33e60484d7
MachineLICM pass handles inner loops only when outmost loop does not have unique predecessor. If the loop has preheader and there is loop invariant code, the invariant code can be hoisted to the preheader in general. This patch makes the pass handle inner loops in general. Differential Revision: https://reviews.llvm.org/D154205
91 lines
4.9 KiB
LLVM
91 lines
4.9 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc -mtriple=x86_64-apple-darwin < %s -o /dev/null -stats -info-output-file - | grep "hoisted out of loops" | grep 6
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; MachineLICM should be able to hoist the symbolic addresses out of
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; the inner loops.
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@main.flags = internal global [8193 x i8] zeroinitializer, align 16 ; <ptr> [#uses=3]
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@.str = private constant [11 x i8] c"Count: %d\0A\00" ; <ptr> [#uses=1]
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define i32 @main(i32 %argc, ptr nocapture %argv) nounwind ssp {
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entry:
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%cmp = icmp eq i32 %argc, 2 ; <i1> [#uses=1]
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br i1 %cmp, label %while.cond.preheader, label %bb.nph53
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while.cond.preheader: ; preds = %entry
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%arrayidx = getelementptr inbounds ptr, ptr %argv, i64 1 ; <ptr> [#uses=1]
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%tmp2 = load ptr, ptr %arrayidx ; <ptr> [#uses=1]
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%call = tail call i32 @atoi(ptr %tmp2) nounwind ; <i32> [#uses=2]
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%tobool51 = icmp eq i32 %call, 0 ; <i1> [#uses=1]
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br i1 %tobool51, label %while.end, label %bb.nph53
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while.cond.loopexit: ; preds = %for.inc35
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%indvar.next77 = add i32 %indvar76, 1 ; <i32> [#uses=2]
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%exitcond78 = icmp eq i32 %indvar.next77, %NUM.0.ph80 ; <i1> [#uses=1]
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br i1 %exitcond78, label %while.end, label %bb.nph
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bb.nph53: ; preds = %entry, %while.cond.preheader
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%NUM.0.ph80 = phi i32 [ %call, %while.cond.preheader ], [ 17000, %entry ] ; <i32> [#uses=1]
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br label %bb.nph
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bb.nph: ; preds = %while.cond.loopexit, %bb.nph53
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%indvar76 = phi i32 [ 0, %bb.nph53 ], [ %indvar.next77, %while.cond.loopexit ] ; <i32> [#uses=1]
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br label %for.body
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for.body: ; preds = %for.body, %bb.nph
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%indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %for.body ] ; <i64> [#uses=2]
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%tmp = add i64 %indvar, 2 ; <i64> [#uses=1]
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%arrayidx10 = getelementptr [8193 x i8], ptr @main.flags, i64 0, i64 %tmp ; <ptr> [#uses=1]
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store i8 1, ptr %arrayidx10
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%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %indvar.next, 8191 ; <i1> [#uses=1]
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br i1 %exitcond, label %for.body15, label %for.body
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for.body15: ; preds = %for.body, %for.inc35
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%indvar57 = phi i64 [ %indvar.next58, %for.inc35 ], [ 0, %for.body ] ; <i64> [#uses=4]
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%count.248 = phi i32 [ %count.1, %for.inc35 ], [ 0, %for.body ] ; <i32> [#uses=2]
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%tmp68 = add i64 %indvar57, 2 ; <i64> [#uses=2]
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%tmp70 = mul i64 %indvar57, 3 ; <i64> [#uses=1]
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%tmp71 = add i64 %tmp70, 6 ; <i64> [#uses=1]
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%tmp73 = shl i64 %indvar57, 1 ; <i64> [#uses=1]
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%add = add i64 %tmp73, 4 ; <i64> [#uses=2]
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%arrayidx17 = getelementptr [8193 x i8], ptr @main.flags, i64 0, i64 %tmp68 ; <ptr> [#uses=1]
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%tmp18 = load i8, ptr %arrayidx17 ; <i8> [#uses=1]
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%tobool19 = icmp eq i8 %tmp18, 0 ; <i1> [#uses=1]
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br i1 %tobool19, label %for.inc35, label %if.then
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if.then: ; preds = %for.body15
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%cmp2443 = icmp slt i64 %add, 8193 ; <i1> [#uses=1]
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br i1 %cmp2443, label %for.body25, label %for.end32
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for.body25: ; preds = %if.then, %for.body25
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%indvar55 = phi i64 [ %indvar.next56, %for.body25 ], [ 0, %if.then ] ; <i64> [#uses=2]
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%tmp60 = mul i64 %tmp68, %indvar55 ; <i64> [#uses=2]
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%tmp75 = add i64 %add, %tmp60 ; <i64> [#uses=1]
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%arrayidx27 = getelementptr [8193 x i8], ptr @main.flags, i64 0, i64 %tmp75 ; <ptr> [#uses=1]
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store i8 0, ptr %arrayidx27
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%add31 = add i64 %tmp71, %tmp60 ; <i64> [#uses=1]
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%cmp24 = icmp slt i64 %add31, 8193 ; <i1> [#uses=1]
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%indvar.next56 = add i64 %indvar55, 1 ; <i64> [#uses=1]
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br i1 %cmp24, label %for.body25, label %for.end32
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for.end32: ; preds = %for.body25, %if.then
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%inc34 = add nsw i32 %count.248, 1 ; <i32> [#uses=1]
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br label %for.inc35
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for.inc35: ; preds = %for.body15, %for.end32
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%count.1 = phi i32 [ %inc34, %for.end32 ], [ %count.248, %for.body15 ] ; <i32> [#uses=2]
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%indvar.next58 = add i64 %indvar57, 1 ; <i64> [#uses=2]
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%exitcond67 = icmp eq i64 %indvar.next58, 8191 ; <i1> [#uses=1]
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br i1 %exitcond67, label %while.cond.loopexit, label %for.body15
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while.end: ; preds = %while.cond.loopexit, %while.cond.preheader
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%count.0.lcssa = phi i32 [ 0, %while.cond.preheader ], [ %count.1, %while.cond.loopexit ] ; <i32> [#uses=1]
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%call40 = tail call i32 (ptr, ...) @printf(ptr @.str, i32 %count.0.lcssa) nounwind ; <i32> [#uses=0]
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ret i32 0
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}
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declare i32 @atoi(ptr nocapture) nounwind readonly
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declare i32 @printf(ptr nocapture, ...) nounwind
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