edge. We used to evaluate
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; constant expressions like:
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;
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; icmp ugt i8* null, inttoptr (i64 4 to i8*)
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;
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; as "true", causing jump threading to a wrong destination.
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define void @foo(i8* %arg1, i8* %arg2) {
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; CHECK-LABEL: @foo
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; CHECK-NOT: bb_{{[^ ]*}}.thread:
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entry:
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%cmp1 = icmp eq i8* %arg1, null
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br i1 %cmp1, label %bb_bar1, label %bb_end
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bb_bar1:
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call void @bar(i32 1)
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br label %bb_end
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bb_end:
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%cmp2 = icmp ne i8* %arg2, null
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br i1 %cmp2, label %bb_cont, label %bb_bar2
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bb_bar2:
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call void @bar(i32 2)
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br label %bb_exit
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bb_cont:
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%cmp3 = icmp ule i8* %arg1, inttoptr (i64 4 to i8*)
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br i1 %cmp3, label %bb_exit, label %bb_bar3
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bb_bar3:
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call void @bar(i32 3)
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br label %bb_exit
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bb_exit:
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ret void
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}
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declare void @bar(i32)
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