db158c7c83
Refresh of the generic scheduling model to use A510 instead of A55. Main benefits are to the little core, and introducing SVE scheduling information. Changes tested on various OoO cores, no performance degradation is seen. Differential Revision: https://reviews.llvm.org/D156799
108 lines
3.9 KiB
LLVM
108 lines
3.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
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; Test LSR for giving small constants, which get re-associated as unfolded
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; offset, a chance to get combined with loop-invariant registers (same as
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; large constants which do not fit as add immediate operands). LSR
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; favors here to bump the base pointer outside the loop.
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; float test(float *arr, long long start, float threshold) {
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; for (long long i = start; i != 0; ++i) {
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; float x = arr[i + 7];
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; if (x > threshold)
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; return x;
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; }
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; return -7;
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; }
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define float @test1(ptr nocapture readonly %arr, i64 %start, float %threshold) {
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; CHECK-LABEL: test1:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: cbz x1, .LBB0_4
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; CHECK-NEXT: // %bb.1: // %for.body.preheader
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; CHECK-NEXT: add x8, x0, #28
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; CHECK-NEXT: .LBB0_2: // %for.body
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; CHECK-NEXT: // =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: ldr s1, [x8, x1, lsl #2]
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; CHECK-NEXT: fcmp s1, s0
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; CHECK-NEXT: b.gt .LBB0_5
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; CHECK-NEXT: // %bb.3: // %for.cond
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; CHECK-NEXT: // in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: add x1, x1, #1
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; CHECK-NEXT: cbnz x1, .LBB0_2
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; CHECK-NEXT: .LBB0_4:
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; CHECK-NEXT: fmov s0, #-7.00000000
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; CHECK-NEXT: ret
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; CHECK-NEXT: .LBB0_5: // %cleanup2
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; CHECK-NEXT: fmov s0, s1
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; CHECK-NEXT: ret
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entry:
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%cmp11 = icmp eq i64 %start, 0
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br i1 %cmp11, label %cleanup2, label %for.body
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for.cond: ; preds = %for.body
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%cmp = icmp eq i64 %inc, 0
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br i1 %cmp, label %cleanup2, label %for.body
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for.body: ; preds = %entry, %for.cond
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%i.012 = phi i64 [ %inc, %for.cond ], [ %start, %entry ]
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%add = add nsw i64 %i.012, 7
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%arrayidx = getelementptr inbounds float, ptr %arr, i64 %add
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%0 = load float, ptr %arrayidx, align 4
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%cmp1 = fcmp ogt float %0, %threshold
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%inc = add nsw i64 %i.012, 1
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br i1 %cmp1, label %cleanup2, label %for.cond
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cleanup2: ; preds = %for.cond, %for.body, %entry
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%1 = phi float [ -7.000000e+00, %entry ], [ %0, %for.body ], [ -7.000000e+00, %for.cond ]
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ret float %1
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}
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; Same as test1, except i has another use:
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; if (x > threshold) ---> if (x > threshold + i)
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define float @test2(ptr nocapture readonly %arr, i64 %start, float %threshold) {
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; CHECK-LABEL: test2:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: cbz x1, .LBB1_4
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; CHECK-NEXT: // %bb.1: // %for.body.preheader
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; CHECK-NEXT: add x8, x0, #28
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; CHECK-NEXT: .LBB1_2: // %for.body
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; CHECK-NEXT: // =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: scvtf s1, x1
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; CHECK-NEXT: fadd s2, s1, s0
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; CHECK-NEXT: ldr s1, [x8, x1, lsl #2]
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; CHECK-NEXT: fcmp s1, s2
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; CHECK-NEXT: b.gt .LBB1_5
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; CHECK-NEXT: // %bb.3: // %for.cond
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; CHECK-NEXT: // in Loop: Header=BB1_2 Depth=1
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; CHECK-NEXT: add x1, x1, #1
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; CHECK-NEXT: cbnz x1, .LBB1_2
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; CHECK-NEXT: .LBB1_4:
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; CHECK-NEXT: fmov s0, #-7.00000000
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; CHECK-NEXT: ret
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; CHECK-NEXT: .LBB1_5: // %cleanup4
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; CHECK-NEXT: fmov s0, s1
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; CHECK-NEXT: ret
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entry:
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%cmp14 = icmp eq i64 %start, 0
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br i1 %cmp14, label %cleanup4, label %for.body
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for.cond: ; preds = %for.body
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%cmp = icmp eq i64 %inc, 0
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br i1 %cmp, label %cleanup4, label %for.body
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for.body: ; preds = %entry, %for.cond
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%i.015 = phi i64 [ %inc, %for.cond ], [ %start, %entry ]
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%add = add nsw i64 %i.015, 7
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%arrayidx = getelementptr inbounds float, ptr %arr, i64 %add
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%0 = load float, ptr %arrayidx, align 4
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%conv = sitofp i64 %i.015 to float
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%add1 = fadd float %conv, %threshold
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%cmp2 = fcmp ogt float %0, %add1
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%inc = add nsw i64 %i.015, 1
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br i1 %cmp2, label %cleanup4, label %for.cond
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cleanup4: ; preds = %for.cond, %for.body, %entry
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%1 = phi float [ -7.000000e+00, %entry ], [ %0, %for.body ], [ -7.000000e+00, %for.cond ]
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ret float %1
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}
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