; RUN: llc < %s -O3 -march=x86-64 -mcpu=core2 | FileCheck %s declare i1 @check() nounwind declare i1 @foo(i8*, i8*, i8*) nounwind ; Check that redundant phi elimination ran ; CHECK: @test ; CHECK: %while.body.i ; CHECK: movs ; CHECK-NOT: movs ; CHECK: %for.end.i define i32 @test(i8* %base) nounwind uwtable ssp { entry: br label %while.body.lr.ph.i while.body.lr.ph.i: ; preds = %cond.true.i br label %while.body.i while.body.i: ; preds = %cond.true29.i, %while.body.lr.ph.i %indvars.iv7.i = phi i64 [ 16, %while.body.lr.ph.i ], [ %indvars.iv.next8.i, %cond.true29.i ] %i.05.i = phi i64 [ 0, %while.body.lr.ph.i ], [ %indvars.iv7.i, %cond.true29.i ] %sext.i = shl i64 %i.05.i, 32 %idx.ext.i = ashr exact i64 %sext.i, 32 %add.ptr.sum.i = add i64 %idx.ext.i, 16 br label %for.body.i for.body.i: ; preds = %for.body.i, %while.body.i %indvars.iv.i = phi i64 [ 0, %while.body.i ], [ %indvars.iv.next.i, %for.body.i ] %add.ptr.sum = add i64 %add.ptr.sum.i, %indvars.iv.i %arrayidx22.i = getelementptr inbounds i8* %base, i64 %add.ptr.sum %0 = load i8* %arrayidx22.i, align 1 %indvars.iv.next.i = add i64 %indvars.iv.i, 1 %cmp = call i1 @check() nounwind br i1 %cmp, label %for.end.i, label %for.body.i for.end.i: ; preds = %for.body.i %add.ptr.i144 = getelementptr inbounds i8* %base, i64 %add.ptr.sum.i %cmp2 = tail call i1 @foo(i8* %add.ptr.i144, i8* %add.ptr.i144, i8* undef) nounwind br i1 %cmp2, label %cond.true29.i, label %cond.false35.i cond.true29.i: ; preds = %for.end.i %indvars.iv.next8.i = add i64 %indvars.iv7.i, 16 br i1 false, label %exit, label %while.body.i cond.false35.i: ; preds = %for.end.i unreachable exit: ; preds = %cond.true29.i, %cond.true.i ret i32 0 } %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 } @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 ; PR11782: SCEVExpander assert ; ; Test phi reuse after LSR that requires SCEVExpander to hoist an ; interesting GEP. ; ; CHECK: @test2 ; CHECK: %entry ; CHECK-NOT: mov ; CHECK: je define void @test2(i32 %n) nounwind uwtable { entry: br i1 undef, label %while.end, label %for.cond468 for.cond468: ; preds = %if.then477, %entry %indvars.iv1163 = phi i64 [ %indvars.iv.next1164, %if.then477 ], [ 1, %entry ] %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 ] %k.0 = load i32* %k.0.in, align 4 %0 = trunc i64 %indvars.iv1163 to i32 %cmp469 = icmp slt i32 %0, %n br i1 %cmp469, label %for.body471, label %for.inc498 for.body471: ; preds = %for.cond468 %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 %1 = load i32* %first, align 4 br i1 undef, label %if.then477, label %for.inc498 if.then477: ; preds = %for.body471 %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 %indvars.iv.next1164 = add i64 %indvars.iv1163, 1 br label %for.cond468 for.inc498: ; preds = %for.inc498, %for.body471, %for.cond468 br label %for.inc498 while.end: ; preds = %entry ret void } ; PR12898: SCEVExpander crash ; Test redundant phi elimination when the deleted phi's increment is ; itself a phi. ; ; CHECK: @test3 ; CHECK: %for.body3.lr.ph.us.i.loopexit ; CHECK-NEXT: in Loop: Header ; CHECK-NEXT: incq ; CHECK-NEXT: .align ; CHECK-NEXT: %for.body3.us.i ; CHECK-NEXT: Inner Loop ; CHECK: testb ; CHECK: jne ; CHECK: jmp define fastcc void @test3(double* nocapture %u) nounwind uwtable ssp { entry: br i1 undef, label %meshBB1, label %meshBB5 for.inc8.us.i: ; preds = %for.body3.us.i br i1 undef, label %meshBB1, label %meshBB for.body3.us.i: ; preds = %meshBB, %for.body3.lr.ph.us.i %indvars.iv.i.SV.phi = phi i64 [ %indvars.iv.next.i, %meshBB ], [ 0, %for.body3.lr.ph.us.i ] %storemerge13.us.i.SV.phi = phi i32 [ 0, %meshBB ], [ 0, %for.body3.lr.ph.us.i ] %Opq.sa.calc12 = sub i32 undef, 227 %0 = add nsw i64 %indvars.iv.i.SV.phi, %indvars.iv8.i.SV.phi26 %1 = trunc i64 %0 to i32 %mul.i.us.i = mul nsw i32 0, %1 %arrayidx5.us.i = getelementptr inbounds double* %u, i64 %indvars.iv.i.SV.phi %2 = load double* %arrayidx5.us.i, align 8 %indvars.iv.next.i = add i64 %indvars.iv.i.SV.phi, 1 br i1 undef, label %for.inc8.us.i, label %meshBB for.body3.lr.ph.us.i: ; preds = %meshBB1, %meshBB %indvars.iv8.i.SV.phi26 = phi i64 [ undef, %meshBB1 ], [ %indvars.iv8.i.SV.phi24, %meshBB ] %arrayidx.us.i = getelementptr inbounds double* undef, i64 %indvars.iv8.i.SV.phi26 %3 = add i64 %indvars.iv8.i.SV.phi26, 1 br label %for.body3.us.i for.inc8.us.i2: ; preds = %meshBB5 unreachable eval_At_times_u.exit: ; preds = %meshBB5 ret void meshBB: ; preds = %for.body3.us.i, %for.inc8.us.i %indvars.iv8.i.SV.phi24 = phi i64 [ undef, %for.body3.us.i ], [ %3, %for.inc8.us.i ] %meshStackVariable.phi = phi i32 [ %Opq.sa.calc12, %for.body3.us.i ], [ undef, %for.inc8.us.i ] br i1 undef, label %for.body3.lr.ph.us.i, label %for.body3.us.i meshBB1: ; preds = %for.inc8.us.i, %entry br label %for.body3.lr.ph.us.i meshBB5: ; preds = %entry br i1 undef, label %eval_At_times_u.exit, label %for.inc8.us.i2 }