3dd61c1876
Register pressure was only considered if the vector bandwidth was being maximised (chosen either by the target or user options), but #132190 inadvertently caused high pressure VFs to be pruned even when max bandwidth wasn't enabled. This PR returns to the previous behaviour.
33 lines
1.4 KiB
LLVM
33 lines
1.4 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfbfmin -debug-only=loop-vectorize,vplan --disable-output -riscv-v-register-bit-width-lmul=1 -S < %s 2>&1 | FileCheck %s
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define void @add(ptr noalias nocapture readonly %src1, ptr noalias nocapture readonly %src2, i32 signext %size, ptr noalias nocapture writeonly %result) {
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; CHECK-LABEL: add
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; CHECK: LV(REG): Found max usage: 2 item
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; CHECK-NEXT: LV(REG): RegisterClass: RISCV::GPRRC, 3 registers
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; CHECK-NEXT: LV(REG): RegisterClass: RISCV::VRRC, 4 registers
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; CHECK-NEXT: LV(REG): Found invariant usage: 1 item
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; CHECK-NEXT: LV(REG): RegisterClass: RISCV::GPRRC, 1 registers
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entry:
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%conv = zext i32 %size to i64
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%cmp10.not = icmp eq i32 %size, 0
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br i1 %cmp10.not, label %for.cond.cleanup, label %for.body
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for.cond.cleanup:
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ret void
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for.body:
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%i.011 = phi i64 [ %add4, %for.body ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds bfloat, ptr %src1, i64 %i.011
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%0 = load bfloat, ptr %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds bfloat, ptr %src2, i64 %i.011
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%1 = load bfloat, ptr %arrayidx2, align 4
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%add = fadd bfloat %0, %1
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%arrayidx3 = getelementptr inbounds bfloat, ptr %result, i64 %i.011
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store bfloat %add, ptr %arrayidx3, align 4
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%add4 = add nuw nsw i64 %i.011, 1
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%exitcond.not = icmp eq i64 %add4, %conv
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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