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774ae973b9
factory functions for the two modes the loop unroller is actually used in in-tree: simplified full-unrolling and the entire thing including partial unrolling. I've also wired these up to nice names so you can express both of these being in a pipeline easily. This is a precursor to actually enabling these parts of the O2 pipeline. Differential Revision: https://reviews.llvm.org/D28897 llvm-svn: 293136
25 lines
858 B
LLVM
25 lines
858 B
LLVM
; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(unroll-full)' -unroll-max-iteration-count-to-analyze=100 -unroll-threshold=10 -unroll-max-percent-threshold-boost=200 | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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define i64 @propagate_loop_phis() {
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; CHECK-LABEL: @propagate_loop_phis(
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; CHECK-NOT: br i1
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; CHECK: ret i64 3
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entry:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %inc, %loop ]
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%x0 = phi i64 [ 0, %entry ], [ %x2, %loop ]
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%x1 = or i64 %x0, 1
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%x2 = or i64 %x1, 2
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%inc = add nuw nsw i64 %iv, 1
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%cond = icmp sge i64 %inc, 10
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br i1 %cond, label %loop.end, label %loop
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loop.end:
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%x.lcssa = phi i64 [ %x2, %loop ]
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ret i64 %x.lcssa
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}
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