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965784c287
When we calculate MII, we use two loops, one with iterator R++ to check whether we can reserve the resource, then --R to move back the iterator to do reservation. This is risky, as R++, --R may not point to the same element at all. The can cause wrong MII. Differential Revision: https://reviews.llvm.org/D63536 llvm-svn: 364353
37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -verify-machineinstrs\
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; RUN: -mcpu=pwr9 --ppc-enable-pipeliner -debug-only=pipeliner 2>&1 \
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; RUN: >/dev/null | FileCheck %s
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%0 = type { i32, [16 x double] }
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; CHECK: MII = 8 MAX_II = 18
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define dso_local fastcc void @_ZN3povL9polysolveEiPdS0_() unnamed_addr #0 {
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br label %1
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1: ; preds = %1, %0
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br i1 undef, label %2, label %1
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2: ; preds = %1
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br i1 undef, label %14, label %3
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3: ; preds = %3, %2
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%4 = phi i64 [ %7, %3 ], [ undef, %2 ]
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%5 = phi double [ %11, %3 ], [ undef, %2 ]
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%6 = phi i64 [ %12, %3 ], [ undef, %2 ]
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%7 = add nsw i64 %4, -1
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%8 = fmul fast double %5, 1.000000e+07
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%9 = getelementptr inbounds %0, %0* null, i64 1, i32 1, i64 %7
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%10 = load double, double* %9, align 8
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%11 = fadd fast double %10, %8
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%12 = add i64 %6, -1
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%13 = icmp eq i64 %12, 0
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br i1 %13, label %14, label %3
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14: ; preds = %3, %2
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%15 = phi double [ undef, %2 ], [ %11, %3 ]
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%16 = fmul fast double %15, undef
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ret void
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}
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