derek.holloway
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107 lines
3.5 KiB
LLVM
107 lines
3.5 KiB
LLVM
; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
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declare ptr @"personality_function"() #1
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declare void @foo(i32)
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declare void @bar()
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declare void @llvm.experimental.deoptimize.isVoid(...)
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declare void @cold() cold
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; Even though the likeliness of 'invoke' to throw an exception is assessed as low
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; all other paths are even less likely. Check that hot paths leads to excepion handler.
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define void @test1(i32 %0, i1 %arg) personality ptr @"personality_function" !prof !1 {
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;CHECK: edge %entry -> %unreached probability is 0x00000001 / 0x80000000 = 0.00%
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;CHECK: edge %entry -> %invoke probability is 0x7fffffff / 0x80000000 = 100.00% [HOT edge]
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;CHECK: edge %invoke -> %invoke.cont.unreached probability is 0x00000000 / 0x80000000 = 0.00%
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;CHECK: edge %invoke -> %land.pad probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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;CHECK: edge %land.pad -> %exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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entry:
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br i1 %arg, label %unreached, label %invoke, !prof !2
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invoke:
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invoke void @foo(i32 %0)
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to label %invoke.cont.unreached unwind label %land.pad
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invoke.cont.unreached:
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call void (...) @llvm.experimental.deoptimize.isVoid(i32 10) [ "deopt"() ]
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ret void
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unreached:
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unreachable
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land.pad:
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%v20 = landingpad { ptr, i32 }
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cleanup
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%v21 = load ptr addrspace(1), ptr addrspace(256) inttoptr (i64 8 to ptr addrspace(256)), align 8
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br label %exit
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exit:
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call void @bar()
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ret void
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}
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define void @test2(i32 %0, i1 %arg) personality ptr @"personality_function" {
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;CHECK: edge %entry -> %unreached probability is 0x00000000 / 0x80000000 = 0.00%
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;CHECK: edge %entry -> %invoke probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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;CHECK: edge %invoke -> %invoke.cont.cold probability is 0x7fff8000 / 0x80000000 = 100.00% [HOT edge]
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;CHECK: edge %invoke -> %land.pad probability is 0x00008000 / 0x80000000 = 0.00%
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;CHECK: edge %land.pad -> %exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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entry:
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br i1 %arg, label %unreached, label %invoke
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invoke:
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invoke void @foo(i32 %0)
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to label %invoke.cont.cold unwind label %land.pad
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invoke.cont.cold:
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call void @cold()
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ret void
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unreached:
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unreachable
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land.pad:
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%v20 = landingpad { ptr, i32 }
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cleanup
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%v21 = load ptr addrspace(1), ptr addrspace(256) inttoptr (i64 8 to ptr addrspace(256)), align 8
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br label %exit
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exit:
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call void @bar()
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ret void
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}
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define void @test3(i32 %0, i1 %arg) personality ptr @"personality_function" {
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;CHECK: edge %entry -> %unreached probability is 0x00000000 / 0x80000000 = 0.00%
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;CHECK: edge %entry -> %invoke probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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;CHECK: edge %invoke -> %invoke.cont.cold probability is 0x7fff8000 / 0x80000000 = 100.00% [HOT edge]
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;CHECK: edge %invoke -> %land.pad probability is 0x00008000 / 0x80000000 = 0.00%
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;CHECK: edge %land.pad -> %exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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entry:
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br i1 %arg, label %unreached, label %invoke
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invoke:
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invoke void @foo(i32 %0)
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to label %invoke.cont.cold unwind label %land.pad
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invoke.cont.cold:
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call void @cold()
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ret void
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unreached:
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unreachable
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land.pad:
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%v20 = landingpad { ptr, i32 }
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cleanup
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%v21 = load ptr addrspace(1), ptr addrspace(256) inttoptr (i64 8 to ptr addrspace(256)), align 8
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call void @cold()
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br label %exit
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exit:
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call void @bar()
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ret void
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}
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attributes #1 = { nounwind }
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!1 = !{!"function_entry_count", i64 32768}
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!2 = !{!"branch_weights", i32 1, i32 983040}
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