93 lines
4.0 KiB
LLVM
93 lines
4.0 KiB
LLVM
; RUN: llc < %s -O3 -march=x86-64 -mcpu=core2 | FileCheck %s
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declare i1 @check() nounwind
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declare i1 @foo(i8*, i8*, i8*) nounwind
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; Check that redundant phi elimination ran
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; CHECK: @test
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; CHECK: %while.body.i
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; CHECK: movs
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; CHECK-NOT: movs
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; CHECK: %for.end.i
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define i32 @test(i8* %base) nounwind uwtable ssp {
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entry:
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br label %while.body.lr.ph.i
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while.body.lr.ph.i: ; preds = %cond.true.i
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br label %while.body.i
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while.body.i: ; preds = %cond.true29.i, %while.body.lr.ph.i
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%indvars.iv7.i = phi i64 [ 16, %while.body.lr.ph.i ], [ %indvars.iv.next8.i, %cond.true29.i ]
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%i.05.i = phi i64 [ 0, %while.body.lr.ph.i ], [ %indvars.iv7.i, %cond.true29.i ]
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%sext.i = shl i64 %i.05.i, 32
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%idx.ext.i = ashr exact i64 %sext.i, 32
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%add.ptr.sum.i = add i64 %idx.ext.i, 16
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br label %for.body.i
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for.body.i: ; preds = %for.body.i, %while.body.i
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%indvars.iv.i = phi i64 [ 0, %while.body.i ], [ %indvars.iv.next.i, %for.body.i ]
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%add.ptr.sum = add i64 %add.ptr.sum.i, %indvars.iv.i
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%arrayidx22.i = getelementptr inbounds i8* %base, i64 %add.ptr.sum
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%0 = load i8* %arrayidx22.i, align 1
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%indvars.iv.next.i = add i64 %indvars.iv.i, 1
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%cmp = call i1 @check() nounwind
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br i1 %cmp, label %for.end.i, label %for.body.i
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for.end.i: ; preds = %for.body.i
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%add.ptr.i144 = getelementptr inbounds i8* %base, i64 %add.ptr.sum.i
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%cmp2 = tail call i1 @foo(i8* %add.ptr.i144, i8* %add.ptr.i144, i8* undef) nounwind
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br i1 %cmp2, label %cond.true29.i, label %cond.false35.i
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cond.true29.i: ; preds = %for.end.i
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%indvars.iv.next8.i = add i64 %indvars.iv7.i, 16
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br i1 false, label %exit, label %while.body.i
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cond.false35.i: ; preds = %for.end.i
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unreachable
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exit: ; preds = %cond.true29.i, %cond.true.i
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ret i32 0
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}
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%struct.anon.7.91.199.307.415.475.559.643.751.835.943.1003.1111.1219.1351.1375.1399.1435.1471.1483.1519.1531.1651.1771 = type { i32, i32, i32 }
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@tags = external global [5000 x %struct.anon.7.91.199.307.415.475.559.643.751.835.943.1003.1111.1219.1351.1375.1399.1435.1471.1483.1519.1531.1651.1771], align 16
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; PR11782: SCEVExpander assert
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;
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; Test phi reuse after LSR that requires SCEVExpander to hoist an
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; interesting GEP.
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;
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; CHECK: @test2
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; CHECK: %entry
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; CHECK-NOT: mov
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; CHECK: je
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define void @test2(i32 %n) nounwind uwtable {
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entry:
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br i1 undef, label %while.end, label %for.cond468
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for.cond468: ; preds = %if.then477, %entry
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%indvars.iv1163 = phi i64 [ %indvars.iv.next1164, %if.then477 ], [ 1, %entry ]
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%k.0.in = phi i32* [ %last, %if.then477 ], [ getelementptr inbounds ([5000 x %struct.anon.7.91.199.307.415.475.559.643.751.835.943.1003.1111.1219.1351.1375.1399.1435.1471.1483.1519.1531.1651.1771]* @tags, i64 0, i64 0, i32 2), %entry ]
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%k.0 = load i32* %k.0.in, align 4
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%0 = trunc i64 %indvars.iv1163 to i32
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%cmp469 = icmp slt i32 %0, %n
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br i1 %cmp469, label %for.body471, label %for.inc498
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for.body471: ; preds = %for.cond468
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%first = getelementptr inbounds [5000 x %struct.anon.7.91.199.307.415.475.559.643.751.835.943.1003.1111.1219.1351.1375.1399.1435.1471.1483.1519.1531.1651.1771]* @tags, i64 0, i64 %indvars.iv1163, i32 1
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%1 = load i32* %first, align 4
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br i1 undef, label %if.then477, label %for.inc498
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if.then477: ; preds = %for.body471
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%last = getelementptr inbounds [5000 x %struct.anon.7.91.199.307.415.475.559.643.751.835.943.1003.1111.1219.1351.1375.1399.1435.1471.1483.1519.1531.1651.1771]* @tags, i64 0, i64 %indvars.iv1163, i32 2
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%indvars.iv.next1164 = add i64 %indvars.iv1163, 1
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br label %for.cond468
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for.inc498: ; preds = %for.inc498, %for.body471, %for.cond468
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br label %for.inc498
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while.end: ; preds = %entry
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ret void
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}
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