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ffa0068101
In r267672, where the loop distribution pragma was introduced, I tried it hard to keep the old behavior for opt: when opt is invoked with -loop-distribute, it should distribute the loop (it's off by default when ran via the optimization pipeline). As MichaelZ has discovered this has the unintended consequence of breaking a very common developer work-flow to reproduce compilations using opt: First you print the pass pipeline of clang with -debug-pass=Arguments and then invoking opt with the returned arguments. clang -debug-pass will include -loop-distribute but the pass is invoked with default=off so nothing happens unless the loop carries the pragma. While through opt (default=on) we will try to distribute all loops. This changes opt's default to off as well to match clang. The tests are modified to explicitly enable the transformation. llvm-svn: 290235
37 lines
1.4 KiB
LLVM
37 lines
1.4 KiB
LLVM
; RUN: opt -basicaa -loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -S \
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; RUN: < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @fn1(i64 %a, i64* %b) {
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entry:
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br label %for.body
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for.body:
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%add75.epil = phi i64 [ %add7.epil, %for.body ], [ %a, %entry ]
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%add1.epil = add nsw i64 %add75.epil, 268435457
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%arrayidx.epil = getelementptr inbounds i64, i64* %b, i64 %add1.epil
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%load = load i64, i64* %arrayidx.epil, align 8
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%add5.epil = add nsw i64 %add75.epil, 805306369
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%arrayidx6.epil = getelementptr inbounds i64, i64* %b, i64 %add5.epil
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store i64 %load, i64* %arrayidx6.epil, align 8
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%add7.epil = add nsw i64 %add75.epil, 2
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%epil.iter.cmp = icmp eq i64 %add7.epil, 0
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br i1 %epil.iter.cmp, label %for.end, label %for.body
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; CHECK: %[[phi:.*]] = phi i64
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; CHECK: %[[add1:.*]] = add nsw i64 %[[phi]], 268435457
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; CHECK: %[[gep1:.*]] = getelementptr inbounds i64, i64* %b, i64 %[[add1]]
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; CHECK: %[[load:.*]] = load i64, i64* %[[gep1]], align 8
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; CHECK: %[[add2:.*]] = add nsw i64 %[[phi]], 805306369
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; CHECK: %[[gep2:.*]] = getelementptr inbounds i64, i64* %b, i64 %[[add2]]
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; CHECK: store i64 %[[load]], i64* %[[gep2]], align 8
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; CHECK: %[[incr:.*]] = add nsw i64 %[[phi]], 2
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; CHECK: %[[cmp:.*]] = icmp eq i64 %[[incr]], 0
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; CHECK: br i1 %[[cmp]]
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for.end:
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ret void
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}
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