; RUN: opt -S -scalarrepl-ssa < %s | FileCheck %s ; rdar://10589171 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" %struct.foo = type { i32, i32 } @.str = private unnamed_addr constant [6 x i8] c"x=%d\0A\00", align 1 define i32 @main(i32 %argc, i8** nocapture %argv) nounwind uwtable { entry: %f = alloca %struct.foo, align 4 %x.i = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 0, i32 0 store i32 1, i32* %x.i, align 4 %y.i = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 0, i32 1 br label %while.cond.i ; CHECK: while.cond.i: ; CHECK-NEXT: %tmp = phi i32 [ 1, %entry ], [ %tmp2, %while.cond.backedge.i ] ; CHECK-NEXT: %pos.0.i = phi i32 [ 1, %entry ], [ %xtmp.i, %while.cond.backedge.i ] ; CHECK-NEXT: %left.0.i = phi i32 [ 1, %entry ], [ %dec.i, %while.cond.backedge.i ] ; CHECK-NOT: phi while.cond.i: ; preds = %while.cond.backedge.i, %entry %tmp = phi i32 [ 1, %entry ], [ %tmp2, %while.cond.backedge.i ] %pos.0.i = phi i32 [ 1, %entry ], [ %xtmp.i, %while.cond.backedge.i ] %left.0.i = phi i32 [ 1, %entry ], [ %dec.i, %while.cond.backedge.i ] %cmp.i = icmp sgt i32 %left.0.i, 0 br i1 %cmp.i, label %while.body.i, label %while.cond.i.func.exit_crit_edge while.cond.i.func.exit_crit_edge: ; preds = %while.cond.i br label %func.exit while.body.i: ; preds = %while.cond.i %dec.i = add nsw i32 %left.0.i, -1 switch i32 1, label %while.body.i.func.exit_crit_edge [ i32 0, label %while.cond.backedge.i i32 1, label %sw.bb.i ] while.body.i.func.exit_crit_edge: ; preds = %while.body.i br label %func.exit sw.bb.i: ; preds = %while.body.i %cmp2.i = icmp eq i32 %tmp, 1 br i1 %cmp2.i, label %if.then.i, label %if.end.i if.then.i: ; preds = %sw.bb.i store i32 %pos.0.i, i32* %x.i, align 4 br label %if.end.i ; CHECK: if.end.i: ; CHECK-NEXT: %tmp1 = phi i32 [ %pos.0.i, %if.then.i ], [ %tmp, %sw.bb.i ] ; CHECK-NOT: phi if.end.i: ; preds = %if.then.i, %sw.bb.i %tmp1 = phi i32 [ %pos.0.i, %if.then.i ], [ %tmp, %sw.bb.i ] store i32 %tmp1, i32* %y.i, align 4 br label %while.cond.backedge.i ; CHECK: while.cond.backedge.i: ; CHECK-NEXT: %tmp2 = phi i32 [ %tmp1, %if.end.i ], [ %tmp, %while.body.i ] ; CHECK-NOT: phi while.cond.backedge.i: ; preds = %if.end.i, %while.body.i %tmp2 = phi i32 [ %tmp1, %if.end.i ], [ %tmp, %while.body.i ] %xtmp.i = add i32 %pos.0.i, 1 br label %while.cond.i ; CHECK: func.exit: ; CHECK-NOT: load ; CHECK: %call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %tmp) [[NUW:#[0-9]+]] func.exit: ; preds = %while.body.i.func.exit_crit_edge, %while.cond.i.func.exit_crit_edge %tmp3 = load i32, i32* %x.i, align 4 %call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %tmp3) nounwind ret i32 0 } declare i32 @printf(i8* nocapture, ...) nounwind ; CHECK: attributes #0 = { nounwind uwtable } ; CHECK: attributes [[NUW]] = { nounwind }