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ef10a35a6b
D79164/2596da31740f changed getCFInstrCost to return 1 per default. AArch64 did not have its own implementation, hence the throughput cost of CFI instructions is overestimated. On most cores, most branches should be predicated and essentially free throughput wise. This restores a 9% performance regression on a SPEC2006 benchmark on AArch64 with -O3 LTO & PGO. This patch effectively restores pre 2596da31740f behavior for AArch64 and undoes the AArch64 test changes of the patch. Reviewers: samparker, dmgreen, anemet Reviewed By: samparker Differential Revision: https://reviews.llvm.org/D82755
58 lines
4.7 KiB
LLVM
58 lines
4.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt < %s -cost-model -analyze -mtriple=arm64-apple-ios -mcpu=cyclone | FileCheck %s --check-prefix=CHECK-THROUGHPUT
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; RUN: opt < %s -cost-model -analyze -cost-kind=code-size -mtriple=aarch64-- | FileCheck %s --check-prefix=CHECK-SIZE
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
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define void @select() {
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; Scalar values
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; CHECK-THROUGHPUT-LABEL: 'select'
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v1 = select i1 undef, i8 undef, i8 undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v2 = select i1 undef, i16 undef, i16 undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v3 = select i1 undef, i32 undef, i32 undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v4 = select i1 undef, i64 undef, i64 undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v5 = select i1 undef, float undef, float undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v6 = select i1 undef, double undef, double undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %v13b = select <16 x i1> undef, <16 x i16> undef, <16 x i16> undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %v15b = select <8 x i1> undef, <8 x i32> undef, <8 x i32> undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %v15c = select <16 x i1> undef, <16 x i32> undef, <16 x i32> undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 80 for instruction: %v16a = select <4 x i1> undef, <4 x i64> undef, <4 x i64> undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 160 for instruction: %v16b = select <8 x i1> undef, <8 x i64> undef, <8 x i64> undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 320 for instruction: %v16c = select <16 x i1> undef, <16 x i64> undef, <16 x i64> undef
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; CHECK-THROUGHPUT-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
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;
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; CHECK-SIZE-LABEL: 'select'
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v1 = select i1 undef, i8 undef, i8 undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v2 = select i1 undef, i16 undef, i16 undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v3 = select i1 undef, i32 undef, i32 undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v4 = select i1 undef, i64 undef, i64 undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v5 = select i1 undef, float undef, float undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v6 = select i1 undef, double undef, double undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v13b = select <16 x i1> undef, <16 x i16> undef, <16 x i16> undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v15b = select <8 x i1> undef, <8 x i32> undef, <8 x i32> undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v15c = select <16 x i1> undef, <16 x i32> undef, <16 x i32> undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v16a = select <4 x i1> undef, <4 x i64> undef, <4 x i64> undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v16b = select <8 x i1> undef, <8 x i64> undef, <8 x i64> undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %v16c = select <16 x i1> undef, <16 x i64> undef, <16 x i64> undef
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; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: ret void
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;
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%v1 = select i1 undef, i8 undef, i8 undef
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%v2 = select i1 undef, i16 undef, i16 undef
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%v3 = select i1 undef, i32 undef, i32 undef
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%v4 = select i1 undef, i64 undef, i64 undef
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%v5 = select i1 undef, float undef, float undef
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%v6 = select i1 undef, double undef, double undef
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%v13b = select <16 x i1> undef, <16 x i16> undef, <16 x i16> undef
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%v15b = select <8 x i1> undef, <8 x i32> undef, <8 x i32> undef
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%v15c = select <16 x i1> undef, <16 x i32> undef, <16 x i32> undef
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; Vector values - check for vectors of i64s that have a high cost because
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; they end up scalarized.
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%v16a = select <4 x i1> undef, <4 x i64> undef, <4 x i64> undef
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%v16b = select <8 x i1> undef, <8 x i64> undef, <8 x i64> undef
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%v16c = select <16 x i1> undef, <16 x i64> undef, <16 x i64> undef
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ret void
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}
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