81 lines
1.5 KiB
LLVM
81 lines
1.5 KiB
LLVM
; RUN: llc -mcpu=corei7 -mtriple=x86_64-linux < %s | FileCheck %s
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; RUN: llc -mcpu=corei7 -mtriple=x86_64-linux -precise-rotation-cost < %s | FileCheck %s -check-prefix=CHECK-PROFILE
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define void @foo() {
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; Test that not all edges in the loop chain are fall through without profile
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; data.
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;
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; CHECK-LABEL: foo:
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; CHECK: callq e
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; CHECK: callq f
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; CHECK: callq g
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; CHECK: callq h
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entry:
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br label %header
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header:
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call void @e()
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%call = call zeroext i1 @a()
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br i1 %call, label %if.then, label %if.else, !prof !2
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if.then:
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call void @f()
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br label %if.end
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if.else:
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call void @g()
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br label %if.end
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if.end:
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call void @h()
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%call2 = call zeroext i1 @a()
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br i1 %call2, label %header, label %end
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end:
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ret void
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}
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define void @bar() !prof !1 {
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; Test that all edges in the loop chain are fall through with profile data.
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;
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; CHECK-PROFILE-LABEL: bar:
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; CHECK-PROFILE: callq g
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; CHECK-PROFILE: callq h
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; CHECK-PROFILE: callq e
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; CHECK-PROFILE: callq f
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entry:
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br label %header
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header:
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call void @e()
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%call = call zeroext i1 @a()
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br i1 %call, label %if.then, label %if.else, !prof !2
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if.then:
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call void @f()
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br label %if.end
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if.else:
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call void @g()
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br label %if.end
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if.end:
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call void @h()
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%call2 = call zeroext i1 @a()
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br i1 %call2, label %header, label %end
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end:
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ret void
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}
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declare zeroext i1 @a()
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declare void @e()
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declare void @f()
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declare void @g()
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declare void @h()
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!1 = !{!"function_entry_count", i64 1}
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!2 = !{!"branch_weights", i32 16, i32 16}
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