1cb47a063e
The IR/MIR pseudo probe intrinsics don't get materialized into real machine instructions and therefore they don't incur runtime cost directly. However, they come with indirect cost by blocking certain optimizations. Some of the blocking are intentional (such as blocking code merge) for better counts quality while the others are accidental. This change unblocks perf-critical optimizations that do not affect counts quality. They include: 1. IR InstCombine, sinking load operation to shorten lifetimes. 2. MIR LiveRangeShrink, similar to #1 3. MIR TwoAddressInstructionPass, i.e, opeq transform 4. MIR function argument copy elision 5. IR stack protection. (though not perf-critical but nice to have). Reviewed By: wmi Differential Revision: https://reviews.llvm.org/D95982
67 lines
3.8 KiB
LLVM
67 lines
3.8 KiB
LLVM
; RUN: opt -passes=instcombine -S < %s | FileCheck %s
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%struct.nonbonded = type { [2 x %struct.CompAtom*], [2 x %struct.CompAtomExt*], [2 x %struct.CompAtom*], [2 x %class.Vector*], [2 x %class.Vector*], [2 x i32], %class.Vector, double*, double*, %class.ComputeNonbondedWorkArrays*, %class.Pairlists*, i32, i32, double, double, i32, i32, i32, i32 }
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%struct.CompAtomExt = type { i32 }
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%struct.CompAtom = type { %class.Vector, float, i16, i8, i8 }
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%class.Vector = type { double, double, double }
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%class.ComputeNonbondedWorkArrays = type { %class.ResizeArray, %class.ResizeArray.0, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray, %class.ResizeArray.2, %class.ResizeArray.2 }
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%class.ResizeArray.0 = type { i32 (...)**, %class.ResizeArrayRaw.1* }
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%class.ResizeArrayRaw.1 = type <{ double*, i8*, i32, i32, i32, float, i32, [4 x i8] }>
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%class.ResizeArray = type { i32 (...)**, %class.ResizeArrayRaw* }
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%class.ResizeArrayRaw = type <{ i16*, i8*, i32, i32, i32, float, i32, [4 x i8] }>
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%class.ResizeArray.2 = type { i32 (...)**, %class.ResizeArrayRaw.3* }
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%class.ResizeArrayRaw.3 = type <{ %class.Vector*, i8*, i32, i32, i32, float, i32, [4 x i8] }>
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%class.Pairlists = type { i16*, i32, i32 }
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;; Check the minPart4 and minPart assignments are merged.
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; CHECK-COUNT-1: getelementptr inbounds %struct.nonbonded, %struct.nonbonded* %params, i64 0, i32 16
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; CHECK-NOT: getelementptr inbounds %struct.nonbonded, %struct.nonbonded* %params, i64 0, i32 16
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define dso_local void @_ZN20ComputeNonbondedUtil9calc_pairEP9nonbonded(%struct.nonbonded* nocapture readonly %params) local_unnamed_addr align 2 {
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entry:
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%savePairlists3 = getelementptr inbounds %struct.nonbonded, %struct.nonbonded* %params, i64 0, i32 11
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%0 = load i32, i32* %savePairlists3, align 8
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%usePairlists4 = getelementptr inbounds %struct.nonbonded, %struct.nonbonded* %params, i64 0, i32 12
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%1 = load i32, i32* %usePairlists4, align 4
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%tobool54.not = icmp eq i32 %0, 0
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br i1 %tobool54.not, label %lor.lhs.false55, label %if.end109
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lor.lhs.false55: ; preds = %entry
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%tobool56.not = icmp eq i32 %1, 0
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br i1 %tobool56.not, label %if.end109, label %if.end109.thread
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if.end109.thread: ; preds = %lor.lhs.false55
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%minPart4 = getelementptr inbounds %struct.nonbonded, %struct.nonbonded* %params, i64 0, i32 16
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%2 = load i32, i32* %minPart4, align 4
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call void @llvm.pseudoprobe(i64 -6172701105289426098, i64 2, i32 0, i64 -1)
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br label %if.then138
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if.end109: ; preds = %lor.lhs.false55, %entry
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%minPart = getelementptr inbounds %struct.nonbonded, %struct.nonbonded* %params, i64 0, i32 16
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%3 = load i32, i32* %minPart, align 4
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call void @llvm.pseudoprobe(i64 -6172701105289426098, i64 3, i32 0, i64 -1)
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%tobool116.not = icmp eq i32 %1, 0
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br i1 %tobool116.not, label %if.then117, label %if.then138
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if.then117: ; preds = %if.end109
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ret void
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if.then138: ; preds = %if.end109.thread, %if.end109
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%4 = phi i32 [ %2, %if.end109.thread ], [ %3, %if.end109 ]
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%tobool139.not = icmp eq i32 %4, 0
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br i1 %tobool139.not, label %if.else147, label %if.then140
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if.then140: ; preds = %if.then138
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ret void
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if.else147: ; preds = %if.then138
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ret void
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}
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declare dso_local void @_ZN9Pairlists8addIndexEv() align 2
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; Function Attrs: inaccessiblememonly nounwind willreturn
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declare void @llvm.pseudoprobe(i64, i64, i32, i64) #0
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attributes #0 = { inaccessiblememonly nounwind willreturn }
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