108 lines
3.6 KiB
LLVM
108 lines
3.6 KiB
LLVM
; RUN: opt -analyze -branch-prob < %s -enable-new-pm=0 | FileCheck %s
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; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
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declare i32* @"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) personality i32* ()* @"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 undef, 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 { i8*, i32 }
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cleanup
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%v21 = load i8 addrspace(1)*, i8 addrspace(1)* addrspace(256)* inttoptr (i64 8 to i8 addrspace(1)* 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) personality i32* ()* @"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 undef, 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 { i8*, i32 }
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cleanup
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%v21 = load i8 addrspace(1)*, i8 addrspace(1)* addrspace(256)* inttoptr (i64 8 to i8 addrspace(1)* 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) personality i32* ()* @"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 undef, 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 { i8*, i32 }
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cleanup
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%v21 = load i8 addrspace(1)*, i8 addrspace(1)* addrspace(256)* inttoptr (i64 8 to i8 addrspace(1)* 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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