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https://github.com/RPCSX/llvm.git
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15983b80a0
Instead of having a bunch of separate MOV8r0, MOV16r0, ... pseudo-instructions, it's better to use a single MOV32r0 (which will expand to "xorl %reg, %reg") and obtain other sizes with EXTRACT_SUBREG and SUBREG_TO_REG. The encoding is smaller and partial register updates can sometimes be avoided. Until recently, this sequence was a barrier to rematerialization though. That should now be fixed so it's an appropriate time to make the change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182928 91177308-0d34-0410-b5e6-96231b3b80d8
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 -march=x86-64 < %s -o /dev/null -stats -info-output-file - | grep "hoisted out of loops" | grep 4
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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 ; <[8193 x i8]*> [#uses=3]
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@.str = private constant [11 x i8] c"Count: %d\0A\00" ; <[11 x i8]*> [#uses=1]
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define i32 @main(i32 %argc, i8** 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 i8** %argv, i64 1 ; <i8**> [#uses=1]
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%tmp2 = load i8** %arrayidx ; <i8*> [#uses=1]
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%call = tail call i32 @atoi(i8* %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]* @main.flags, i64 0, i64 %tmp ; <i8*> [#uses=1]
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store i8 1, i8* %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]* @main.flags, i64 0, i64 %tmp68 ; <i8*> [#uses=1]
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%tmp18 = load i8* %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]* @main.flags, i64 0, i64 %tmp75 ; <i8*> [#uses=1]
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store i8 0, i8* %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 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.str, i64 0, i64 0), 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(i8* nocapture) nounwind readonly
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declare i32 @printf(i8* nocapture, ...) nounwind
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