forked from OSchip/llvm-project
45 lines
829 B
LLVM
45 lines
829 B
LLVM
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; RUN: opt -jump-threading -S < %s | FileCheck %s
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@global = external global i8*, align 8
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define i32 @foo(i32 %arg) {
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; CHECK-LABEL: @foo
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; CHECK-LABEL: bb:
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; CHECK: icmp eq
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; CHECK-NEXT: br i1 %tmp1, label %bb7, label %bb7
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bb:
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%tmp = load i8*, i8** @global, align 8
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%tmp1 = icmp eq i8* %tmp, null
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br i1 %tmp1, label %bb3, label %bb2
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; CHECK-NOT: bb2:
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bb2:
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br label %bb3
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; CHECK-NOT: bb3:
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bb3:
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%tmp4 = phi i8 [ 1, %bb2 ], [ 0, %bb ]
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%tmp5 = icmp eq i8 %tmp4, 0
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br i1 %tmp5, label %bb7, label %bb6
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; CHECK-NOT: bb6:
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bb6:
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br label %bb7
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; CHECK-LABEL: bb7:
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bb7:
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%tmp8 = icmp eq i32 %arg, -1
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br i1 %tmp8, label %bb9, label %bb10
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; CHECK-LABEL: bb9:
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bb9:
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ret i32 0
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; CHECK-LABEL: bb10:
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bb10:
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%tmp11 = icmp sgt i32 %arg, -1
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call void @llvm.assume(i1 %tmp11)
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ret i32 1
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}
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declare void @llvm.assume(i1)
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